Den 02.02.2023 01:46, skrev Terje J. Hanssen:
.......

but I prepare myself to test and use one method left with regards to "Personal Video Archiving".

Therefore I have ordered two selected, inexpensive devices (the urls here are just for English language):

1) Capture Card USB HDMI 4K to 1080P USB-C adapter (Speedy USB 3.2/3.1/3.0, 60 Hz and 1080p FHD.)
https://www.turascandinavia.com/en/products/computer/microphone-webcam/webcams/74257

Then the first item, Hama Video Recording Stick, HDMI 4k - USB3.x is received. It promises:
"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".

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.

But according to Steve Mullen's V1 and FX7 handbook (not mentioned in the manual):
1. When the camera is operating, the EIP (Enhanced Image Processor) generates uncompressed 1440x1080i with a 4:2:2 color space. 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.

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
chip downscales 1440 to 1280 while it up-scales 540 to 720. The result is 720p50 or 720p60, which is output via HDMI.
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.

Someone here that have suggestion to possibly modified syntax or can verify that the driver doesn't manage this?

Another (setup) problem, there was no audio recorded or heard during playback!?

In the following I list the test command syntax I've collectedf and tried with shortened output (yet long):
To explain, I have also another USB 2.0 Webcam connected, beside the new HDMI-USB3 Videstick.

Verify the devices, drivers and formats:
---------------------------------------
dmesg | tail
[22706.060759] perf: interrupt took too long (2521 > 2500), lowering kernel.perf_event_max_sample_rate to 79250
[32105.561575] perf: interrupt took too long (3158 > 3151), lowering kernel.perf_event_max_sample_rate to 63250
[40586.477420] usb 1-5: USB disconnect, device number 2
[40599.099612] usb 1-5: new high-speed USB device number 5 using xhci_hcd
[40599.250960] usb 1-5: New USB device found, idVendor=534d, idProduct=2109, bcdDevice=21.00
[40599.250972] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[40599.250978] usb 1-5: Product: USB Video
[40599.250984] usb 1-5: Manufacturer: MACROSILICON
[40599.252310] usb 1-5: Found UVC 1.00 device USB Video (534d:2109)
[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
-----------------------------

lsusb
Bus 002 Device 003: ID 05e3:0732 Genesys Logic, Inc. All-in-One Cardreader
Bus 002 Device 002: ID 0bc2:2038 Seagate RSS LLC Expansion HDD
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 005: ID 534d:2109 MacroSilicon USB Video
Bus 001 Device 004: ID 0c45:6340 Microdia Camera
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


udevadm info  /dev/video* | egrep 'DEVNAME|ID_V4L_PRODUCT'
E: DEVNAME=/dev/video0
E: ID_V4L_PRODUCT=USB Video: USB Video
E: DEVNAME=/dev/video1
E: ID_V4L_PRODUCT=USB Video: USB Video
E: DEVNAME=/dev/video2
E: ID_V4L_PRODUCT=USB 2.0 Camera: HD 720P Webcam
E: DEVNAME=/dev/video3
E: ID_V4L_PRODUCT=USB 2.0 Camera: HD 720P Webcam

lsusb | egrep 'Video|Camera'
Bus 001 Device 005: ID 534d:2109 MacroSilicon USB Video
Bus 001 Device 004: ID 0c45:6340 Microdia Camera

--------------------

ll /dev/video*
crw-rw----+ 1 root video 81, 0 feb.   7 20:22 /dev/video0
crw-rw----+ 1 root video 81, 1 feb.   7 20:22 /dev/video1
crw-rw----+ 1 root video 81, 2 feb.   7 09:05 /dev/video2
crw-rw----+ 1 root video 81, 3 feb.   7 09:05 /dev/video3

-----------------------

v4l2-ctl --list-devices
USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11):
        /dev/video2
        /dev/video3

USB Video: USB Video (usb-0000:00:14.0-5):
        /dev/video0
        /dev/video1

-------------------------

ffmpeg -f v4l2 -list_formats all -i /dev/video0
ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0
[video4linux2,v4l2 @ 0x556cf63570c0] Compressed:       mjpeg :          Motion-JPEG : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480
[video4linux2,v4l2 @ 0x556cf63570c0] Raw       :     yuyv422 :           YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480
/dev/video0: Immediate exit requested

ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1
[video4linux2,v4l2 @ 0x5560c0bc70c0] ioctl(VIDIOC_G_INPUT): Inappropriate ioctl for device
/dev/video1: Inappropriate ioctl for device
----------------

v4l2-ctl --all
Driver Info (not using libv4l2):
        Driver name   : uvcvideo
        Card type     : USB Video: USB Video
        Bus info      : usb-0000:00:14.0-5
        Driver version: 5.14.21
        Capabilities  : 0x84A00001
                Video Capture
                Metadata Capture
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x04200001
                Video Capture
                Streaming
                Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
        Width/Height      : 1920/1080
        Pixel Format      : 'MJPG'
        Field             : None
        Bytes per Line    : 0
        Size Image        : 4147200
        Colorspace        : sRGB
        Transfer Function : Rec. 709
        YCbCr/HSV Encoding: ITU-R 601
        Quantization      : Default (maps to Full Range)
        Flags             :
Crop Capability Video Capture:
        Bounds      : Left 0, Top 0, Width 1920, Height 1080
        Default     : Left 0, Top 0, Width 1920, Height 1080
        Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 1920, Height 1080
Selection: crop_bounds, Left 0, Top 0, Width 1920, Height 1080
Streaming Parameters Video Capture:
        Capabilities     : timeperframe
        Frames per second: 30.000 (30/1)
        Read buffers     : 0
                     brightness 0x00980900 (int)    : min=-128 max=127 step=1 default=-11 value=-11
                       contrast 0x00980901 (int)    : min=0 max=255 step=1 default=148 value=148
                     saturation 0x00980902 (int)    : min=0 max=255 step=1 default=180 value=180
                            hue 0x00980903 (int)    : min=-128 max=127 step=1 default=0 value=0

-----------------

v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
        Index       : 0
        Type        : Video Capture
        Pixel Format: 'MJPG' (compressed)
        Name        : Motion-JPEG
                Size: Discrete 1920x1080
                        Interval: Discrete 0.017s (60.000 fps)
                        Interval: Discrete 0.033s (30.000 fps)
                        Interval: Discrete 0.040s (25.000 fps)
                        Interval: Discrete 0.050s (20.000 fps)
                        Interval: Discrete 0.100s (10.000 fps)
               .........
                Size: Discrete 1280x720
                        Interval: Discrete 0.017s (60.000 fps)
                        Interval: Discrete 0.020s (50.000 fps)
                        Interval: Discrete 0.033s (30.000 fps)
                        Interval: Discrete 0.050s (20.000 fps)
                        Interval: Discrete 0.100s (10.000 fps)
                ......
                Size: Discrete 720x576
                        Interval: Discrete 0.017s (60.000 fps)
                        Interval: Discrete 0.020s (50.000 fps)
                        Interval: Discrete 0.033s (30.000 fps)
                        Interval: Discrete 0.050s (20.000 fps)
                        Interval: Discrete 0.100s (10.000 fps)
               
        Index       : 1
        Type        : Video Capture
        Pixel Format: 'YUYV'
        Name        : YUYV 4:2:2
                Size: Discrete 1920x1080
                        Interval: Discrete 0.200s (5.000 fps)
                ......
                Size: Discrete 1280x720
                        Interval: Discrete 0.100s (10.000 fps)
                .......
                Size: Discrete 720x576
                        Interval: Discrete 0.040s (25.000 fps)
                        Interval: Discrete 0.050s (20.000 fps)
                        Interval: Discrete 0.100s (10.000 fps)
                        Interval: Discrete 0.200s (5.000 fps)
                .........

Encoding:
--------
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

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
[video4linux2,v4l2 @ 0x559d031190c0] The driver changed the time per frame from 1/25 to 1/10

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
[video4linux2,v4l2 @ 0x55ce18d060c0] The driver changed the time per frame from 1/25 to 1/5

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
[video4linux2,v4l2 @ 0x55944900e0c0] The driver changed the time per frame from 1/25 to 1/5


Recorded test video files and probing formats:
---------------------------------------------

du -sh *
258M    1280x720_ffv1.mkv
292M    1920x1080_ffv1.mkv
1,1G    1920x1080_v210.mkv
61M     720x576_ffv1.mkv
-----------------------------


ffprobe -hide_banner 720x576_ffv1.mkv
Input #0, matroska,webm, from '720x576_ffv1.mkv':
  Metadata:
    ENCODER         : Lavf58.76.100
  Duration: 00:00:09.20, start: 0.000000, bitrate: 55385 kb/s
  Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv, progressive), 720x576, 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc58.134.100 ffv1
      DURATION        : 00:00:09.200000000
-----------

ffprobe -hide_banner 1280x720_ffv1.mkv
Input #0, matroska,webm, from '1280x720_ffv1.mkv':
  Metadata:
    ENCODER         : Lavf58.76.100
  Duration: 00:00:38.90, start: 0.000000, bitrate: 55512 kb/s
  Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv, progressive), 1280x720, 10 fps, 10 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc58.134.100 ffv1
      DURATION        : 00:00:38.900000000
--------------

ffprobe -hide_banner 1920x1080_ffv1.mkv
Input #0, matroska,webm, from '1920x1080_ffv1.mkv':
  Metadata:
    ENCODER         : Lavf58.76.100
  Duration: 00:00:53.40, start: 0.000000, bitrate: 45747 kb/s
  Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p(tv, progressive), 1920x1080, 5 fps, 5 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc58.134.100 ffv1
      DURATION        : 00:00:53.400000000
----------------

ffprobe -hide_banner 1920x1080_v210.mkv
[matroska,webm @ 0x5563ca6d30c0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, matroska,webm, from '1920x1080_v210.mkv':
  Metadata:
    ENCODER         : Lavf58.76.100
  Duration: 00:00:41.40, start: 0.000000, bitrate: 221185 kb/s
  Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le(tv, progressive), 1920x1080, 5 fps, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ENCODER         : Lavc58.134.100 v210
      DURATION        : 00:00:41.400000000
      
---------------------------
                      


2) Scart AV SV to HDMI Converter Switcher S Video Composite RCA DVD HD TV adapter (3-4 weeks delivery time
https://www.ebay.com.au/itm/295472602625

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!?

3.1 FFmpeg recipe (PAL)
ffmpeg -i VIDEO_IN \
-c:v ffv1 -level 3 -coder 1 -context 0 -slices 24 -slicecrc 1 \
-color_primaries bt470bg \
-color_trc bt709 \
-colorspace bt470bg \
-color_range mpeg \
-map 0 \
-top 1 \
-c:a copy \
-g 1 -pix_fmt + \
VIDEO_OUT.mkv

3.2 Reference Example
https://trac.ffmpeg.org/wiki/Encode/FFV1

    Copy audio "as-is" and use FFV1.3 as video codec.

    Parameters are 8 threads, coder=1, context=1, GOP-size=1, 24 slices and slice-CRC on:

    ffmpeg -i <input_video>     \
        -acodec   copy          \
        -vcodec   ffv1 -level 3 \
        -threads  8             \
        -coder    1             \
        -context  1             \
        -g        1             \
        -slices  24             \
        -slicecrc 1             \
        <output_video>


3.3 Various Encoding examples for Video capture from USB camera /dev/video0:

ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i /dev/video0 output_data.mkv

ffmpeg -f v4l2 -framerate 25 -video_size 720x576 -i /dev/video0 -codec:v ffv1 -codec:a pcm_s16le \
    -f matroska  output_video.mkv

Check that video is captured properly using ffplay:

ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i $AUDIO \
    -r 25 -thread_queue_size 1024 -i $VIDEO \
    -codec copy -f matroska  - | ffplay -

Check the overall flow using ffplay before capturing:

ffmpeg -ar 44100 -thread_queue_size 1024 -f alsa -i $AUDIO \
    -itsoffset -0.5 -r 25 -thread_queue_size 1024 -i $VIDEO \
    -filter_complex 'channelmap=FL-0' -filter_complex 'crop=w=700:h=556:x=8:y=0' \
    -map 1:v  -map 0:a -codec:v ffv1 -codec:a pcm_s16le \
    -f matroska  - | ffplay -



4, Regarding FFV1 lossless compression in realtime
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. This according to a 2012/2015 article, where I have extracted the results for FFV1 v.3 in the tables below:

http://www.av-rd.com/knowhow/video/comparison_video_codecs_containers.html#codec_tests
 NOTE: This is a consumer grade, off-the-shelf PC setup.

Hardware:
CPU: Intel(R) QuadCore(TM) i7-2600K CPU @ 3.40GHz
RAM: 8 GB
Disk: Intel SSDSA2CW080G3 (SSD)
Software:
Operating System: GNU/Linux (Xubuntu 12.04.1, 64bit)
Transcoding tool: FFmpeg (version git N-59183-g3e62654, Dec 17 2013)

Video source file: VQEG reference video "football" (NTSC-SD, 720x486px, 30fps, yuv422p, 8bpc)
Codec Encoding Decoding Filesize % of uncompressed Implementation Details
FFV1 (version 3) 216 fps 277 fps 111 MiB 46.1% libavcodec (FFmpeg) log, framemd5


Video source file: SVT reference video "park joy" (full-HD/1080p, 1920x1080px, 50fps, yuv420p, 8bpc)
Codec Encoding Decoding Filesize % of uncompressed Implementation Details
FFV1 (version 3) 31 fps 63 fps 879 MiB 57.2% libavcodec (FFmpeg) log, framemd5



PAL-SD 720x576 stored as YUV422, 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.

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?


5. Related 2021-[Cin] threads as background references

[Cin] hdmi capture card (with v4l2)
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02865.html

[Cin] offtopic: Digitize and record Video with A/D USB adapters
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03269.html

[Cin] offtopic: HDMI capture
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02084.html

[Cin] Is SD and HD 422 Video Capture obtainable with V4L(2)?
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03719.html

[Cin] Uncompressed video to lossless compression FFV1/MKV
https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg03791.html