ffmpeg -r 6 -f image2 -i img%d.jpg out.avi
ffmpeg version 0.7.6, Copyright (c) 2000-2011 the FFmpeg developers
  built on Oct 28 2011 11:52:30 with gcc 4.2.1 20070719  [FreeBSD]
  configuration: --prefix=/usr/local --mandir=/usr/local/man --enable-shared --enable-gpl --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable-memalign-hack --enable-runtime-cpudetect --cc=cc --extra-cflags='-msse -I/usr/local/include/vorbis -I/usr/local/include' --extra-ldflags='-L/usr/local/lib ' --extra-libs=-pthread --disable-debug --disable-libaacplus --disable-indev=alsa --disable-outdev=alsa --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libcelt --disable-libdirac --disable-libfaac --enable-libfreetype --enable-frei0r --disable-libgsm --enable-libmp3lame --enable-libopencv --enable-libopenjpeg --disable-librtmp --enable-libschroedinger --disable-ffplay --disable-libspeex --enable-libtheora --disable-vaapi --disable-vdpau --disable-libvo-aacenc --disable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid
  libavutil    50. 43. 0 / 50. 43. 0
  libavcodec   52.122. 0 / 52.122. 0
  libavformat  52.110. 0 / 52.110. 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
[image2 @ 0x805422020] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'img%d.jpg':
  Duration: 00:01:09.16, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: mjpeg, yuvj420p, 704x576 [PAR 72:72 DAR 11:9], 6 fps, 6 tbr, 6 tbn, 6 tbc
File 'out.avi' already exists. Overwrite ? [y/N] y
Incompatible pixel format 'yuvj420p' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x805449f00] w:704 h:576 pixfmt:yuvj420p tb:1/1000000 sar:72/72 sws_param:
[buffersink @ 0x805449f80] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x805449fe0] w:704 h:576 fmt:yuvj420p -> w:704 h:576 fmt:yuv420p flags:0x4
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf52.110.0
    Stream #0.0: Video: mpeg4, yuv420p, 704x576 [PAR 1:1 DAR 11:9], q=2-31, 200 kb/s, 6 tbn, 6 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
[mjpeg @ 0x805410020] overread 6    1327kB time=00:00:37.50 bitrate= 289.9kbits/s
[mjpeg @ 0x805410020] EOI missing, emulating
[mjpeg @ 0x805410020] overread 69
[mjpeg @ 0x805410020] overread 55   1521kB time=00:00:45.33 bitrate= 274.9kbits/s
[mjpeg @ 0x805410020] overread 65
[mjpeg @ 0x805410020] overread 64
[mjpeg @ 0x805410020] overread 9
[mjpeg @ 0x805410020] overread 40
[mjpeg @ 0x805410020] overread 46
[mjpeg @ 0x805410020] overread 9
[mjpeg @ 0x805410020] EOI missing, emulating
[mjpeg @ 0x805410020] overread 27
[mjpeg @ 0x805410020] overread 75
[mjpeg @ 0x805410020] overread 77
[mjpeg @ 0x805410020] overread 66
[mjpeg @ 0x805410020] overread 46
frame=  403 fps= 90 q=15.4 Lsize=    1846kB time=00:01:09.16 bitrate= 218.6kbits/s
video:1830kB audio:0kB global headers:0kB muxing overhead 0.849106%