[FFmpeg-user] Capturing video from old webcam

[Paweł Kajak]

2015-02-05 15:44 GMT+01:00 Carl Eugen Hoyos <cehoyos at ag.or.at>:

> Paweł Kajak <pkajak <at> gmail.com> writes:
>
> > ffmpeg version 2.1.5
> >   built on Feb  5 2015 03:11:40 with gcc 4.8.2
>
> I am curious:
> Why are you building a fifteen-months old version
> of FFmpeg today? Is there a bug in newer versions
> that we don't know of?
> Your issue was fixed a year ago, please always
> test current FFmpeg git head before reporting an
> issue here.
>
> Unrelated: The following configure options have
> no effect, consider to remove them:
> --enable-pthreads
> --enable-postproc
> --enable-avfilter
> --arch=x86_64
>
> As said, a report if BA81 works (with current git
> head) is welcome!
>
> Please do not top-post here, Carl Eugen
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>

Hi Carl,

Well I've installed it from available Slackbuild and I didn't verify if the
ffmpeg version there is latest one - my mistake. After updating it is much
better:
BA81 is now supported with bayer_bggr8.

ffmpeg version 2.5.3 Copyright (c) 2000-2015 the FFmpeg developers
  built on Feb  5 2015 20:29:27 with gcc 4.8.2 (GCC)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
--docdir=/usr/doc/ffmpeg-2.5.3/html --mandir=/usr/man --disable-debug
--enable-shared --disable-static --enable-pthreads --enable-libtheora
--enable-libvorbis --enable-gpl --enable-version3 --enable-postproc
--enable-swscale --enable-x11grab --enable-avfilter --enable-gnutls
--enable-libcdio --enable-libssh --arch=x86_64 --enable-libmp3lame
--enable-libx264
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[video4linux2,v4l2 @ 0x138b480] Raw       : Unsupported :
S910 : 160x120 176x144 320x240 352x288
[video4linux2,v4l2 @ 0x138b480] Raw       : bayer_bggr8 :
BA81 : 160x120 176x144

I'm able to record into MKV and couple other formats however it is still
not possible to record into AVI.

ffmpeg version 2.5.3 Copyright (c) 2000-2015 the FFmpeg developers
  built on Feb  5 2015 20:29:27 with gcc 4.8.2 (GCC)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
--docdir=/usr/doc/ffmpeg-2.5.3/html --mandir=/usr/man --disable-debug
--enable-shared --disable-static --enable-pthreads --enable-libtheora
--enable-libvorbis --enable-gpl --enable-version3 --enable-postproc
--enable-swscale --enable-x11grab --enable-avfilter --enable-gnutls
--enable-libcdio --enable-libssh --arch=x86_64 --enable-libmp3lame
--enable-libx264
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
[video4linux2,v4l2 @ 0x6af6c0] Time per frame unknown
[video4linux2,v4l2 @ 0x6af6c0] The v4l2 frame is 2 bytes, but 25344 bytes
are expected
Input #0, video4linux2,v4l2, from '/dev/video1':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: rawvideo ([186]BG[8] / 0x84742BA), bayer_bggr8,
176x144, 1000k tbr, 1000k tbn, 1000k tbc
[avi @ 0x6b0ae0] Frame rate very high for a muxer not efficiently
supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
Output #0, avi, to 'test.avi':
  Metadata:
    ISFT            : Lavf56.15.102
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 176x144,
q=2-31, 200 kb/s, 65535 fps, 600 tbn, 65535 tbc
    Metadata:
      encoder         : Lavc56.13.100 mpeg4
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
[avi @ 0x6b0ae0] Too large number of skipped frames 627894 > 60000
av_interleaved_write_frame(): Invalid argument
[avi @ 0x6b0ae0] Too large number of skipped frames 627874 > 60000
frame=    2 fps=0.0 q=2.0 Lsize=       7kB time=00:17:26.49 bitrate=
0.1kbits/s
video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 231.590607%
Conversion failed!

Are there any extra arguments that I should use?
Regards and thanks for your help,
Pawel Kajak