gistfile1.txt

ffmpeg -ss 3554 -i Benjamin_Bayart_25092009_soir.flv -vframes 1 -an -r 1 -s 231x106 -vf scale=231:-1 Benjamin_Bayart_25092009_soir.flv.jpg
ffmpeg version 0.7.12, Copyright (c) 2000-2011 the FFmpeg developers
  built on Apr 11 2012 07:40:07 with gcc 4.4.5
  configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac --disable-decoder=libdirac --enable-libfreetype --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-libvpx --enable-librtmp --extra-libs=-lgcrypt --disable-altivec --disable-armv5te --disable-armv6 --disable-vis
  libavutil    50. 43. 0 / 50. 43. 0
  libavcodec   52.123. 0 / 52.123. 0
  libavformat  52.111. 0 / 52.111. 0
  libavdevice  52.  5. 0 / 52.  5. 0
  libavfilter   1. 80. 0 /  1. 80. 0
  libswscale    0. 14. 1 /  0. 14. 1
  libpostproc  51.  2. 0 / 51.  2. 0
[flv @ 0x633940] invalid stream
[flv @ 0x633940] Estimating duration from bitrate, this may be inaccurate

Seems stream 1 codec frame rate differs from container frame rate: inf (1/0) -> 25.00 (25/1)
Input #0, flv, from 'Benjamin_Bayart_25092009_soir.flv':
  Metadata:
    duration        : 7109
    width           : 360
    height          : 288
    videodatarate   : 400
    framerate       : 25
    videocodecid    : 4
    audiodatarate   : 64
    audiodelay      : 0
    audiocodecid    : 2
    canSeekToEnd    : true
  Duration: 01:58:29.44, start: 0.000000, bitrate: 64 kb/s
    Stream #0.0: Audio: mp3, 22050 Hz, stereo, s16, 64 kb/s
    Stream #0.1: Video: vp6f, yuv420p, 360x288, 25 tbr, 1k tbn
Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
[buffer @ 0x636a80] w:360 h:288 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
[scale @ 0x633860] w:360 h:288 fmt:yuv420p -> w:231 h:106 fmt:yuv420p flags:0x4
[scale @ 0x638aa0] w:231 h:106 fmt:yuv420p -> w:231 h:106 fmt:yuvj420p flags:0x4
Output #0, image2, to 'Benjamin_Bayart_25092009_soir.flv.jpg':
  Metadata:
    duration        : 7109
    width           : 360
    height          : 288
    videodatarate   : 400
    framerate       : 25
    videocodecid    : 4
    audiodatarate   : 64
    audiodelay      : 0
    audiocodecid    : 2
    canSeekToEnd    : true
    encoder         : Lavf52.111.0
    Stream #0.0: Video: mjpeg, yuvj420p, 231x106, q=2-31, 200 kb/s, 90k tbn, 1 tbc
Stream mapping:
  Stream #0.1 -> #0.0
Press [q] to stop, [?] for help
frame=    1 fps=  0 q=4.4 Lsize=      -0kB time=00:00:01.00 bitrate=  -0.2kbits/s
video:4kB audio:0kB global headers:0kB muxing overhead -100.485116%