In case this also may be something for a CinGG "dv50.mov" preset:
Long time ago, Renomath "Video with Linux, Workflow Resources" by
Eric Olson, catched my interest (then unobtainable) DV50 when I read
Hi8 Tape to DVD
Video Workflow with Linux
If you have a faster system you may want to consider capturing
using the DV50 codec using a 4:2:2 color space. In order to do
this, libng from the xawtv project needs to be patched to
recognize the dv50 codec. Using dv50 as the capture codec really
allows the Linux solution to surpass a stand-along DVD recorder.
It is also possible to capture the video using ffmpeg or lavrec.
Cinelerra
Version 4.x yuv4mpeg Patch
Patch for dnxhd and dv50 Quicktime Input, which add dnxhd and
dv50 input to Cinelerra. The advantage of dnxhd and dv50 over
mjpeg is native support of 1080i, 4:2:2 chroma and greater
encoding quality due to more flexible quantization and compression
methods.
-------
While ffv1.mkv often is suggested as preservation master file
for migrating analog VHS materials, a mezzanin file has also been
suggested using
File Wrapper: QuickTime (.mov), Video Stream: DV50, Audio Stream:
48Khz/16-bit PCM
https://memoriav.ch/wp-content/uploads/2014/07/VARRFP.pdf
----
FFmpeg documentation has little documentation about dv50, which
seemingly is less used:
https://ffmpeg.org/ffmpeg.html#Main-options
https://ffmpeg.org/pipermail/ffmpeg-user/2023-June/056548.html
-target type (output)
Specify target file type (vcd, svcd, dvd, dv, dv50). type
may be prefixed with pal-, ntsc- or film- to use the
corresponding standard. All the format options (bitrate, codecs,
buffer sizes) are then set automatically.
The dv50 target is identical to the dv target except that the pixel
format set is yuv422p for all three standards.
----------
I have tried to experiment with dv50 encoding via my ms2130 capture
and v4l2 driver. First with just "c:v dvvideo -target dv50" which
resulted in "25fps" and 50Mbps, but this caused jumping video
images. I expect that issue was due to a unsupported frame rate.
Some AI search later told me that DVCPRO50 (aka DV50) possibly
optional could shoot in 50fps, so I tried to add "-r 50" in the
output, which resulted in twice as big output file with 50fps as
follows, but steady video images.
ffmpeg -hide_banner -f v4l2 -i /dev/video0 -f alsa -ch_layout stereo
-i hw:CARD=UHD,DEV=0 -codec:v dvvideo -b:v 50M -minrate 50M -maxrate
50M -target pal-dv50 -r 50 -c:a copy -t 10 -f mov DV50p+pcm.mov
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 174.116728, bitrate: 1990656 kb/s
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422,
1920x1080, 1990656 kb/s, 60 fps, 60 tbr, 1000k tbn
Input #1, alsa, from 'hw:CARD=UHD,DEV=0':
Duration: N/A, start: 1749543254.028464, bitrate: 1536 kb/s
Stream #1:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[vost#0:0/dvvideo @ 0x55ecffd02f80] Multiple -r options specified
for stream 0, only the last option '-r 50' will be used.
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> dvvideo (native))
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[dvvideo @ 0x7f5c30706300] Only top-left chroma location is
supported in DV, input value is: unspecified
......
[dvvideo @ 0x55ecffce9440] Only top-left chroma location is
supported in DV, input value is: unspecified
Output #0, mov, to 'DV50p+pcm.mov':
Metadata:
encoder : Lavf61.7.100
Stream #0:0: Video: dvvideo (dvcp / 0x70637664), yuv422p(tv,
progressive), 720x576, q=2-31, 50000 kb/s, 50 fps, 12800 tbn
Metadata:
encoder : Lavc61.19.101 dvvideo
Stream #0:1: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
[out#0/mov @ 0x55ecffd02700] video:140625KiB audio:1875KiB
subtitle:0KiB other streams:0KiB global headers:0KiB muxing
overhead: 0.026991%
frame= 500 fps= 50 q=-0.0 Lsize= 142539KiB time=00:00:10.00
bitrate=116767.7kbits/s dup=0 drop=98 speed=0.998x
------------
du -sh DV*
69M DV50i.mov
138M DV50p.mov
140M DV50p+pcm.mov
---------
ffprobe -hide_banner DV50p+pcm.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DV50p+pcm.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf61.7.100
Duration: 00:00:10.00, start: 0.000000, bitrate: 116767 kb/s
Stream #0:0[0x1]: Video: dvvideo (dv5p / 0x70357664),
yuv422p(progressive), 720x576 [SAR 16:15 DAR 4:3], 57600 kb/s, 50
fps, 50 tbr, 12800 tbn (default)
Metadata:
handler_name : VideoHandler
vendor_id : FFMP
encoder : Lavc61.19.101 dvvideo
Stream #0:1[0x2]: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]