0:575:kai@desktop ~/Desktop/timelapse [1]$ ffmpeg -i orig.timelapse -f flv -sameq -s 500x332 out_webformat.flv
FFmpeg version 0.6, Copyright (c) 2000-2010 the FFmpeg developers
  built on Oct  4 2010 22:07:50 with gcc 4.4.3
  configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --enable-static --enable-shared --cc=i686-pc-linux-gnu-gcc --disable-debug --disable-network --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libfaac --enable-nonfree --disable-indev=v4l --disable-indev=v4l2 --enable-x11grab --enable-pthreads --enable-libgsm --enable-libfaad --disable-vaapi --disable-altivec --cpu=core2 --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-avfilter-lavf --disable-stripping --enable-hardcoded-tables
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Input #0, avi, from 'orig.timelapse':
  Metadata:
    ISFT            : MEncoder SVN-r29796-4.4.4
  Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
    Stream #0.0: Video: mjpeg, yuvj422p, 600x399 [PAR 300:300 DAR 200:133], 14 tbr, 14 tbn, 14 tbc
Output #0, flv, to 'out_webformat.flv':
  Metadata:
    encoder         : Lavf52.64.2
    Stream #0.0: Video: flv, yuv420p, 500x332 [PAR 1:1 DAR 125:83], q=2-31, 200 kb/s, 1k tbn, 14 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
frame=  382 fps=120 q=2.0 Lsize=    7351kB time=27.29 bitrate=2206.9kbits/s
video:7345kB audio:0kB global headers:0kB muxing overhead 0.083754%
0:575:kai@desktop ~/Desktop/timelapse [0]$ ffmpeg -i orig.timelapse -f flv -sameq -s 400x out_webformat.flv
FFmpeg version 0.6, Copyright (c) 2000-2010 the FFmpeg developers
  built on Oct  4 2010 22:07:50 with gcc 4.4.3
  configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --enable-static --enable-shared --cc=i686-pc-linux-gnu-gcc --disable-debug --disable-network --enable-libmp3lame --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libfaac --enable-nonfree --disable-indev=v4l --disable-indev=v4l2 --enable-x11grab --enable-pthreads --enable-libgsm --enable-libfaad --disable-vaapi --disable-altivec --cpu=core2 --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-avfilter-lavf --disable-stripping --enable-hardcoded-tables
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Input #0, avi, from 'orig.timelapse':
  Metadata:
    ISFT            : MEncoder SVN-r29796-4.4.4
  Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
    Stream #0.0: Video: mjpeg, yuvj422p, 600x399 [PAR 300:300 DAR 200:133], 14 tbr, 14 tbn, 14 tbc
Incorrect frame size
0:576:kai@desktop ~/Desktop/timelapse [1]$