<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">ср, 8 февр. 2023 г., 20:53 Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com" target="_blank" rel="noreferrer">terjejhanssen@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div>
    <br>
    <br>
    <div>Den 08.02.2023 16:45, skrev Terje J.
      Hanssen:<br>
    </div>
    <blockquote type="cite">
      
      <br>
      <br>
      <div>Den 08.02.2023 15:34, skrev Andrew
        Randrianasulu:<br>
      </div>
      <blockquote type="cite">
        
        <div dir="auto">
          <div><br>
            <br>
            <div class="gmail_quote">
              <div dir="ltr" class="gmail_attr">ср, 8 февр. 2023 г.,
                17:16 Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com" rel="noreferrer
                  noreferrer noreferrer noreferrer" target="_blank">terjejhanssen@gmail.com</a>>:<br>
              </div>
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div> <br>
                  <br>
                  <div>Den 08.02.2023 14:21, skrev Andrew Randrianasulu:<br>
                  </div>
                  <blockquote type="cite">
                    <div dir="auto">
                      <div><br>
                        <br>
                        <div class="gmail_quote">
                          <div dir="ltr" class="gmail_attr">ср, 8 февр.
                            2023 г., 14:47 Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com" rel="noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">terjejhanssen@gmail.com</a>>:<br>
                          </div>
                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                            <div> <br>
                              <br>
                              <div>Den 08.02.2023 02:38, skrev Andrew
                                Randrianasulu:<br>
                              </div>
                              <blockquote type="cite">
                                <div dir="auto">
                                  <div><br>
                                    <br>
                                    <div class="gmail_quote">
                                      <div dir="ltr" class="gmail_attr">ср,
                                        8 февр. 2023 г., 04:08 Terje J.
                                        Hanssen <<a href="mailto:terjejhanssen@gmail.com" rel="noreferrer noreferrer
                                          noreferrer noreferrer noreferrer noreferrer" target="_blank">terjejhanssen@gmail.com</a>>:<br>
                                      </div>
                                      <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                        <div> <br>
                                          <br>
                                          <div>Den 08.02.2023 00:52,
                                            skrev Andrew Randrianasulu:<br>
                                          </div>
                                          <blockquote type="cite">
                                            <div dir="auto">
                                              <div><br>
                                                <br>
                                                <div class="gmail_quote">
                                                  <div dir="ltr" class="gmail_attr">ср,
                                                    8 февр. 2023 г.,
                                                    01:35 Terje J.
                                                    Hanssen via Cin <<a href="mailto:cin@lists.cinelerra-gg.org" rel="noreferrer noreferrer
                                                      noreferrer
                                                      noreferrer
                                                      noreferrer noreferrer noreferrer" target="_blank">cin@lists.cinelerra-gg.org</a>>:<br>
                                                  </div>
                                                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                    <div> <br>
                                                      <br>
                                                      <div>Den
                                                        02.02.2023
                                                        01:46, skrev
                                                        Terje J.
                                                        Hanssen:<br>
                                                      </div>
                                                      <blockquote type="cite"> <font face="Courier
                                                          New, Courier,
                                                          monospace"><font face="Courier
                                                          New, Courier,
                                                          monospace">.......</font></font><font face="Courier
                                                          New, Courier,
                                                          monospace"><br>
                                                        </font></blockquote>
                                                      <br>
                                                      <blockquote type="cite"><font face="Courier
                                                          New, Courier,
                                                          monospace">
                                                          but I prepare
                                                          myself to test
                                                          and use one
                                                          method left
                                                          with regards
                                                          to "Personal
                                                          Video
                                                          Archiving".<br>
                                                          <br>
                                                          Therefore I
                                                          have ordered
                                                          two selected,
                                                          inexpensive
                                                          devices (the
                                                          urls here are
                                                          just for
                                                          English
                                                          language):<br>
                                                          <br>
                                                          1) Capture
                                                          Card USB HDMI
                                                          4K to 1080P
                                                          USB-C adapter
                                                          (Speedy USB
                                                          3.2/3.1/3.0, </font><font face="Courier
                                                          New, Courier,
                                                          monospace"><font face="Courier
                                                          New, Courier,
                                                          monospace">60
                                                          Hz and 1080p
                                                          FHD.</font>)<br>
                                                          <a href="https://www.turascandinavia.com/en/products/computer/microphone-webcam/webcams/74257" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.turascandinavia.com/en/products/computer/microphone-webcam/webcams/74257</a><br>
                                                        </font>
                                                        <ul>
                                                          <li><font face="Courier
                                                          New, Courier,
                                                          monospace">Fluid
                                                          video
                                                          recordings
                                                          without delays
                                                          or distortions
                                                          during live
                                                          streaming</font></li>
                                                          <li><font face="Courier
                                                          New, Courier,
                                                          monospace">Linux
                                                          not mentioned,
                                                          but assumed
                                                          this is a
                                                          standard
                                                          supported UVC.
                                                          OBS and VLC is
                                                          mentioned.</font></li>
                                                        </ul>
                                                      </blockquote>
                                                      <br>
                                                      <font face="monospace">Then
                                                        the first item,
                                                        Hama Video
                                                        Recording Stick,
                                                        HDMI 4k - USB3.x
                                                        is received. It
                                                        promises: <br>
                                                        "Fluid video
                                                        recordings
                                                        without delays
                                                        or distortions
                                                        during live
                                                        streaming,
                                                        thanks to a
                                                        picture
                                                        frequency of 60
                                                        Hz and 1080p
                                                        with Full HD.
                                                        Transform
                                                        high-quality
                                                        video cameras
                                                        into a
                                                        high-resolution
                                                        USB web camera".<br>
                                                        <br>
                                                        I have done a
                                                        quick, first
                                                        test using my
                                                        Sony HDR-FX7E
                                                        camera. This is
                                                        a HDV 1080i
                                                        camcorder with
                                                        MPEG-2 video
                                                        compression at
                                                        25 mbps on tape
                                                        1440x1080,
                                                        50i25fps, 4:2:0
                                                        and MP2 stereo
                                                        audio. Currently
                                                        it's cassette
                                                        deck is broken
                                                        and needs repair
                                                        service. <br>
                                                        <br>
                                                        But according to
                                                        Steve Mullen's
                                                        V1 and FX7
                                                        handbook (not
                                                        mentioned in the
                                                        manual):<br>
                                                      </font>
                                                      <blockquote><font face="monospace">1. When the camera is operating, the EIP (Enhanced
                                                          Image
                                                          Processor)
                                                          generates
                                                          uncompressed
                                                          1440x1080i
                                                          with a 4:2:2
                                                          color space. </font><font face="monospace">Digital 4:2:2 data are output via the HDMI port while
                                                          4:2:2 analog
                                                          is output via
                                                          component-out.
                                                          Therefore, you
                                                          can record
                                                          4:2:2 live HD
                                                          video from the
                                                          camera without
                                                          MPEG-2
                                                          compression.
                                                          V1 and FX7
                                                          provide an
                                                          HDMI output
                                                          port that
                                                          carries
                                                          uncompressed
                                                          4:2:2, 8-bit,
                                                          digital video
                                                          plus
                                                          dual-channel,
                                                          PCM, 16-bit,
                                                          48kHz audio
                                                          When the
                                                          camera is
                                                          running. </font><br>
                                                        <br>
                                                        <font face="monospace">2.
                                                          If you are
                                                          playing a
                                                          1080i50 or
                                                          1080i60 HDV
                                                          tape. The
                                                          4:2:0 MPEG-2
                                                          is decoded and
                                                          chroma
                                                          up-scaled to a
                                                          4:2:2. The
                                                          HDMI</font><br>
                                                        <font face="monospace">chip
                                                          downscales
                                                          1440 to 1280
                                                          while it
                                                          up-scales 540
                                                          to 720. The
                                                          result is
                                                          720p50 or
                                                          720p60, which
                                                          is output via
                                                          HDMI.<br>
                                                        </font></blockquote>
                                                      <font face="monospace">That
                                                        is, I have
                                                        tested section 1
                                                        now, but see now
                                                        that I didn't
                                                        test 1440x1080
                                                        resolution. The
                                                        only resolution
                                                        I got to work at
                                                        25 fps was
                                                        720x576 (SD),
                                                        while HD
                                                        1280x720 and FHD
                                                        1920x1080 were
                                                        set down to 10
                                                        fps and 5 fps
                                                        respectively by
                                                        the driver and
                                                        caused jumpy
                                                        playback.<br>
                                                      </font></div>
                                                  </blockquote>
                                                </div>
                                              </div>
                                              <div dir="auto"><br>
                                              </div>
                                              <div dir="auto">Did you
                                                tried to force specific
                                                format (uncompressed)
                                                before -i parameter for
                                                ffmpeg? </div>
                                            </div>
                                          </blockquote>
                                          <br>
                                          Just "-framerate 25
                                          -video_size 1920x1080" before
                                          -i as repeated in the code as
                                          follows, where I tested to
                                          encode to uncompressed v210
                                          instead of ffv1, but with no
                                          change with regards to low 5
                                          fps:<br>
                                          <br>
                                          ffmpeg -hide_banner -f v4l2
                                          -framerate 25 -video_size
                                          1920x1080 -i /dev/video0
                                          -codec:v v210 -codec:a
                                          pcm_s16le -f matroska
                                          1920x1080_v210.mkv<br>
                                          [video4linux2,v4l2 @
                                          0x55944900e0c0] The driver
                                          changed the time per frame
                                          from 1/25 to 1/5<br>
                                          <br>
                                          I also read a related issue
                                          and reply to this post at
                                          Superuser, where 1920x1080 was
                                          not supported on the webcam.<br>
                                          <a href="https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080" rel="noreferrer noreferrer
                                            noreferrer noreferrer
                                            noreferrer noreferrer noreferrer" target="_blank">https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080</a><br>
                                          <br>
                                          <blockquote type="cite">
                                            <div dir="auto">
                                              <div dir="auto">Also look
                                                out for usb2 vs usb3
                                                ports? Shouldn't capture
                                                device hang on bus 002
                                                (usb 3.0) root hub,
                                                instead of bus 001 (usb
                                                2.0 root hub), from
                                                lsusb below?</div>
                                            </div>
                                          </blockquote>
                                          <br>
                                          This may well work better. I
                                          have to admit that I have
                                          never studied the difference
                                          between shared usb buses. My
                                          thought was to try to change
                                          the connected usb devices, but
                                          tested first the only free
                                          usb3 port (blue) on the add-on
                                          frontpanel of the workstation.
                                          The other two usb3 ports are
                                          on the backpanel and are used
                                          for the Asus blu-ray burner
                                          and 8TB Seagate expansion
                                          video disc. <br>
                                          <br>
                                          The other usb ports on both
                                          panels are usb2 ports, whereof
                                          two for the wireless keyboard
                                          and mouse on the fronpanel.
                                          What I possibly already have
                                          mentioned before, is that
                                          sometimes if I connect a
                                          usb(2) device or memory to the
                                          usb3 port on the frontpanel,
                                          this cause hang on the
                                          keyboard or mouse. But this
                                          didn't happend this time with
                                          the USB3 capture stick.<br>
                                          <br>
                                          <blockquote type="cite">
                                            <div dir="auto">
                                              <div dir="auto"><br>
                                              </div>
                                              <div dir="auto"><br>
                                              </div>
                                              <div dir="auto">
                                                <div class="gmail_quote">
                                                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                    <div><font face="monospace">
                                                        <br>
                                                        Someone here
                                                        that have
                                                        suggestion to
                                                        possibly
                                                        modified syntax
                                                        or can verify
                                                        that the driver
                                                        doesn't manage
                                                        this?<br>
                                                        <br>
                                                        Another (setup)
                                                        problem, there
                                                        was no audio
                                                        recorded or
                                                        heard during
                                                        playback!?<br>
                                                        <br>
                                                        In the following
                                                        I list the test
                                                        command syntax
                                                        I've collectedf
                                                        and tried with
                                                        shortened output
                                                        (yet long):<br>
                                                        To explain, I
                                                        have also
                                                        another USB 2.0
                                                        Webcam
                                                        connected,
                                                        beside the new
                                                        HDMI-USB3
                                                        Videstick.<br>
                                                        <br>
                                                        Verify the
                                                        devices, drivers
                                                        and formats:<br>
---------------------------------------<br>
                                                        dmesg | tail<br>
                                                        [22706.060759]
                                                        perf: interrupt
                                                        took too long
                                                        (2521 >
                                                        2500), lowering
kernel.perf_event_max_sample_rate to 79250<br>
                                                        [32105.561575]
                                                        perf: interrupt
                                                        took too long
                                                        (3158 >
                                                        3151), lowering
kernel.perf_event_max_sample_rate to 63250<br>
                                                        [40586.477420]
                                                        usb 1-5: USB
                                                        disconnect,
                                                        device number 2<br>
                                                        [40599.099612]
                                                        usb 1-5: new
                                                        high-speed USB
                                                        device number 5
                                                        using xhci_hcd<br>
                                                        [40599.250960]
                                                        usb 1-5: New USB
                                                        device found,
                                                        idVendor=534d,
                                                        idProduct=2109,
                                                        bcdDevice=21.00<br>
                                                        [40599.250972]
                                                        usb 1-5: New USB
                                                        device strings:
                                                        Mfr=1,
                                                        Product=2,
                                                        SerialNumber=0<br>
                                                        [40599.250978]
                                                        usb 1-5:
                                                        Product: USB
                                                        Video<br>
                                                        [40599.250984]
                                                        usb 1-5:
                                                        Manufacturer:
                                                        MACROSILICON<br>
                                                        [40599.252310]
                                                        usb 1-5: Found
                                                        UVC 1.00 device
                                                        USB Video
                                                        (534d:2109)<br>
                                                        [40599.256234]
                                                        hid-generic
                                                        0003:534D:2109.0006:
hiddev96,hidraw0: USB HID v1.10 Device [MACROSILICON USB Video] on
                                                        usb-0000:00:14.0-5/input4<br>
-----------------------------<br>
                                                        <br>
                                                        lsusb<br>
                                                        Bus 002 Device
                                                        003: ID
                                                        05e3:0732
                                                        Genesys Logic,
                                                        Inc. All-in-One
                                                        Cardreader<br>
                                                        Bus 002 Device
                                                        002: ID
                                                        0bc2:2038
                                                        Seagate RSS LLC
                                                        Expansion HDD<br>
                                                        Bus 002 Device
                                                        001: ID
                                                        1d6b:0003 Linux
                                                        Foundation 3.0
                                                        root hub<br>
                                                        Bus 001 Device
                                                        003: ID
                                                        046d:c534
                                                        Logitech, Inc.
                                                        Unifying
                                                        Receiver<br>
                                                        Bus 001 Device
                                                        005: ID
                                                        534d:2109
                                                        MacroSilicon USB
                                                        Video<br>
                                                        Bus 001 Device
                                                        004: ID
                                                        0c45:6340
                                                        Microdia Camera<br>
                                                        Bus 001 Device
                                                        001: ID
                                                        1d6b:0002 Linux
                                                        Foundation 2.0
                                                        root hub<br>
                                                        <br>
                                                        <br>
                                                        udevadm info 
                                                        /dev/video* |
                                                        egrep
                                                        'DEVNAME|ID_V4L_PRODUCT'<br>
                                                        E:
                                                        DEVNAME=/dev/video0<br>
                                                        E:
                                                        ID_V4L_PRODUCT=USB
                                                        Video: USB Video<br>
                                                        E:
                                                        DEVNAME=/dev/video1<br>
                                                        E:
                                                        ID_V4L_PRODUCT=USB
                                                        Video: USB Video<br>
                                                        E:
                                                        DEVNAME=/dev/video2<br>
                                                        E:
                                                        ID_V4L_PRODUCT=USB
                                                        2.0 Camera: HD
                                                        720P Webcam<br>
                                                        E:
                                                        DEVNAME=/dev/video3<br>
                                                        E:
                                                        ID_V4L_PRODUCT=USB
                                                        2.0 Camera: HD
                                                        720P Webcam<br>
                                                        <br>
                                                        lsusb | egrep
                                                        'Video|Camera'<br>
                                                        Bus 001 Device
                                                        005: ID
                                                        534d:2109
                                                        MacroSilicon USB
                                                        Video<br>
                                                        Bus 001 Device
                                                        004: ID
                                                        0c45:6340
                                                        Microdia Camera<br>
                                                        <br>
--------------------<br>
                                                        <br>
                                                        ll /dev/video*<br>
                                                        crw-rw----+ 1
                                                        root video 81, 0
                                                        feb.   7 20:22
                                                        /dev/video0<br>
                                                        crw-rw----+ 1
                                                        root video 81, 1
                                                        feb.   7 20:22
                                                        /dev/video1<br>
                                                        crw-rw----+ 1
                                                        root video 81, 2
                                                        feb.   7 09:05
                                                        /dev/video2<br>
                                                        crw-rw----+ 1
                                                        root video 81, 3
                                                        feb.   7 09:05
                                                        /dev/video3<br>
                                                        <br>
-----------------------<br>
                                                        <br>
                                                        v4l2-ctl
                                                        --list-devices<br>
                                                        USB 2.0 Camera:
                                                        HD 720P Webcam
                                                        (usb-0000:00:14.0-11):<br>
                                                               
                                                        /dev/video2<br>
                                                               
                                                        /dev/video3<br>
                                                        <br>
                                                        USB Video: USB
                                                        Video
                                                        (usb-0000:00:14.0-5):<br>
                                                               
                                                        /dev/video0<br>
                                                               
                                                        /dev/video1<br>
                                                        <br>
-------------------------<br>
                                                        <br>
                                                        ffmpeg -f v4l2
                                                        -list_formats
                                                        all -i
                                                        /dev/video0<br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2
                                                        -list_formats
                                                        all -i
                                                        /dev/video0<br>
[video4linux2,v4l2 @ 0x556cf63570c0] Compressed:       mjpeg :         
                                                        Motion-JPEG :
                                                        1920x1080
                                                        1600x1200
                                                        1360x768
                                                        1280x1024
                                                        1280x960
                                                        1280x720
                                                        1024x768 800x600
                                                        720x576 720x480
                                                        640x480<br>
[video4linux2,v4l2 @ 0x556cf63570c0] Raw       :     yuyv422 :          
                                                        YUYV 4:2:2 :
                                                        1920x1080
                                                        1600x1200
                                                        1360x768
                                                        1280x1024
                                                        1280x960
                                                        1280x720
                                                        1024x768 800x600
                                                        720x576 720x480
                                                        640x480<br>
                                                        /dev/video0:
                                                        Immediate exit
                                                        requested<br>
                                                        <br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2
                                                        -list_formats
                                                        all -i
                                                        /dev/video1<br>
[video4linux2,v4l2 @ 0x5560c0bc70c0]
ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device<br>
                                                        /dev/video1:
                                                        Inappropriate
                                                        ioctl for device<br>
                                                        ----------------<br>
                                                        <br>
                                                        v4l2-ctl --all<br>
                                                        Driver Info (not
                                                        using libv4l2):<br>
                                                                Driver
                                                        name   :
                                                        uvcvideo<br>
                                                                Card
                                                        type     : USB
                                                        Video: USB Video<br>
                                                                Bus
                                                        info      :
                                                        usb-0000:00:14.0-5<br>
                                                                Driver
                                                        version: 5.14.21<br>
                                                               
                                                        Capabilities  :
                                                        0x84A00001<br>
                                                                       
                                                        Video Capture<br>
                                                                       
                                                        Metadata Capture<br>
                                                                       
                                                        Streaming<br>
                                                                       
                                                        Extended Pix
                                                        Format<br>
                                                                       
                                                        Device
                                                        Capabilities<br>
                                                                Device
                                                        Caps   :
                                                        0x04200001<br>
                                                                       
                                                        Video Capture<br>
                                                                       
                                                        Streaming<br>
                                                                       
                                                        Extended Pix
                                                        Format<br>
                                                        Priority: 2<br>
                                                        Video input : 0
                                                        (Camera 1: ok)<br>
                                                        Format Video
                                                        Capture:<br>
                                                               
                                                        Width/Height     
                                                        : 1920/1080<br>
                                                                Pixel
                                                        Format      :
                                                        'MJPG'<br>
                                                               
                                                        Field            
                                                        : None<br>
                                                                Bytes
                                                        per Line    : 0<br>
                                                                Size
                                                        Image        :
                                                        4147200<br>
                                                               
                                                        Colorspace       
                                                        : sRGB<br>
                                                                Transfer
                                                        Function : Rec.
                                                        709<br>
                                                               
                                                        YCbCr/HSV
                                                        Encoding: ITU-R
                                                        601<br>
                                                               
                                                        Quantization     
                                                        : Default (maps
                                                        to Full Range)<br>
                                                               
                                                        Flags            
                                                        : <br>
                                                        Crop Capability
                                                        Video Capture:<br>
                                                               
                                                        Bounds      :
                                                        Left 0, Top 0,
                                                        Width 1920,
                                                        Height 1080<br>
                                                               
                                                        Default     :
                                                        Left 0, Top 0,
                                                        Width 1920,
                                                        Height 1080<br>
                                                                Pixel
                                                        Aspect: 1/1<br>
                                                        Selection:
                                                        crop_default,
                                                        Left 0, Top 0,
                                                        Width 1920,
                                                        Height 1080<br>
                                                        Selection:
                                                        crop_bounds,
                                                        Left 0, Top 0,
                                                        Width 1920,
                                                        Height 1080<br>
                                                        Streaming
                                                        Parameters Video
                                                        Capture:<br>
                                                               
                                                        Capabilities    
                                                        : timeperframe<br>
                                                                Frames
                                                        per second:
                                                        30.000 (30/1)<br>
                                                                Read
                                                        buffers     : 0<br>
                     brightness 0x00980900 (int)    : min=-128 max=127
                                                        step=1
                                                        default=-11
                                                        value=-11<br>
                       contrast 0x00980901 (int)    : min=0 max=255
                                                        step=1
                                                        default=148
                                                        value=148<br>
                     saturation 0x00980902 (int)    : min=0 max=255
                                                        step=1
                                                        default=180
                                                        value=180<br>
                            hue 0x00980903 (int)    : min=-128 max=127
                                                        step=1 default=0
                                                        value=0<br>
                                                        <br>
-----------------<br>
                                                        <br>
                                                        v4l2-ctl
                                                        --list-formats-ext<br>
                                                        ioctl:
                                                        VIDIOC_ENUM_FMT<br>
                                                               
                                                        Index       : 0<br>
                                                               
                                                        Type        :
                                                        Video Capture<br>
                                                                Pixel
                                                        Format: 'MJPG'
                                                        (compressed)<br>
                                                               
                                                        Name        :
                                                        Motion-JPEG<br>
                                                                       
                                                        Size: Discrete
                                                        1920x1080<br>
                        Interval: Discrete 0.017s (60.000 fps)<br>
                        Interval: Discrete 0.033s (30.000 fps)<br>
                        Interval: Discrete 0.040s (25.000 fps)<br>
                        Interval: Discrete 0.050s (20.000 fps)<br>
                        Interval: Discrete 0.100s (10.000 fps)<br>
                                                                      
                                                        .........<br>
                                                                       
                                                        Size: Discrete
                                                        1280x720<br>
                        Interval: Discrete 0.017s (60.000 fps)<br>
                        Interval: Discrete 0.020s (50.000 fps)<br>
                        Interval: Discrete 0.033s (30.000 fps)<br>
                        Interval: Discrete 0.050s (20.000 fps)<br>
                        Interval: Discrete 0.100s (10.000 fps)<br>
                                                                       
                                                        ......<br>
                                                                       
                                                        Size: Discrete
                                                        720x576<br>
                        Interval: Discrete 0.017s (60.000 fps)<br>
                        Interval: Discrete 0.020s (50.000 fps)<br>
                        Interval: Discrete 0.033s (30.000 fps)<br>
                        Interval: Discrete 0.050s (20.000 fps)<br>
                        Interval: Discrete 0.100s (10.000 fps)<br>
                                                      </font></div>
                                                  </blockquote>
                                                </div>
                                              </div>
                                            </div>
                                          </blockquote>
                                        </div>
                                      </blockquote>
                                    </div>
                                  </div>
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto">well, it seems we know
                                    by now why this device was
                                    ...unexpensive.</div>
                                </div>
                              </blockquote>
                              <br>
                              Yes, I have a "90-days open order" and
                              will start to search for another, better
                              UVC video capture device.<br>
                              The problem is the lack of definitive
                              specifications, compared with my
                              proprietary BMD devices.<br>
                              <br>
                              <blockquote type="cite">
                                <div dir="auto">
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto">it really seems to
                                    report only 5-10 fps at fullHD
                                    uncompresed, anything bigger is
                                    mjpeg ...</div>
                                </div>
                              </blockquote>
                              <br>
                              Type        : Video Capture<br>
                                      Pixel Format: 'YUYV'<br>
                                      Name        : YUYV 4:2:2<br>
                                              Size: Discrete 1920x1080<br>
                                                      Interval: Discrete
                              0.200s (5.000 fps)<br>
                              <br>
                              This can absolutely not be what they
                              promote as:<br>
                              <font face="monospace">"Fluid video
                                recordings without delays or distortions
                                during live streaming, thanks to a
                                picture frequency of 60 Hz and 1080p
                                with Full HD".</font><br>
                              <br>
                              <blockquote type="cite">
                                <div dir="auto"><br>
                                  <div dir="auto"><a href="https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080" rel="noreferrer noreferrer
                                      noreferrer noreferrer noreferrer noreferrer" target="_blank">https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080</a><br>
                                  </div>
                                </div>
                              </blockquote>
                              <br>
                              I also tried that link's suggested syntax<br>
                              <pre><code>ffmpeg -y -t 15 -f video4linux2 -video_size 1920x1080 -input_format nv12 -timestamps abs -use_libv4l2 1 -i /dev/video0 out.mov</code>
</pre>
                              but it didn't work for me, just quitted
                              ffmpeg with<br>
                              <blockquote><font face="monospace">Unrecognized
                                  option 'timestamps'.</font><br>
                                <font face="monospace">Error splitting
                                  the argument list: Option not found</font><br>
                              </blockquote>
                              Looking at ffmpeg man pages at <a href="https://manpages.org/ffmpeg/1" rel="noreferrer noreferrer noreferrer
                                noreferrer noreferrer noreferrer" target="_blank">https://manpages.org/ffmpeg/1</a>
                              there also is a similar video4linux2
                              syntax example<br>
                              <blockquote><font face="monospace">Grab
                                  and record the input of a video4linux2
                                  device, leave the frame rate and size
                                  as previously set:</font><br>
                                <font face="monospace">ffmpeg -f
                                  video4linux2 -input_format mjpeg -i
                                  /dev/video0 out.mpeg</font><br>
                              </blockquote>
                              <ul>
                                <li><font face="monospace">video_size</font></li>
                                <li><font face="monospace">    Set the
                                    video frame size. The argument must
                                    be a string in the form WIDTHxHEIGHT
                                    or a valid size abbreviation. </font></li>
                                <li><font face="monospace">pixel_format</font></li>
                                <li><font face="monospace">    Select
                                    the pixel format (only valid for raw
                                    video input). </font></li>
                                <li><font face="monospace">input_format</font></li>
                                <li><font face="monospace">    Set the
                                    preferred pixel format (for raw
                                    video) or a codec name. This option
                                    allows one to select the input
                                    format, when several are available.
                                  </font></li>
                              </ul>
                              But what should be set as input_format in
                              this case?<br>
                              <br>
                            </div>
                          </blockquote>
                        </div>
                      </div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><span style="color:rgb(80,0,80);font-size:12.8px">YUYV
                          ? (lowercase)</span><br>
                      </div>
                    </div>
                  </blockquote>
                  <font face="Courier New, Courier, monospace"><br>
                    <span style="color:#000000;background-color:#ffffff">ffmpeg
                      -hide_banner -f video4linux2 -input_format yuyv -i
                      /dev/video0 out.mkv </span><br>
                    <span style="color:#ff5fff;background-color:#000000">[video4linux2,v4l2
                      @ 0x55b25017e0c0] </span><span style="color:#ff0000;background-color:#000000">No
                      such input format: yuyv.</span><span style="color:#000000;background-color:#ffffff"> </span><br>
                    <span style="color:#ff0000;background-color:#000000">/dev/video0:
                      Invalid argument                </span><br>
                  </font></div>
              </blockquote>
            </div>
          </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">:(</div>
        </div>
      </blockquote>
    </blockquote>
    <br>
    Yes, 'yuyv422' at least not returned any errors, but just verified 5
    fps from the encoded file<br>
    <br>
    ffmpeg -hide_banner -f video4linux2 -input_format yuyv422 -i
    /dev/video0 out.mkv<br>
    <br>
    ffprobe -hide_banner out.mkv<br>
    Input #0, matroska,webm, from 'out.mkv':<br>
      Metadata:<br>
        ENCODER         : Lavf58.76.100<br>
      Duration: 00:00:12.40, start: 0.000000, bitrate: 2 kb/s<br>
      Stream #0:0: Video: vp9 (Profile 1), yuv422p(tv, progressive),
    1920x1080, 5 fps, 5 tbr, 1k tbn, 1k tbc (default)<br>
        Metadata:<br>
          ENCODER         : Lavc58.134.100 libvpx-vp9<br>
          DURATION        : 00:00:12.400000000<br>
    <br>
    Any idea why the audio:0kB from  '-codec:a pcm_s16le' disappeared in
    the encoded files?<br>
    <br>
    <font face="monospace">inxi -GA<br>
      Graphics:  Device-1: NVIDIA GK208B [GeForce GT 730] driver:
      nouveau v: kernel<br>
                 Device-2: Microdia Camera type: USB driver:
      snd-usb-audio,uvcvideo<br>
                 Device-3: MacroSilicon USB Video type: USB driver:
      hid-generic,snd-usb-audio,usbhid,uvcvideo<br>
                 Display: server: SUSE LINUX 1.20.3 driver: loaded:
      nouveau unloaded: fbdev,modesetting,vesa<br>
                 resolution: 2560x1440~60Hz<br>
                 OpenGL: renderer: llvmpipe (LLVM 11.0.1 256 bits) v:
      4.5 Mesa 21.2.4<br>
      Audio:     Device-1: Intel 100 Series/C230 Series Family HD Audio
      driver: snd_hda_intel<br>
                 Device-2: NVIDIA GK208 HDMI/DP Audio driver:
      snd_hda_intel<br>
                 Device-3: Microdia Camera type: USB driver:
      snd-usb-audio,uvcvideo<br>
                 Device-4: MacroSilicon USB Video type: USB driver:
      hid-generic,snd-usb-audio,usbhid,uvcvideo<br>
                 Sound Server-1: ALSA v: k5.14.21-150400.24.41-default
      running: yes<br>
                 Sound Server-2: PulseAudio v: 15.0 running: yes<br>
                 Sound Server-3: PipeWire v: 0.3.49 running: yes</font></div><div dir="auto"><font face="monospace"></font></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">I think for audio you need few more alsa switches:</div><div dir="auto"><br></div><div dir="auto"><a href="https://askubuntu.com/questions/1451630/hdmi-capture-card-macrosilicon-ms2109-missing-audio-device-on-ubuntu-22-04">https://askubuntu.com/questions/1451630/hdmi-capture-card-macrosilicon-ms2109-missing-audio-device-on-ubuntu-22-04</a><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">something like this but find/use your own alsa device :)</div><div dir="auto"><br></div><div dir="auto">for laughs you can try cingg's internal v4l2 capture</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><font face="monospace"><br></font>
    <br>
    <br>
    <blockquote type="cite">
      <blockquote type="cite">
        <div dir="auto">
          <div dir="auto"><br>
          </div>
          <div dir="auto">sorry, may be ask on ffmpeg support channel
            then?</div>
          <div dir="auto"><br>
          </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">p.s. fake 1080@60 usb dongles def. exist, made
            me sad</div>
          <div dir="auto"><br>
          </div>
          <div dir="auto"><a href="https://www.naut.ca/blog/2020/07/09/cheap-hdmi-capture-card-review/" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.naut.ca/blog/2020/07/09/cheap-hdmi-capture-card-review/</a><br>
          </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">p.p.s may be try to contact this person so you
            can confirm/deny exact chip (set) in this device, or at very
            minimum  confirm it based on something else?</div>
          <div dir="auto"><br>
          </div>
          <div dir="auto"><a href="https://github.com/BertoldVdb/ms-tools" rel="noreferrer noreferrer noreferrer" target="_blank">https://github.com/BertoldVdb/ms-tools</a><br>
          </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto"> "Program, library and reference designs to
            develop for MacroSilicon MS2106/MS2109/MS2130 chips."</div>
        </div>
      </blockquote>
      <br>
      Interesting stuff. Mat in a previous thread referred to a couple
      of other links (article test)<br>
      <a href="https://lists.cinelerra-gg.org/pipermail/cin/2021-October/003960.html" rel="noreferrer noreferrer" target="_blank">https://lists.cinelerra-gg.org/pipermail/cin/2021-October/003960.html</a><br>
      <br>
       <br>
      <blockquote type="cite">
        <div dir="auto">
          <div dir="auto"><br>
          </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">
            <div class="gmail_quote">
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div><br>
                  <br>
                  <br>
                  <br>
                  <blockquote type="cite">
                    <div dir="auto">
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto">
                        <div class="gmail_quote">
                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                            <div><br>
                              <br>
                              <blockquote type="cite">
                                <div dir="auto">
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto"><br>
                                  </div>
                                  <div dir="auto">
                                    <div class="gmail_quote">
                                      <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                        <div>
                                          <blockquote type="cite">
                                            <div dir="auto">
                                              <div dir="auto">
                                                <div class="gmail_quote">
                                                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                    <div><font face="monospace">
                                                                       
                                                        <br>
                                                               
                                                        Index       : 1<br>
                                                               
                                                        Type        :
                                                        Video Capture<br>
                                                                Pixel
                                                        Format: 'YUYV'<br>
                                                               
                                                        Name        :
                                                        YUYV 4:2:2<br>
                                                                       
                                                        Size: Discrete
                                                        1920x1080<br>
                        Interval: Discrete 0.200s (5.000 fps)<br>
                                                                       
                                                        ......<br>
                                                                       
                                                        Size: Discrete
                                                        1280x720<br>
                        Interval: Discrete 0.100s (10.000 fps)<br>
                                                                       
                                                        .......<br>
                                                                       
                                                        Size: Discrete
                                                        720x576<br>
                        Interval: Discrete 0.040s (25.000 fps)<br>
                        Interval: Discrete 0.050s (20.000 fps)<br>
                        Interval: Discrete 0.100s (10.000 fps)<br>
                        Interval: Discrete 0.200s (5.000 fps)<br>
                                                                       
                                                        .........<br>
                                                        <br>
                                                        Encoding:<br>
                                                        --------<br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2 -framerate
                                                        25 -video_size
                                                        720x576 -i
                                                        /dev/video0
                                                        -codec:v ffv1
                                                        -codec:a
                                                        pcm_s16le -f
                                                        matroska
                                                        720x576_ffv1.mkv<br>
                                                        <br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2 -framerate
                                                        25 -video_size
                                                        1280x720 -i
                                                        /dev/video0
                                                        -codec:v ffv1
                                                        -codec:a
                                                        pcm_s16le -f
                                                        matroska
                                                        1280x720_ffv1.mkv<br>
[video4linux2,v4l2 @ 0x559d031190c0] The driver changed the time per
                                                        frame from 1/25
                                                        to 1/10<br>
                                                        <br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2 -framerate
                                                        25 -video_size
                                                        1920x1080 -i
                                                        /dev/video0
                                                        -codec:v ffv1
                                                        -codec:a
                                                        pcm_s16le -f
                                                        matroska
                                                        1920x1080_ffv1.mkv<br>
[video4linux2,v4l2 @ 0x55ce18d060c0] The driver changed the time per
                                                        frame from 1/25
                                                        to 1/5<br>
                                                        <br>
                                                        ffmpeg
                                                        -hide_banner -f
                                                        v4l2 -framerate
                                                        25 -video_size
                                                        1920x1080 -i
                                                        /dev/video0
                                                        -codec:v v210
                                                        -codec:a
                                                        pcm_s16le -f
                                                        matroska
                                                        1920x1080_v210.mkv<br>
[video4linux2,v4l2 @ 0x55944900e0c0] The driver changed the time per
                                                        frame from 1/25
                                                        to 1/5<br>
                                                        <br>
                                                        <br>
                                                        Recorded test
                                                        video files and
                                                        probing formats:<br>
---------------------------------------------<br>
                                                        <br>
                                                        du -sh *<br>
                                                        258M   
                                                        1280x720_ffv1.mkv<br>
                                                        292M   
                                                        1920x1080_ffv1.mkv<br>
                                                        1,1G   
                                                        1920x1080_v210.mkv<br>
                                                        61M    
                                                        720x576_ffv1.mkv<br>
-----------------------------<br>
                                                        <br>
                                                        <br>
                                                        ffprobe
                                                        -hide_banner
                                                        720x576_ffv1.mkv<br>
                                                        Input #0,
                                                        matroska,webm,
                                                        from
                                                        '720x576_ffv1.mkv':<br>
                                                          Metadata:<br>
                                                           
                                                        ENCODER        
                                                        : Lavf58.76.100<br>
                                                          Duration:
                                                        00:00:09.20,
                                                        start: 0.000000,
                                                        bitrate: 55385
                                                        kb/s<br>
                                                          Stream #0:0:
                                                        Video: ffv1
                                                        (FFV1 /
                                                        0x31564646),
                                                        yuv422p(tv,
                                                        progressive),
                                                        720x576, 25 fps,
                                                        25 tbr, 1k tbn,
                                                        1k tbc (default)<br>
                                                            Metadata:<br>
                                                             
                                                        ENCODER        
                                                        : Lavc58.134.100
                                                        ffv1<br>
                                                             
                                                        DURATION       
                                                        :
                                                        00:00:09.200000000<br>
                                                        -----------<br>
                                                        <br>
                                                        ffprobe
                                                        -hide_banner
                                                        1280x720_ffv1.mkv<br>
                                                        Input #0,
                                                        matroska,webm,
                                                        from
                                                        '1280x720_ffv1.mkv':<br>
                                                          Metadata:<br>
                                                           
                                                        ENCODER        
                                                        : Lavf58.76.100<br>
                                                          Duration:
                                                        00:00:38.90,
                                                        start: 0.000000,
                                                        bitrate: 55512
                                                        kb/s<br>
                                                          Stream #0:0:
                                                        Video: ffv1
                                                        (FFV1 /
                                                        0x31564646),
                                                        yuv422p(tv,
                                                        progressive),
                                                        1280x720, 10
                                                        fps, 10 tbr, 1k
                                                        tbn, 1k tbc
                                                        (default)<br>
                                                            Metadata:<br>
                                                             
                                                        ENCODER        
                                                        : Lavc58.134.100
                                                        ffv1<br>
                                                             
                                                        DURATION       
                                                        :
                                                        00:00:38.900000000<br>
                                                        --------------<br>
                                                        <br>
                                                        ffprobe
                                                        -hide_banner
                                                        1920x1080_ffv1.mkv<br>
                                                        Input #0,
                                                        matroska,webm,
                                                        from
                                                        '1920x1080_ffv1.mkv':<br>
                                                          Metadata:<br>
                                                           
                                                        ENCODER        
                                                        : Lavf58.76.100<br>
                                                          Duration:
                                                        00:00:53.40,
                                                        start: 0.000000,
                                                        bitrate: 45747
                                                        kb/s<br>
                                                          Stream #0:0:
                                                        Video: ffv1
                                                        (FFV1 /
                                                        0x31564646),
                                                        yuv422p(tv,
                                                        progressive),
                                                        1920x1080, 5
                                                        fps, 5 tbr, 1k
                                                        tbn, 1k tbc
                                                        (default)<br>
                                                            Metadata:<br>
                                                             
                                                        ENCODER        
                                                        : Lavc58.134.100
                                                        ffv1<br>
                                                             
                                                        DURATION       
                                                        :
                                                        00:00:53.400000000<br>
                                                        ----------------<br>
                                                        <br>
                                                        ffprobe
                                                        -hide_banner
                                                        1920x1080_v210.mkv<br>
                                                        [matroska,webm @
                                                        0x5563ca6d30c0]
                                                        Stream #0: not
                                                        enough frames to
                                                        estimate rate;
                                                        consider
                                                        increasing
                                                        probesize<br>
                                                        Input #0,
                                                        matroska,webm,
                                                        from
                                                        '1920x1080_v210.mkv':<br>
                                                          Metadata:<br>
                                                           
                                                        ENCODER        
                                                        : Lavf58.76.100<br>
                                                          Duration:
                                                        00:00:41.40,
                                                        start: 0.000000,
                                                        bitrate: 221185
                                                        kb/s<br>
                                                          Stream #0:0:
                                                        Video: v210
                                                        (v210 /
                                                        0x30313276),
                                                        yuv422p10le(tv,
                                                        progressive),
                                                        1920x1080, 5
                                                        fps, 1k tbr, 1k
                                                        tbn, 1k tbc
                                                        (default)<br>
                                                            Metadata:<br>
                                                             
                                                        ENCODER        
                                                        : Lavc58.134.100
                                                        v210<br>
                                                             
                                                        DURATION       
                                                        :
                                                        00:00:41.400000000<br>
                                                              <br>
---------------------------<br>
                      <br>
                                                      </font><br>
                                                      <blockquote type="cite">
                                                        <ul>
                                                        </ul>
                                                        <font face="Courier
                                                          New, Courier,
                                                          monospace"><br>
                                                          2) Scart AV SV
                                                          to HDMI
                                                          Converter
                                                          Switcher S
                                                          Video
                                                          Composite RCA
                                                          DVD HD TV
                                                          adapter (3-4
                                                          weeks delivery
                                                          time <br>
                                                          <a href="https://www.ebay.com.au/itm/295472602625" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.ebay.com.au/itm/295472602625</a><br>
                                                        </font>
                                                        <ul>
                                                          <li><font face="Courier
                                                          New, Courier,
                                                          monospace">The
                                                          3-in-1
                                                          S-/video/RCA/SCART
                                                          to HDMI
                                                          converter is a
                                                          universal
                                                          converter for
                                                          analog video
                                                          input to HDMI
                                                          output. </font></li>
                                                          <li><font face="Courier
                                                          New, Courier,
                                                          monospace">Analog
                                                          to digital
                                                          converter
                                                          (ADC), 10 bits
                                                          maximum 1,62
                                                          MSPS sampling,
                                                          </font></li>
                                                        </ul>
                                                        <font face="Courier
                                                          New, Courier,
                                                          monospace"><br>
                                                          <br>
                                                          Q I have not
                                                          yet found a
                                                          definitiv
                                                          ffmpeg FFV1 v
                                                          3 syntax guide
                                                          for SD and HDV
                                                          capturing and
                                                          hope for
                                                          suggestions
                                                          and comments
                                                          here!?<br>
                                                          <br>
                                                          3.1 FFmpeg
                                                          recipe (PAL)<br>
                                                        </font>
                                                        <blockquote><font face="Courier
                                                          New, Courier,
                                                          monospace">ffmpeg
                                                          -i VIDEO_IN \</font><br>
                                                          <blockquote><font face="Courier
                                                          New, Courier,
                                                          monospace">-c:v
                                                          ffv1 -level 3
                                                          -coder 1
                                                          -context 0
                                                          -slices 24
                                                          -slicecrc 1 \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-color_primaries
                                                          bt470bg \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-color_trc
                                                          bt709 \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-colorspace
                                                          bt470bg \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-color_range
                                                          mpeg \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-map
                                                          0 \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-top
                                                          1 \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-c:a
                                                          copy \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">-g
                                                          1 -pix_fmt + \</font><br>
                                                          <font face="Courier
                                                          New, Courier,
                                                          monospace">VIDEO_OUT.mkv</font><br>
                                                          </blockquote>
                                                        </blockquote>
                                                        <font face="Courier
                                                          New, Courier,
                                                          monospace"><br>
                                                          3.2 Reference
                                                          Example<br>
                                                          <a href="https://trac.ffmpeg.org/wiki/Encode/FFV1" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://trac.ffmpeg.org/wiki/Encode/FFV1</a><br>
                                                          <br>
                                                              Copy audio
                                                          "as-is" and
                                                          use FFV1.3 as
                                                          video codec. <br>
                                                          <br>
                                                              Parameters
                                                          are 8 threads,
                                                          coder=1,
                                                          context=1,
                                                          GOP-size=1, 24
                                                          slices and
                                                          slice-CRC on:<br>
                                                          <br>
                                                              ffmpeg -i
<input_video>     \<br>
                                                                 
                                                          -acodec  
                                                          copy         
                                                          \<br>
                                                                 
                                                          -vcodec   ffv1
                                                          -level 3 \<br>
                                                                 
                                                          -threads 
                                                          8            
                                                          \<br>
                                                                 
                                                          -coder   
                                                          1            
                                                          \<br>
                                                                 
                                                          -context 
                                                          1            
                                                          \<br>
                                                                 
                                                          -g       
                                                          1            
                                                          \<br>
                                                                 
                                                          -slices 
                                                          24            
                                                          \<br>
                                                                 
                                                          -slicecrc
                                                          1            
                                                          \<br>
                                                                 
                                                          <output_video><br>
                                                          <br>
                                                          <br>
                                                          3.3 Various
                                                          Encoding
                                                          examples for
                                                          Video capture
                                                          from USB
</font></blockquote></div></blockquote></div></div></div></blockquote></div></blockquote></div></div></div></blockquote></div></blockquote></div></div></div></blockquote></div></blockquote></div></div></div></blockquote></blockquote></div></blockquote></div></div></div>