# 13820 frames in 1752 seconds is 7.89 fps
> ffmpeg -f image2 -i ./test-%05d.png -r 7.89 -y input.mp4
ffmpeg version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:33 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.
Input #0, image2, from './test-%05d.png':
  Duration: 00:09:12.84, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: png, rgb24, 640x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
Incompatible pixel format 'rgb24' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x1ab7380] w:640 h:480 pixfmt:rgb24
[avsink @ 0x1ab76a0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x1ab3d00] w:640 h:480 fmt:rgb24 -> w:640 h:480 fmt:yuv420p flags:0x4
Output #0, mp4, to 'input.mp4':
  Metadata:
    encoder         : Lavf53.21.0
    Stream #0.0: Video: mpeg4, yuv420p, 640x480, q=2-31, 200 kb/s, 789 tbn, 7.89 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press ctrl-c to stop encoding
[buffer @ 0x1ab7380] Changing frame properties on the fly is not supported. dup=0 drop=328
    Last message repeated 7967 times851kB time=552.09 bitrate= 205.5kbits/s dup=2370 drop=3845
frame= 4363 fps= 58 q=2.9 Lsize=   13910kB time=552.98 bitrate= 206.1kbits/s dup=2370 drop=3860
video:13874kB audio:0kB global headers:0kB muxing overhead 0.261565%
[paul-crown]~/oDesk/Paleo/video> vlc input.mp4
VLC media player 2.0.3 Twoflower (revision 2.0.2-93-g77aa89e)
[0xcf0138] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
TagLib: MP4: No audio tracks
Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 61: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/65-droid-sans-fonts.conf", line 96: Having multiple values in <test> isn't supported and may not works as expected
Xlib:  extension "RANDR" missing on display ":0.0".
TagLib: MP4: No audio tracks

>mediainfo input.mp4
General
Complete name                            : input.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom
File size                                : 13.6 MiB
Duration                                 : 9mn 12s
Overall bit rate                         : 206 Kbps
Writing application                      : Lavf53.21.0

Video
ID                                       : 1
Format                                   : MPEG-4 Visual
Format profile                           : Simple@L1
Format settings, BVOP                    : No
Format settings, QPel                    : No
Format settings, GMC                     : No warppoints
Format settings, Matrix                  : Default (H.263)
Codec ID                                 : 20
Duration                                 : 9mn 12s
Duration_LastFrame                       : -125ms
Bit rate                                 : 206 Kbps
Width                                    : 640 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Constant
Frame rate                               : 7.890 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.085
Stream size                              : 13.5 MiB (100%)
Writing library                          : Lavc53.35.0