id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
1992,Create thumbnail error,bfi,,"Summary of the bug:

I have a bunch of flvs that I scale and convert to mp4, then create a thumbnail. All the mp4s are created fine, but 9 thumbnails out of 22 fail. All flvs are encoded the same, but are of different sizes.

How to reproduce:
{{{
% ffmpeg -i 78d04424cb944fe6bf8a42d88004d7f7.mp4 -vf thumbnail -frames:v 6 78d04424cb944fe6bf8a42d88004d7f7.png

ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 25 2012 12:21:26 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52.  9.100 / 52.  9.100
  libavcodec     54. 77.100 / 54. 77.100
  libavformat    54. 37.100 / 54. 37.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 23.102 /  3. 23.102
  libswscale      2.  1.102 /  2.  1.102
  libswresample   0. 17.101 /  0. 17.101
  libpostproc    52.  2.100 / 52.  2.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '78d04424cb944fe6bf8a42d88004d7f7.mp4':
  Metadata:
  major_brand     : isom
  minor_version   : 512
  compatible_brands: isomiso2avc1mp41
  encoder         : Lavf54.37.100
  Duration: 00:00:01.44, start: 0.000000, bitrate: 198 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 404x320, 191 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
  Metadata:
  handler_name    : VideoHandler
  Output #0, image2, to '78d04424cb944fe6bf8a42d88004d7f7.png':
  Metadata:
  major_brand     : isom
  minor_version   : 512
  compatible_brands: isomiso2avc1mp41
  encoder         : Lavf54.37.100
  Stream #0:0(und): Video: png, rgb24, 404x320, q=2-31, 200 kb/s, 90k tbn, 25 tbc
  Metadata:
  handler_name    : VideoHandler
  Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> png)
  Press [q] to stop, [?] for help
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=   0.0kbits/s    
  video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead nan%
  Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

}}}",enhancement,closed,wish,avfilter,git-master,fixed,thumbnail,,,,0,0