<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <br>
    <br>
    <div class="moz-cite-prefix">Den 08.02.2023 00:52, skrev Andrew
      Randrianasulu:<br>
    </div>
    <blockquote type="cite"
cite="mid:CA+rFky5GqFm3=AUbY4H96bwU_fxbEVvA5zJJiqVX2bkaUstTrw@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <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"
                moz-do-not-send="true" class="moz-txt-link-freetext">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"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">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 class="moz-txt-link-freetext" href="https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080">https://superuser.com/questions/1449252/ffmpeg-captures-from-uvc-dev-video0-in-any-resolution-except-for-1920x1080</a><br>
    <br>
    <blockquote type="cite"
cite="mid:CA+rFky5GqFm3=AUbY4H96bwU_fxbEVvA5zJJiqVX2bkaUstTrw@mail.gmail.com">
      <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"
cite="mid:CA+rFky5GqFm3=AUbY4H96bwU_fxbEVvA5zJJiqVX2bkaUstTrw@mail.gmail.com">
      <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>
                                  <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"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">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"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">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 camera /dev/video0:<br>
                    <br>
                    ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i
                    /dev/video0 output_data.mkv<br>
                    <br>
                    ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i
                    /dev/video0 -codec:v ffv1 -codec:a pcm_s16le \<br>
                        -f matroska  output_video.mkv<br>
                    <br>
                    Check that video is captured properly using ffplay:<br>
                    <br>
                    ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i
                    $AUDIO \<br>
                        -r 25 -thread_queue_size 1024 -i $VIDEO \<br>
                        -codec copy -f matroska  - | ffplay -<br>
                  </font><font face="Courier"><span><br>
                    </span></font><font face="Courier New, Courier,
                    monospace"><span>Check the overall flow using ffplay
                      before capturing:</span> </font>
                  <div>
                    <div> <br>
                    </div>
                  </div>
                  <font face="Courier New, Courier, monospace">ffmpeg
                    -ar 44100 -thread_queue_size 1024 -f alsa -i $AUDIO
                    \<br>
                        -itsoffset -0.5 -r 25 -thread_queue_size 1024 -i
                    $VIDEO \<br>
                        -filter_complex 'channelmap=FL-0'
                    -filter_complex 'crop=w=700:h=556:x=8:y=0' \<br>
                        -map 1:v  -map 0:a -codec:v ffv1 -codec:a
                    pcm_s16le \<br>
                        -f matroska  - | ffplay -<br>
                    <br>
                    <br>
                    <br>
                    4, Regarding FFV1 lossless compression in realtime<br>
                  </font><font face="Courier New, Courier, monospace"><font
                      face="Courier New, Courier, monospace">Comparison
                      tests (2013/2015) have shown that FFV1 produced
                      the smallest files at the fastest speed. It can be
                      used to capture SD material in realtime, and HD
                      possibly, too. </font></font><font face="Courier
                    New, Courier, monospace"><font face="Courier New,
                      Courier, monospace"><font face="Courier New,
                        Courier, monospace">This according to a
                        2012/2015 article, where I have extracted the
                        results for FFV1 v.3 in the tables below:<br>
                        <br>
                        <a
href="http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_tests"
                          target="_blank" rel="noreferrer"
                          moz-do-not-send="true"
                          class="moz-txt-link-freetext">http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_tests</a><br>
                      </font> </font></font> NOTE: This is a consumer
                  grade, off-the-shelf PC setup.<br>
                  <br>
                  <table>
                    <tbody>
                      <tr>
                        <th colspan="2">Hardware:</th>
                      </tr>
                      <tr>
                        <td>CPU:</td>
                        <td>Intel(R) QuadCore(TM) i7-2600K CPU @ 3.40GHz</td>
                      </tr>
                      <tr>
                        <td>RAM:</td>
                        <td>8 GB</td>
                      </tr>
                      <tr>
                        <td>Disk:</td>
                        <td>Intel SSDSA2CW080G3 (SSD)</td>
                      </tr>
                      <tr>
                        <th colspan="2">Software:</th>
                      </tr>
                      <tr>
                        <td>Operating System:</td>
                        <td>GNU/Linux (Xubuntu 12.04.1, 64bit)</td>
                      </tr>
                      <tr>
                        <td>Transcoding tool:</td>
                        <td>FFmpeg (version git N-59183-g3e62654, Dec 17
                          2013)</td>
                      </tr>
                    </tbody>
                  </table>
                  <br>
                  <table>
                    <tbody>
                      <tr>
                        <td>Video source file:</td>
                        <td colspan="6"> <a
                            href="http://media.xiph.org/video/derf/y4m/football_422_ntsc.y4m"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">VQEG reference video
                            "football"</a> (NTSC-SD, 720x486px, 30fps,
                          yuv422p, 8bpc) </td>
                      </tr>
                      <tr>
                        <th>Codec</th>
                        <th>Encoding</th>
                        <th>Decoding</th>
                        <th>Filesize</th>
                        <th>% of uncompressed</th>
                        <th>Implementation</th>
                        <th>Details</th>
                      </tr>
                      <tr>
                        <td><a
href="http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_ffv1"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">FFV1</a> (version 3)</td>
                        <td>216 fps</td>
                        <td>277 fps</td>
                        <td>111 MiB</td>
                        <td>46.1%</td>
                        <td><a
                            href="http://en.wikipedia.org/wiki/Libavcodec"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">libavcodec (FFmpeg)</a></td>
                        <td> <a
href="http://www.av-rd.com/knowhow/video/test_results/football-720x486i30/ffv1.3-libavcodec_ffmpeg_avi.log"
                            type="text/plain" target="_blank"
                            rel="noreferrer" moz-do-not-send="true">log</a>,
                          <a
href="http://www.av-rd.com/knowhow/video/test_results/football-720x486i30/ffv1.3-libavcodec_ffmpeg_avi.framemd5"
                            type="text/plain" target="_blank"
                            rel="noreferrer" moz-do-not-send="true">framemd5</a></td>
                      </tr>
                    </tbody>
                  </table>
                  <font face="Courier New, Courier, monospace"> <br>
                  </font><br>
                  <table>
                    <tbody>
                      <tr>
                        <td>Video source file:</td>
                        <td colspan="6"> <a
                            href="http://media.xiph.org/video/derf/y4m/park_joy_1080p50.y4m"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">SVT reference video
                            "park joy"</a> (full-HD/1080p, 1920x1080px,
                          50fps, yuv420p, 8bpc) </td>
                      </tr>
                      <tr>
                        <th>Codec</th>
                        <th>Encoding</th>
                        <th>Decoding</th>
                        <th>Filesize</th>
                        <th>% of uncompressed</th>
                        <th>Implementation</th>
                        <th>Details</th>
                      </tr>
                      <tr>
                        <td><a
href="http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_ffv1"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">FFV1</a> (version 3)</td>
                        <td>31 fps</td>
                        <td>63 fps</td>
                        <td>879 MiB</td>
                        <td>57.2%</td>
                        <td><a
                            href="http://en.wikipedia.org/wiki/Libavcodec"
                            target="_blank" rel="noreferrer"
                            moz-do-not-send="true">libavcodec (FFmpeg)</a></td>
                        <td> <a
href="http://www.av-rd.com/knowhow/video/test_results/park_joy-1920x1080p50/ffv1.3-libavcodec_ffmpeg_avi.log"
                            type="text/plain" target="_blank"
                            rel="noreferrer" moz-do-not-send="true">log</a>,
                          <a
href="http://www.av-rd.com/knowhow/video/test_results/park_joy-1920x1080p50/ffv1.3-libavcodec_ffmpeg_avi.framemd5"
                            type="text/plain" target="_blank"
                            rel="noreferrer" moz-do-not-send="true">framemd5</a></td>
                      </tr>
                    </tbody>
                  </table>
                  <font face="Courier New, Courier, monospace"> <br>
                    <br>
                  </font><br>
                  <font face="Courier New, Courier, monospace"><font
                      face="Courier New, Courier, monospace"><font
                        face="Courier New, Courier, monospace"><font
                          face="Courier New, Courier, monospace">PAL-SD
                          720x576 </font><font face="Courier New,
                          Courier, monospace">stored as YUV422</font><font
                          face="Courier New, Courier, monospace">, 10
                          bpc (bits per component), instead of the
                          tested 8 bpc above, seems to me would have
                          enlarged the the filesizes with about 25%, or
                          to about 40 GB/hr with FFV1 lossless
                          compressed. </font></font></font><br>
                    <br>
                    Although the FFV1 compression results above
                    obviously used yuv422p, 8bps source SD and FHD files
                    as input, it seems for me that the encoding speeds
                    at 216 fps and 31 fps for SD and FHD respectively,
                    assumingly should manage realtime FFV1 encoding and
                    streaming of PAL SD and HDV at 25 fps as well,
                    especially with a faster i7-6700 x 8 cpu. Comments
                    here?<br>
                    <br>
                    <br>
                    5. Related 2021-[Cin] threads as background
                    references<br>
                    <br>
                    [Cin] hdmi capture card (with v4l2)<br>
                    <a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02865.html"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02865.html</a><br>
                    <br>
                    [Cin] offtopic: Digitize and record Video with A/D
                    USB adapters<br>
                    <a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03269.html"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03269.html</a><br>
                    <br>
                    [Cin] offtopic: HDMI capture<br>
                    <a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02084.html"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02084.html</a><br>
                    <br>
                    [Cin] Is SD and HD 422 Video Capture obtainable with
                    V4L(2)?<br>
                    <a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03719.html"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03719.html</a><br>
                    <br>
                    [Cin] Uncompressed video to lossless compression
                    FFV1/MKV<br>
                    <a
href="https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html"
                      target="_blank" rel="noreferrer"
                      moz-do-not-send="true"
                      class="moz-txt-link-freetext">https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html</a><br>
                  </font> </blockquote>
                <br>
              </div>
              -- <br>
              Cin mailing list<br>
              <a href="mailto:Cin@lists.cinelerra-gg.org"
                target="_blank" rel="noreferrer" moz-do-not-send="true"
                class="moz-txt-link-freetext">Cin@lists.cinelerra-gg.org</a><br>
              <a
                href="https://lists.cinelerra-gg.org/mailman/listinfo/cin"
                rel="noreferrer noreferrer" target="_blank"
                moz-do-not-send="true" class="moz-txt-link-freetext">https://lists.cinelerra-gg.org/mailman/listinfo/cin</a><br>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </body>
</html>