[FFmpeg-user] ffmpeg cannot capture h264 from webcam C920

[andrea]

Hi,

I have the same issue reported here

http://ffmpeg.org/pipermail/ffmpeg-user/2013-May/015046.html
and
http://ffmpeg.org/pipermail/ffmpeg-user/2013-July/016243.html

I have tried ffmpeg 1.2.2 on fedora and 2.0.1 on raspberry (same result).
I have only tried ffplay 1.2.2 on fedora.

if I use ffplay I get some output (a few seconds then still).



ffplay -f v4l2 -input_format h264 /dev/video0

ffplay version 1.2.2 Copyright (c) 2003-2013 the FFmpeg developers
  built on Aug  4 2013 08:23:55 with gcc 4.8.1 (GCC) 20130603 (Red Hat 4.8.1-1)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg
--incdir=/usr/include/ffmpeg --libdir=/usr/lib --mandir=/usr/share/man --arch=i686 --optflags='-O2
-g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4
-grecord-gcc-switches -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables' --enable-bzlib
--disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcelt
--enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame
--enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse
--enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2
--enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter
--enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug
--disable-stripping --shlibdir=/usr/lib --cpu=i686 --enable-runtime-cpudetect
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
[video4linux2,v4l2 @ 0xb1b025c0] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 3512.615770, bitrate: N/A
    Stream #0:0: Video: h264 (Constrained Baseline), yuvj420p, 640x480 [SAR 1:1 DAR 4:3], -5 kb/s,
30 fps, 30 tbr, 1000k tbn, 60 tbc
3516.23 A-V:  0.000 fd=  10 aq=    0KB vq=   77KB sq=    0B f=8/8