вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <terjejhans...@gmail.com>:
> > Den 03.05.2025 13:00, skrev Terje J. Hanssen: > > > Den 02.05.2025 21:42, skrev Andrew Randrianasulu: > > > > пт, 2 мая 2025 г., 22:37 Terje J. Hanssen <terjejhans...@gmail.com>: > >> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg05748.html >> >> I contine this new thread with an short extract from the long growing >> [Cin] ms2130 HDMI-USB3 UHD capture card - not quite as expected? >> >> But shouldn't a 422 and not a 420 output format be created? >> >> >> it seems in some cases ffmpeg not geared towards preserving most >> information, just picks up most commonly defined/first pixel format. >> >> Try mpeg2video as output codec, and/or specify pixel format (pix_fmt) >> more explicitly before output's filename? >> >> >>> Could you possibly examplify the latter? >> >> >>>> I think I just theorized ffmpeg may try to get some info from alsa >> device file directly, as it tries with /dev/video. But I never >>>> tried >> this way, so I can be totally wrong! >> >> ------------------------------- >> >> Instead of 50i (pal interlaced fields), I try 50 fps (progressive) that >> at least is a pal frequence. >> >> And yes, it seems from the output that ffmpeg uses mpeg1video as default >> output codec. >> >> Furter I try to combine the current line >> >> ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 >> -framerate 25 -t 20 -i /dev/video2 out-720x576_ms2130.mpeg >> >> >> with and utilize the syntax developed 2021 for "Blu-ray compliant MPEG-2 >> SD video with LPCM audio" >> >> ffmpeg -i dv28.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 25M -maxrate 25M >> -minrate 25M -bufsize 45M -muxrate 45M -dc 10 -c:a pcm_s16be -f vob >> dv28.mpg >> >> and for the current ongoing "DVD compliant MPEG-2 Video and PCM Audio" >> >> ffmpeg -hide_banner -i dv01.dv -c:v mpeg2video -refs 1 -bf 2 -b:v 8M >> -maxrate 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f >> vob -flags +ilme+ildct dv01.mpg >> >> to first >> >> ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 >> -framerate 50 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M >> -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 -i /dev/video2 >> 720x576_50p_ms2130.mpg >> Option b:v (video bitrate (please use -b:v)) cannot be applied to input >> url /dev/video2 -- you are trying to apply an input option to an output >> file or vice versa. Move this option before the file it belongs to. >> Error parsing options for input file /dev/video2. >> Error opening input files: Invalid argument >> >> >> and next revised with no output. That is I need help to debug the syntax >> error: >> >> ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 >> -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate >> 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 >> 720x576_50p_ms2130.mpg >> [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains >> corrupted data (0 bytes). >> Input #0, video4linux2,v4l2, from '/dev/video2': >> Duration: N/A, start: 0.000000, bitrate: 331776 kb/s >> Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, >> 331776 kb/s, 50 fps, 50 tbr, 1000k tbn >> Stream mapping: >> Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) >> Press [q] to stop, [?] for help >> [video4linux2,v4l2 @ 0x55db770ef9c0] Dequeued v4l2 buffer contains >> corrupted data (0 bytes). >> Last message repeated 30 times >> [mpeg2video @ 0x55db77114f00] Warning vbv_delay will be set to 0xFFFF >> (=VBR) as the specified vbv buffer is too large for the given bitrate! >> Output #0, vob, to '720x576_50p_ms2130.mpg': >> Metadata: >> encoder : Lavf59.27.100 >> Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), >> 720x576, q=2-31, 8000 kb/s, 50 fps, 90k tbn >> Metadata: >> encoder : Lavc59.37.100 mpeg2video >> Side data: >> cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: >> 20000000 vbv_delay: N/A >> frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A >> speed= 0x >> video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB >> muxing overhead: unknown >> Output file is empty, nothing was encoded (check -ss / -t / -frames >> parameters if used) >> >> > well, I think framerate still 25 for 50i stream .... > > can you re-check last line with framerate parameter removed or changed > back to 25? > > > Ok, as this old post by my mistake already has been forwarded to the list > and replied, I will follow it up later today, but need to rig rig up my > camcorder and devices > > > Finally ready, I had to recall a lot since 2023. > > ls /dev/video* > /dev/video0 /dev/video1 /dev/video2 /dev/video3 > > > for i in /dev/video*; do echo "$i"; udevadm info --query=all > --attribute-walk --name=$i | grep -E "name"; done > /dev/video0 > ATTR{name}=="USB3.0 UHD: USB3.0 UHD" > /dev/video1 > ATTR{name}=="USB3.0 UHD: USB3.0 UHD" > /dev/video2 > ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" > /dev/video3 > ATTR{name}=="USB 2.0 Camera: HD 720P Webcam" > > > v4l2-ctl --list-devices > USB 2.0 Camera: HD 720P Webcam (usb-0000:00:14.0-11.2): > /dev/video2 > /dev/video3 > /dev/media1 > > USB3.0 UHD: USB3.0 UHD (usb-0000:00:14.0-3): > /dev/video0 > /dev/video1 > /dev/media0 > > As seen the HDMI-USB3 capture card + the S-Video/HDMI converter (with the > analog S-video camcorder) is now on /dev/video0 > while the USB2 webcam is on /dev/video2 > but what is on video1 ? it seems that whole thing fail at Dequeued v4l2 buffer contains corrupted data (0 bytes). Does anything else (guvcview, vlc ..) process video stream this usb3 UHD device? mplayer tv:// -demuxer tv ? > ffplay can playback the S-video camcorder's imaging stream > > Default without framerate specified: > > ffplay -hide_banner -f video4linux2 /dev/video0 > [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 0.000000, bitrate: 398131 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 398131 kb/s, 60 fps, 60 tbr, 1000k tbn > [video4linux2,v4l2 @ 0x7fe3c0000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Last message repeated 30 times > ^Cterje@localhost:~> d= 2 aq= 0KB vq= 0KB sq= 0B > > With 25 fps specified: > > ffplay -hide_banner -f video4linux2 -framerate 25 /dev/video0 > [video4linux2,v4l2 @ 0x7f7fa8000c80] The driver changed the time per frame > from 1/25 to 1/30 > [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 0.000000, bitrate: 199065 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 199065 kb/s, 30 fps, 30 tbr, 1000k tbn > [video4linux2,v4l2 @ 0x7f7fa8000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Last message repeated 30 times > ^Cterje@localhost:~> d= 0 aq= 0KB vq= 0KB sq= 0B > > With 30 fps specified: > > ffplay -hide_banner -f video4linux2 -framerate 30 /dev/video0 > [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 0.000000, bitrate: 199065 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 199065 kb/s, 30 fps, 30 tbr, 1000k tbn > [video4linux2,v4l2 @ 0x7f3878000c80] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Last message repeated 30 times > > ----------------- > > But empty output file with ffmpeg: > > With 25 fps specified > > ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 > -framerate 25 -i /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate > 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 > 720x576_25fps_ms2130.mpg > [video4linux2,v4l2 @ 0x560fe5926740] The driver changed the time per frame > from 1/25 to 1/30 > [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 0.000000, bitrate: 199065 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 199065 kb/s, 30 fps, 30 tbr, 1000k tbn > Stream mapping: > Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) > Press [q] to stop, [?] for help > [video4linux2,v4l2 @ 0x560fe5926740] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Last message repeated 30 times > [mpeg2video @ 0x560fe5927140] Warning vbv_delay will be set to 0xFFFF > (=VBR) as the specified vbv buffer is too large for the given bitrate! > Output #0, vob, to '720x576_25fps_ms2130.mpg': > Metadata: > encoder : Lavf61.7.100 > Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), > 720x576, q=2-31, 8000 kb/s, 30 fps, 90k tbn > Metadata: > encoder : Lavc61.19.101 mpeg2video > Side data: > cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: > 20000000 vbv_delay: N/A > [out#0/vob @ 0x560fe5928d00] video:0KiB audio:0KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: unknown > [out#0/vob @ 0x560fe5928d00] Output file is empty, nothing was > encoded(check -ss / -t / -frames parameters if used) > frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A > speed=N/A > > > Without framerate specified: > > ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 -i > /dev/video0 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate 8M -minrate 8M > -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 > 720x576_ms2130.mpg > [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 0.000000, bitrate: 398131 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 398131 kb/s, 60 fps, 60 tbr, 1000k tbn > Stream mapping: > Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) > Press [q] to stop, [?] for help > [video4linux2,v4l2 @ 0x55e707fd8740] Dequeued v4l2 buffer contains > corrupted data (0 bytes). > Last message repeated 30 times > [mpeg2video @ 0x55e707fd9140] Warning vbv_delay will be set to 0xFFFF > (=VBR) as the specified vbv buffer is too large for the given bitrate! > Output #0, vob, to '720x576_ms2130.mpg': > Metadata: > encoder : Lavf61.7.100 > Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), > 720x576, q=2-31, 8000 kb/s, 60 fps, 90k tbn > Metadata: > encoder : Lavc61.19.101 mpeg2video > Side data: > cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: > 20000000 vbv_delay: N/A > [out#0/vob @ 0x55e707fdacc0] video:0KiB audio:0KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: unknown > [out#0/vob @ 0x55e707fdacc0] Output file is empty, nothing was > encoded(check -ss / -t / -frames parameters if used) > frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A > speed=N/A > > -------------- > > On the other hand, capturing with the USB webcam creates output file > > Here with 50 fps specified > > ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 > -framerate 50 -i /dev/video2 -c:v mpeg2video -refs 1 -bf 2 -b:v 8M -maxrate > 8M -minrate 8M -bufsize 20M -muxrate 11M -dc 10 -c:a pcm_dvd -f vob -t 20 > 720x576_50p_ms2130.mpg > [video4linux2,v4l2 @ 0x56418fd52740] The V4L2 driver changed the video > from 720x576 to 800x600 > [video4linux2,v4l2 @ 0x56418fd52740] The driver changed the time per frame > from 1/50 to 1/20 > Input #0, video4linux2,v4l2, from '/dev/video2': > Duration: N/A, start: 1969.283514, bitrate: 153600 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 800x600, > 153600 kb/s, 20 fps, 20 tbr, 1000k tbn > Stream mapping: > Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native)) > Press [q] to stop, [?] for help > [mpeg2video @ 0x56418fd53200] Warning vbv_delay will be set to 0xFFFF > (=VBR) as the specified vbv buffer is too large for the given bitrate! > Output #0, vob, to '720x576_50p_ms2130.mpg': > Metadata: > encoder : Lavf61.7.100 > Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), > 800x600, q=2-31, 8000 kb/s, 20 fps, 90k tbn > Metadata: > encoder : Lavc61.19.101 mpeg2video > Side data: > cpb: bitrate max/min/avg: 8000000/8000000/8000000 buffer size: > 20000000 vbv_delay: N/A > [out#0/vob @ 0x56418fd54e00] video:13281KiB audio:0KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: 1.230734% > frame= 284 fps= 22 q=2.0 Lsize= 13444KiB time=00:00:14.15 > bitrate=7783.3kbits/s dup=97 drop=0 speed=1.08x > Exiting normally, received signal 2. > > ffprobe -hide_banner 720x576_50p_ms2130.mpg > Input #0, mpeg, from '720x576_50p_ms2130.mpg': > Duration: 00:00:14.20, start: 0.550000, bitrate: 7755 kb/s > Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), > 800x600 [SAR 1:1 DAR 4:3], 20 fps, 20 tbr, 90k tbn > Side data: > cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 > vbv_delay: N/A > > > > > > > > > > > > > > > > >
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