sovereign@tetramorph:~/wedding/tmp$ ffmpeg -f image2 -r 1/5 -i Big_6898469_%04d.jpg -r 30 out.mp4
ffmpeg version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jan 24 2013 18:03:14 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[image2 @ 0x9faa240] max_analyze_duration reached

Seems stream 0 codec frame rate differs from container frame rate: 0.20 (1/5) -> 1.00 (1/1)
Input #0, image2, from 'Big_6898469_%04d.jpg':
  Duration: 00:24:15.00, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: mjpeg, yuvj444p, 750x498 [PAR 300:300 DAR 125:83], 0.20 fps, 1 tbr, 0.20 tbn, 0.20 tbc
Incompatible pixel format 'yuvj444p' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x9fad600] w:750 h:498 pixfmt:yuvj444p
[avsink @ 0x9fa8480] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x9fa88e0] w:750 h:498 fmt:yuvj444p -> w:750 h:498 fmt:yuv420p flags:0x4
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf53.21.1
    Stream #0.0: Video: mpeg4, yuv420p, 750x498 [PAR 1:1 DAR 125:83], q=2-31, 200 kb/s, 30 tbn, 30 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press ctrl-c to stop encoding
[buffer @ 0x9fad600] Changing frame properties on the fly is not supported.
    Last message repeated 289 times  33kB time=0.03 bitrate=8024.4kbits/s
frame=    1 fps=  0 q=5.3 Lsize=      33kB time=0.03 bitrate=8211.8kbits/s
video:33kB audio:0kB global headers:0kB muxing overhead 2.332815%
sovereign@tetramorph:~/wedding/tmp$