Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

When using ffmpeg on linux, my 4.3GB 2.21 second video is being chopped down to 1.56 duration. I'm trying to reduce file size, but not lose frames.

steve@steve-OptiPlex-170L:~/Desktop$ ffmpeg -i microbe.avi microbe.mp4
ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Jun 12 2012 16:37:58 with gcc 4.6.3
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, avi, from 'microbe.avi':
  Duration: 00:02:21.80, start: 0.000000, bitrate: 242311 kb/s
    Stream #0.0: Video: rawvideo, bgr24, 1280x960, 10 tbr, 10 tbn, 10 tbc
Incompatible pixel format 'bgr24' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x9f861e0] w:1280 h:960 pixfmt:bgr24
[avsink @ 0x9f86440] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x9f7d800] w:1280 h:960 fmt:bgr24 -> w:1280 h:960 fmt:yuv420p flags:0x4
Output #0, mp4, to 'microbe.mp4':
    encoder         : Lavf53.21.0
    Stream #0.0: Video: mpeg4, yuv420p, 1280x960, q=2-31, 200 kb/s, 10 tbn, 10 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press ctrl-c to stop encoding
frame= 1164 fps=  6 q=31.0 Lsize=    3775kB time=116.40 bitrate= 265.7kbits/s    
video:3765kB audio:0kB global headers:0kB muxing overhead 0.272870%
share|improve this question
Interesting. How many frames do you expect if not 1164? Can you maybe try again with a more recent static build of FFmpeg from here: ffmpeg.gusari.org/static – the version you use is already a little outdated. Do you get the same results when specifying another codec like ffmpeg -i microbe.avi -c:v libx264 microbe.mp4 or ffmpeg -i microbe.avi -c:v libxvid microbe.mp4? –  slhck Sep 26 '12 at 16:22
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.