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• How can I capture simple video input with audio from a capture device

  17 décembre 2020, par Geoff Sweet

  I'm using ffmpeg on Arch linux and trying to convert some old video to digital. The setup is pretty straightforward and if I connect to the capture device with VLC I get the video and audio just fine. So now I want to capture that with ffmpeg and write it to a file so I can edit it and clean it up. I'm only so-so familiar with ffmpeg and I've been digging through the man pages and here is where I am at.

  


  This command captures perfect audio, but no video :

  


  ffmpeg -f alsa -ac 2 -i front:CARD=Capture,DEV=0 out.mpeg


  


  This command captures perfect video ;

  


  ffmpeg -f video4linux2 -i /dev/video0 out.mpeg


  


  captures the video signal great, but with no audio. So combining them together should give me :

  


  ffmpeg -y -f alsa -ac 2 -i front:CARD=Capture,DEV=0 -f video4linux2 -i /dev/video0 out.mpeg


  


  But that command kinda falls on it's face. I get the audio, but no video :

  


  ffmpeg -y -f alsa -ac 2 -i front:CARD=Capture,DEV=0 -f video4linux2 -i /dev/video0 out.mpeg
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-shared --enable-version3
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'front:CARD=Capture,DEV=0':
  Duration: N/A, start: 1608093176.894565, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
[video4linux2,v4l2 @ 0x56248fe0ab80] Dequeued v4l2 buffer contains corrupted data (0 bytes).
Input #1, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 0.000000, bitrate: 995328 kb/s
    Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 995328 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #1:0 -> #0:0 (rawvideo (native) -> mpeg1video (native))
  Stream #0:0 -> #0:1 (pcm_s16le (native) -> mp2 (native))
Press [q] to stop, [?] for help
[video4linux2,v4l2 @ 0x56248fe0ab80] Dequeued v4l2 buffer contains corrupted data (0 bytes).
    Last message repeated 30 times
[alsa @ 0x56248fdb3840] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
[mpeg @ 0x56248fe0dfc0] VBV buffer size not set, using default size of 230KB
If you want the mpeg file to be compliant to some specification
Like DVD, VCD or others, make sure you set the correct buffer size
Output #0, mpeg, to 'out.mpeg':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: mpeg1video, yuv420p(progressive), 1920x1080, q=2-31, 200 kb/s, 30 fps, 90k tbn, 30 tbc
    Metadata:
      encoder         : Lavc58.91.100 mpeg1video
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    Metadata:
      encoder         : Lavc58.91.100 mp2
frame=    2 fps=0.0 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=2.0 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=1.3 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=1.0 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.8 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.7 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.6 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.5 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.4 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.4 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.4 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.3 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.3 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.3 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.3 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.2 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/sframe=    2 fps=0.1 q=3.2 size=       0kB time=01:48:49.26 bitrate=   0.0kbits/s[video4linux2,v4l2 @ 0x56248fe0ab80] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=0 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=2020 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=4061 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=6102 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=8143 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=10184 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=12225 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=14266 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=16307 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=18348 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=20389 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=22430 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=24471 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=26512 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=28553 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=30594 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=32635 size=36451
[mpeg @ 0x56248fe0dfc0] buffer underflow st=0 bufi=34676 size=36451
frame=    2 fps=0.1 q=2.0 Lsize=    1470kB time=01:48:49.30 bitrate=   1.8kbits/s speed= 221x    
video:63kB audio:1388kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.314351%
Exiting normally, received signal 2.


  


  what I would ideally like is just a fairly raw 2ch stereo "dump" of what comes through the capture card.

  


  As always, I super appreciate any advice

  


• ffmpeg capture video and audio produced corrupt output

  18 décembre 2020, par wheelie tips

  I have two separate FFmpeg commands that each works well on its own, one for capturing video and the other for capturing audio from the same device ; the captured audio is :

  


  ffmpeg -f alsa -thread_queue_size 16384 -i hw:CARD=C4K,DEV=0 -acodec aac /home/pi/Videos/temp.wav


  


  and the captured video is :

  


  ffmpeg -y -nostdin -f v4l2 -threads auto -input_format yuyv422 -fflags +genpts -flags +global_header -thread_queue_size 16384 -i /dev/video0 -s 1280x720 -r 25 -vcodec h264_v4l2m2m -num_output_buffers 32 -num_capture_buffers 16 -keyint_min 25 -force_key_frames "expr:gte(t,n_forced*1)" -g 50 -b:v 6M -pix_fmt nv12 -f mpegts -muxdelay 0 -muxpreload 0 -movflags +faststart /home/pi/Videos/output.mp4


  


  I’ve tried to combine the two into one call to produce one video file with the audio channel, but whatever I’ve been attempting, the results output were messed up ; obviously, I’m missing something, for example, my latest attempt prodused a frozen image video with the audio channel :

  


  ffmpeg -y -nostdin -f v4l2 -threads auto -input_format yuyv422 -fflags +genpts -flags +global_header -thread_queue_size 16384 -i /dev/video0 -f alsa -thread_queue_size 16384 -i hw:CARD=C4K,DEV=0 -acodec aac -s 1280x720 -r 25 -vcodec h264_v4l2m2m -num_output_buffers 32 -num_capture_buffers 16 -keyint_min 25 -force_key_frames "expr:gte(t,n_forced*1)" -g 50 -b:v 6M -b:a 128K -pix_fmt nv12 -f mpegts -muxdelay 0 -muxpreload 0 -movflags +faststart /home/pi/Videos/output.mp4 -loglevel debug


  


  the full output of the above command :

  


  ffmpeg version ca55240 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --prefix=/home/pi/ffmpeg_build --pkg-config-flags='pkg-config --static' --extra-cflags=-I/home/pi/ffmpeg_build/include --extra-ldflags=-L/home/pi/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/pi/bin --enable-gpl --enable-gnutls --disable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --disable-libx265 --enable-nonfree --arch=aarch64 --disable-libxml2 --enable-libwebp --enable-libdrm
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-nostdin' ... matched as option 'stdin' (enable or disable interaction on standard input) with argument 0.
Reading option '-f' ... matched as option 'f' (force format) with argument 'v4l2'.
Reading option '-threads' ... matched as AVOption 'threads' with argument 'auto'.
Reading option '-input_format' ... matched as AVOption 'input_format' with argument 'yuyv422'.
Reading option '-fflags' ... matched as AVOption 'fflags' with argument '+genpts'.
Reading option '-flags' ... matched as AVOption 'flags' with argument '+global_header'.
Reading option '-thread_queue_size' ... matched as option 'thread_queue_size' (set the maximum number of queued packets from the demuxer) with argument '16384'.
Reading option '-i' ... matched as input url with argument '/dev/video0'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'alsa'.
Reading option '-thread_queue_size' ... matched as option 'thread_queue_size' (set the maximum number of queued packets from the demuxer) with argument '16384'.
Reading option '-i' ... matched as input url with argument 'hw:CARD=C4K,DEV=0'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'aac'.
Reading option '-s' ... matched as option 's' (set frame size (WxH or abbreviation)) with argument '1280x720'.
Reading option '-r' ... matched as option 'r' (set frame rate (Hz value, fraction or abbreviation)) with argument '25'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'h264_v4l2m2m'.
Reading option '-num_output_buffers' ... matched as AVOption 'num_output_buffers' with argument '32'.
Reading option '-num_capture_buffers' ... matched as AVOption 'num_capture_buffers' with argument '16'.
Reading option '-keyint_min' ... matched as AVOption 'keyint_min' with argument '25'.
Reading option '-force_key_frames' ... matched as option 'force_key_frames' (force key frames at specified timestamps) with argument 'expr:gte(t,n_forced*1)'.
Reading option '-g' ... matched as AVOption 'g' with argument '50'.
Reading option '-b:v' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '6M'.
Reading option '-b:a' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '128K'.
Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'nv12'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'mpegts'.
Reading option '-muxdelay' ... matched as option 'muxdelay' (set the maximum demux-decode delay) with argument '0'.
Reading option '-muxpreload' ... matched as option 'muxpreload' (set the initial demux-decode delay) with argument '0'.
Reading option '-movflags' ... matched as AVOption 'movflags' with argument '+faststart'.
Reading option '/home/pi/Videos/output.mp4' ... matched as output url.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option nostdin (enable or disable interaction on standard input) with argument 0.
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url /dev/video0.
Applying option f (force format) with argument v4l2.
Applying option thread_queue_size (set the maximum number of queued packets from the demuxer) with argument 16384.
Successfully parsed a group of options.
Opening an input file: /dev/video0.
[video4linux2,v4l2 @ 0x55a0c86b40] fd:3 capabilities:84a00001
[video4linux2,v4l2 @ 0x55a0c86b40] Current input_channel: 0, input_name: Input 1, input_std: 0
[video4linux2,v4l2 @ 0x55a0c86b40] Querying the device for the current frame size
[video4linux2,v4l2 @ 0x55a0c86b40] Setting frame size to 1920x1080
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
[video4linux2,v4l2 @ 0x55a0c86b40] All info found Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 0.000000, bitrate: 1988671 kb/s
    Stream #0:0, 1, 1/1000000: Video: rawvideo, 1 reference frame (YUY2 / 0x32595559), yuyv422, 1920x1080, 0/1, 1988671 kb/s, 59.94 fps, 59.94 tbr, 1000k tbn, 1000k tbc Successfully opened the file.
Parsing a group of options: input url hw:CARD=C4K,DEV=0.
Applying option f (force format) with argument alsa.
Applying option thread_queue_size (set the maximum number of queued packets from the demuxer) with argument 16384.
Successfully parsed a group of options.
Opening an input file: hw:CARD=C4K,DEV=0.
[alsa @ 0x55a0c89630] All info found
Guessed Channel Layout for Input Stream #1.0 : stereo Input #1, alsa, from 'hw:CARD=C4K,DEV=0':
  Duration: N/A, start: 1608286705.387903, bitrate: 1536 kb/s
    Stream #1:0, 1, 1/1000000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Successfully opened the file.
Parsing a group of options: output url /home/pi/Videos/output.mp4.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument aac.
Applying option s (set frame size (WxH or abbreviation)) with argument 1280x720.
Applying option r (set frame rate (Hz value, fraction or abbreviation)) with argument 25.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument h264_v4l2m2m.
Applying option force_key_frames (force key frames at specified timestamps) with argument expr:gte(t,n_forced*1).
Applying option b:v (video bitrate (please use -b:v)) with argument 6M.
Applying option b:a (video bitrate (please use -b:v)) with argument 128K.
Applying option pix_fmt (set pixel format) with argument nv12.
Applying option f (force format) with argument mpegts.
Applying option muxdelay (set the maximum demux-decode delay) with argument 0.
Applying option muxpreload (set the initial demux-decode delay) with argument 0.
Successfully parsed a group of options.
Opening an output file: /home/pi/Videos/output.mp4.
[file @ 0x55a0ca7210] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_v4l2m2m))
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native)) cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 3 times
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 12 times
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
    Last message repeated 2 times
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[video4linux2,v4l2 @ 0x55a0c86b40] Dequeued v4l2 buffer contains corrupted data (0 bytes).
    Last message repeated 23 times
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 1452 times
[rawvideo @ 0x55a0c89130] PACKET SIZE: 4147200, STRIDE: 3840 detected 4 logical cores [graph 0 input from stream 0:0 @ 0x55a0ca9080] Setting 'video_size' to value '1920x1080'
[graph 0 input from stream 0:0 @ 0x55a0ca9080] Setting 'pix_fmt' to value '1'
[graph 0 input from stream 0:0 @ 0x55a0ca9080] Setting 'time_base' to value '1/1000000'
[graph 0 input from stream 0:0 @ 0x55a0ca9080] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 0x55a0ca9080] Setting 'frame_rate' to value '7013/117'
[graph 0 input from stream 0:0 @ 0x55a0ca9080] w:1920 h:1080 pixfmt:yuyv422 tb:1/1000000 fr:7013/117 sar:0/1
[scaler_out_0_0 @ 0x55a0cb0060] Setting 'w' to value '1280'
[scaler_out_0_0 @ 0x55a0cb0060] Setting 'h' to value '720'
[scaler_out_0_0 @ 0x55a0cb0060] Setting 'flags' to value 'bicubic'
[scaler_out_0_0 @ 0x55a0cb0060] w:1280 h:720 flags:'bicubic' interl:0 [format @ 0x55a0cb05b0] Setting 'pix_fmts' to value 'nv12'
[AVFilterGraph @ 0x55a0ca2730] query_formats: 5 queried, 4 merged, 0 already done, 0 delayed
[scaler_out_0_0 @ 0x55a0cb0060] w:1920 h:1080 fmt:yuyv422 sar:0/1 -> w:1280 h:720 fmt:nv12 sar:0/1 flags:0x4 [h264_v4l2m2m @ 0x55a0ca5610] probing device /dev/video12 [h264_v4l2m2m @ 0x55a0ca5610] driver 'bcm2835-codec' on card 'bcm2835-codec-isp' in mplane mode [h264_v4l2m2m @ 0x55a0ca5610] v4l2 capture format not supported [h264_v4l2m2m @ 0x55a0ca5610] probing device /dev/video11 [h264_v4l2m2m @ 0x55a0ca5610] driver 'bcm2835-codec' on card 'bcm2835-codec-encode' in mplane mode [h264_v4l2m2m @ 0x55a0ca5610] Using device /dev/video11 [h264_v4l2m2m @ 0x55a0ca5610] driver 'bcm2835-codec' on card 'bcm2835-codec-encode' in mplane mode [h264_v4l2m2m @ 0x55a0ca5610] requesting formats: output=NV12 capture=H264 [h264_v4l2m2m @ 0x55a0ca5610] output: NV12 32 buffers initialized: 1280x0720, sizeimage 01382400, bytesperline 00001280 [h264_v4l2m2m @ 0x55a0ca5610] capture: H264 16 buffers initialized: 1280x0720, sizeimage 00524288, bytesperline 00000000 [h264_v4l2m2m @ 0x55a0ca5610] Failed to set number of B-frames: Invalid argument [h264_v4l2m2m @ 0x55a0ca5610] Failed to get number of B-frames [h264_v4l2m2m @ 0x55a0ca5610] Failed to set header mode: Invalid argument [h264_v4l2m2m @ 0x55a0ca5610] Encoder: bit rate = 6000000 [h264_v4l2m2m @ 0x55a0ca5610] Failed to set frame level rate control: Invalid argument [h264_v4l2m2m @ 0x55a0ca5610] Failed to set gop size: Invalid argument [h264_v4l2m2m @ 0x55a0ca5610] Encoder: repeat parameter sets = 1 [h264_v4l2m2m @ 0x55a0ca5610] Encoder Context: id (27), profile (-99), frame rate(25/1), number b-frames (0), gop size (50), bit rate (6000000), qmin (-1), qmax (-1) [h264_v4l2m2m @ 0x55a0ca5610] Failed to set minimum video quantizer scale: Invalid argument [h264_v4l2m2m @ 0x55a0ca5610] Failed to set maximum video quantizer scale: Invalid argument Forced keyframe at time 0.000000 [h264_v4l2m2m @ 0x55a0ca5610] Encoder: force key frame = 0 cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream) cur_dts is invalid st:1 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[graph_1_in_1_0 @ 0x55a0d465d0] Setting 'time_base' to value '1/48000'
[graph_1_in_1_0 @ 0x55a0d465d0] Setting 'sample_rate' to value '48000'
[graph_1_in_1_0 @ 0x55a0d465d0] Setting 'sample_fmt' to value 's16'
[graph_1_in_1_0 @ 0x55a0d465d0] Setting 'channel_layout' to value '0x3'
[graph_1_in_1_0 @ 0x55a0d465d0] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[format_out_0_1 @ 0x55a0d46af0] Setting 'sample_fmts' to value 'fltp'
[format_out_0_1 @ 0x55a0d46af0] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[format_out_0_1 @ 0x55a0d46af0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[AVFilterGraph @ 0x55a0d45c10] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 0x55a0d47740] [SWR @ 0x55a0d47890] Using s16p internally between filters
[auto_resampler_0 @ 0x55a0d47740] ch:2 chl:stereo fmt:s16 r:48000Hz -> ch:2 chl:stereo fmt:fltp r:48000Hz [mpegts @ 0x55a0caec00] service 1 using PCR in pid=256, pcr_period=80ms [mpegts @ 0x55a0caec00] muxrate VBR, sdt every 500 ms, pat/pmt every 100 ms Output #0, mpegts, to '/home/pi/Videos/output.mp4':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0, 0, 1/90000: Video: h264 (h264_v4l2m2m), 1 reference frame, nv12(progressive), 1280x720, 0/1, q=-1--1, 6000 kb/s, 25 fps, 90k tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.91.100 h264_v4l2m2m
    Stream #0:1, 0, 1/90000: Audio: aac (LC), 48000 Hz, stereo, fltp, delay 1024, 128 kb/s
    Metadata:
      encoder         : Lavc58.91.100 aac
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream) cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream) [rawvideo @ 0x55a0c89130] PACKET SIZE: 4147200, STRIDE: 3840 Clipping frame in rate conversion by 0.132942 cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 17 times
^Cframe=    2 fps=0.3 q=-0.0 Lsize=     183kB time=00:21:16.64 bitrate=   1.2kbits/s speed= 189x
video:24kB audio:101kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 46.992252% Input file #0 (/dev/video0):
  Input stream #0:0 (video): 34 packets read (8294400 bytes); 2 frames decoded;
  Total: 34 packets (8294400 bytes) demuxed Input file #1 (hw:CARD=C4K,DEV=0):
  Input stream #1:0 (audio): 2712 packets read (1233148 bytes); 2712 frames decoded (308287 samples);
  Total: 2712 packets (1233148 bytes) demuxed Output file #0 (/home/pi/Videos/output.mp4):
  Output stream #0:0 (video): 2 frames encoded; 2 packets muxed (24588 bytes);
  Output stream #0:1 (audio): 301 frames encoded (308224 samples); 302 packets muxed (103182 bytes);
  Total: 304 packets (127770 bytes) muxed
2714 frames successfully decoded, 0 decoding errors [AVIOContext @ 0x55a0ca7100] Statistics: 0 seeks, 1 writeouts [aac @ 0x55a0ca65e0] Qavg: 165.061 Exiting normally, received signal 2.


  


  can anyone please help me figure this out ?

  


  Thanks much !

  


  RS

  


• xabe.ffmpeg not working in azure app service

  28 décembre 2020, par Sripathi Raja

  I have a .net core application which generates video thumbnails for uploaded videos. I am using xabe.ffmpeg for this . The code runs fine in the local system and Iam able to generate the thumbnails . I have containerized this application and pushed it to azure app service . But when the code is deployed on azure app service its throws an error . I have placed the ffmpeg.exe ,ffprobe.exe , ffplay.exe inside a folder ffmpeg in wwwroot folder .
the app service logs give this error

  


  the first line is the path : /app/wwwroot/ffmpeg

  


  2020-12-25T14:34:01.347103909Z /app/wwwroot/ffmpeg&#xA;2020-12-25T14:34:01.443016709Z [41m[30mfail[39m[22m[49m : Microsoft.AspNetCore.Server.Kestrel[13]&#xA;2020-12-25T14:34:01.443066009Z Connection id "0HM58S8AE014U", Request id "0HM58S8AE014U:00000002" : An unhandled exception was thrown by the application.&#xA;2020-12-25T14:34:01.456821709Z System.ComponentModel.Win32Exception (2) : No such file or directory&#xA;2020-12-25T14:34:01.462537109Z at System.Diagnostics.Process.ForkAndExecProcess(String filename, String[] argv, String[] envp, String cwd, Boolean redirectStdin, Boolean redirectStdout, Boolean redirectStderr, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)&#xA;2020-12-25T14:34:01.462555709Z at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)&#xA;2020-12-25T14:34:01.462560609Z at System.Diagnostics.Process.Start()&#xA;2020-12-25T14:34:01.463739309Z at Xabe.FFmpeg.FFmpeg.RunProcess(String args, String processPath, Nullable1 priority, Boolean standardInput, Boolean standardOutput, Boolean standardError) 2020-12-25T14:34:01.463755809Z    at Xabe.FFmpeg.FFprobeWrapper.&lt;>c__DisplayClass9_0.<runprocess>b__0() 2020-12-25T14:34:01.463761809Z    at System.Threading.Tasks.Task</runprocess>1.InnerInvoke()&#xA;2020-12-25T14:34:01.463766309Z at System.Threading.Tasks.Task.<>c.<.cctor>b__274_0(Object obj)&#xA;2020-12-25T14:34:01.463781109Z at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)&#xA;2020-12-25T14:34:01.463786509Z --- End of stack trace from previous location where exception was thrown ---&#xA;2020-12-25T14:34:01.463790909Z at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)&#xA;2020-12-25T14:34:01.463795509Z at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)&#xA;2020-12-25T14:34:01.463800009Z --- End of stack trace from previous location where exception was thrown ---&#xA;2020-12-25T14:34:01.463813709Z at Xabe.FFmpeg.FFprobeWrapper.RunProcess(String args, CancellationToken cancellationToken)&#xA;2020-12-25T14:34:01.463818109Z at Xabe.FFmpeg.FFprobeWrapper.GetStreams(String videoPath, CancellationToken cancellationToken)&#xA;2020-12-25T14:34:01.463821909Z at Xabe.FFmpeg.FFprobeWrapper.SetProperties(MediaInfo mediaInfo, CancellationToken cancellationToken)&#xA;2020-12-25T14:34:01.463825509Z at Xabe.FFmpeg.MediaInfo.Get(String filePath, CancellationToken cancellationToken)&#xA;2020-12-25T14:34:01.463829109Z at Xabe.FFmpeg.MediaInfo.Get(String filePath)&#xA;2020-12-25T14:34:01.463832609Z at Xabe.FFmpeg.FFmpeg.GetMediaInfo(String fileName)&#xA;2020-12-25T14:34:01.467009509Z at root2webAPI.Controllers.AzureStorageControllers.BlobExplorerController.GetVideoThumbnailAsync(IFormFile file, Int32 frameTarget) in /src/root2webAPI/Controllers/AzureStorageControllers/BlobExplorerController.cs:line 271&#xA;2020-12-25T14:34:01.467023809Z at root2webAPI.Controllers.AzureStorageControllers.BlobExplorerController.UploadMediaBlob(IFormFile file, String parentId) in /src/root2webAPI/Controllers/AzureStorageControllers/BlobExplorerController.cs:line 96&#xA;2020-12-25T14:34:01.467028709Z at lambda_method(Closure , Object )&#xA;2020-12-25T14:34:01.467032109Z at Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable.Awaiter.GetResult()&#xA;2020-12-25T14:34:01.467035909Z at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)&#xA;2020-12-25T14:34:01.467039409Z at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)&#xA;2020-12-25T14:34:01.467043209Z at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)&#xA;2020-12-25T14:34:01.467055709Z at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)&#xA;2020-12-25T14:34:01.467060609Z at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)&#xA;2020-12-25T14:34:01.467067409Z at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)&#xA;2020-12-25T14:34:01.467071609Z at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)&#xA;2020-12-25T14:34:01.467075209Z at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)&#xA;2020-12-25T14:34:01.467078709Z at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)&#xA;2020-12-25T14:34:01.467089009Z at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)&#xA;2020-12-25T14:34:01.467093409Z at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)&#xA;2020-12-25T14:34:01.467096909Z at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)&#xA;2020-12-25T14:34:01.467100509Z at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)&#xA;2020-12-25T14:34:01.467103809Z at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext]

  &#xA;

  here is my relevant .net application code

  &#xA;

    private async Task<mediametadata> GetVideoThumbnailAsync(IFormFile file,int frameTarget)&#xA;    {&#xA;     var fileName = file.FileName;&#xA;     var filePath = Path.Combine(_rootPath, "videos", fileName);&#xA;     var fileExtension = Path.GetExtension(filePath);&#xA;     &#xA;     // the xabe wrapper works with only mp4 extension to create thumbnail , if the file is any other format first convert it to&#xA;     //the mp4 format and then goahead with creating the thumbnail.  &#xA;     var thumbnailImageName = fileName.Replace(fileExtension, ".jpg");&#xA;     var thumbnailImagePath = Path.Combine(_rootPath, "thumbnails", thumbnailImageName);&#xA;     &#xA;            using (Stream fileStream = new FileStream(filePath, FileMode.Create)) {&#xA;                &#xA;             await file.CopyToAsync(fileStream);&#xA;            }&#xA;    Console.WriteLine(Path.Combine(_rootPath,"ffmpeg"));&#xA;    FFmpeg.SetExecutablesPath(Path.Combine(_rootPath,"ffmpeg"));&#xA;    IMediaInfo mediaInfo = await FFmpeg.GetMediaInfo(filePath);&#xA;    var videoDuration = mediaInfo.VideoStreams.First().Duration;&#xA;    IConversion conversion = await FFmpeg.Conversions.FromSnippet.Snapshot(filePath, thumbnailImagePath , TimeSpan.FromSeconds(frameTarget));&#xA;    IConversionResult result = await conversion.Start();&#xA;    MediaMetadata media = new MediaMetadata();&#xA;    media.DurationSeconds=Convert.ToInt32(videoDuration.TotalMilliseconds);&#xA;    // media.DurationSeconds=10;&#xA;    media.ThumbnailImagePath= thumbnailImagePath;&#xA;    return media;&#xA;    &#xA;    }&#xA;</mediametadata>

  &#xA;

  could you help me out with this ..many thanks

  &#xA;