вс, 4 мая 2025 г., 16:31 Terje J. Hanssen <[email protected]>:
> > > Den 04.05.2025 05:49, skrev Andrew Randrianasulu: > > > > вс, 4 мая 2025 г., 01:37 Terje J. Hanssen <[email protected]>: > >> >> 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 <[email protected]>: >> >>> https://www.mail-archive.com/[email protected]/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 ? > > > Nothing as far as I can see(?). It seems both camera devices allocate or > are associated with three devices each. > > > it seems that whole thing fail at > > Dequeued v4l2 buffer contains corrupted data (0 bytes). > > > I seems to happend when and after using unsupported fps > > Does anything else (guvcview, vlc ..) process video stream this usb3 UHD > device? > > mplayer tv:// -demuxer tv ? > > > Not that I use, but have not haven't found a way to verify it. > > However, I have recalled and found out more with progress. > > The most important it seems required to reboot the machine with the > camcorder ON (video signal) on beforehand, before ffmpeg get the video > input. > > Reboot also seems required to clean up v4L2 buffer after using unsupported > fps ffplay or ffmpeg cause the > "Dequeued v4l2 buffer contains corrupted data (0 bytes)." > Hopefully there are a v4L command to easier cleanup the latter? > Does unpluggin and repluggin it helps without reboot? Otherwise you probably want to talk to v4l2 maintainers or knowledgable people at suse forums ... > > Beside the already listed Video4Linux devices, there are also > > cat /proc/asound/cards > > 0 [PCH_1 ]: HDA-Intel - HDA Intel PCH > HDA Intel PCH at 0x4200910000 irq 168 > 1 [PCH ]: HDA-Intel - HDA Intel PCH > HDA Intel PCH at 0x41300000 irq 169 > 2 [UHD ]: USB-Audio - USB3.0 UHD > MACROSILICON USB3.0 UHD at usb-0000:00:14.0-3, super > speed > 3 [Camera ]: USB-Audio - USB 2.0 Camera > Sonix Technology Co., Ltd. USB 2.0 Camera at > usb-0000:00:14.0-11.2, high speed > > > However, so far ffmpeg has yet to find any audio streams via v4l2 as seen > below. > may be you need another -i so you can point ffmpeg at alsa or pulseaudio audio capture device? yes, this line grows bigger by the day ... ) S-vido as well as audio L/R cables are connected between the camcorder out > and A/D converter IN. > Maybe additional configuration is required (I didn't think the separate > sound card (Behringer U-Phono should be necessary) > ---------- > > To list the v4l2 device capabilities; > > v4l2-ctl -d /dev/video0 --list-formats-ext > > ioctl: VIDIOC_ENUM_FMT > Type: Video Capture > > [0]: 'YUYV' (YUYV 4:2:2) > Size: Discrete 1920x1080 > 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 1600x1200 > 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 1360x768 > 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 1280x1024 > 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 1280x960 > 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 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 1024x768 > 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 800x600 > 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) > Size: Discrete 720x480 > 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 640x480 > 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) > > > That is supported 10-20-30-50-60 fps for all sizes, not 25 fps! > so it looks like it does some frame/field interpolation (for s-video input) without letting user correct/disable this? Does this device come with manual of any sort? Any Windows utility perhaps? ------------- > > Try the same test for /dev/video1 > > v4l2-ctl -d /dev/video1 --list-formats-ext > > ioctl: VIDIOC_ENUM_FMT > > =========== > > ffmpeg listed available formats (supported pixel formats, video formats, > and frame sizes) for a particular input device: > > ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video0 > > [video4linux2,v4l2 @ 0x55a384b214c0] Raw : yuyv422 : > YUYV 4:2:2 : 1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 > 1024x768 800x600 720x576 720x480 640x480 > [in#0 @ 0x55a384b21200] Error opening input: Immediate exit requested > Error opening input file /dev/video0. > > And similar test for /dev/video1 > > ffmpeg -hide_banner -f v4l2 -list_formats all -i /dev/video1 > > [video4linux2,v4l2 @ 0x557e1a5164c0] ioctl(VIDIOC_G_INPUT): Inappropriate > ioctl for device > [in#0 @ 0x557e1a516200] Error opening input: Inappropriate ioctl for device > Error opening input file /dev/video1. > Error opening input files: Inappropriate ioctl for device > > =============== > > With supported 50 fps specified, ffplay playback looks ok visually: > > ffplay -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 > -framerate 50 /dev/video0 > > Input #0, video4linux2,v4l2, from '/dev/video0':B sq= 0B > Duration: N/A, start: 311.577886, bitrate: 331776 kb/s > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, > 331776 kb/s, 50 fps, 50 tbr, 1000k tbn > ^Cterje@localhost:/Videoklipp/HDMI-USB3_Capture> sq= 0B > > =============== > > Capture DVD compatible MPG video (no audio found) with supported 50 fps > progressive video. > No Audio stream!? > > ffmpeg -hide_banner -f v4l2 -input_format yuyv422 -video_size 720x576 > -framerate 50 -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_50fps_ms2130.mpg > > Input #0, video4linux2,v4l2, from '/dev/video0': > Duration: N/A, start: 323.195348, 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 > [mpeg2video @ 0x55e390580200] 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_50fps_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, 50 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 @ 0x55e390581e00] video:18921KiB audio:0KiB subtitle:0KiB other > streams:0KiB global headers:0KiB muxing overhead: 1.242550% > frame= 1000 fps= 50 q=2.5 Lsize= 19156KiB time=00:00:19.98 > bitrate=7854.2kbits/s speed=0.998x > > > Stopped automatic ! Why? > may be usb cable just moved a bit? > ---------------- > > du -sh * > > 19M 720x576_50fps_ms2130.mpg > > > ffprobe -hide_banner 720x576_50fps_ms2130.mpg > > Input #0, mpeg, from '720x576_50fps_ms2130.mpg': > Duration: 00:00:20.00, start: 0.520000, bitrate: 7846 kb/s > Stream #0:0[0x1e0]: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), > 720x576 [SAR 1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn > Side data: > cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 20004864 > vbv_delay: N/A > > > The video file playback looks ok with correct SD aspect ratio using ffplay > and VLC, though "1080P" is printer near the top-right corner. > hm ...... I hope this "overlay" can be disabled? > ============================ > > > > > >
-- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
