[FFmpeg-user] frame grabbing from MP4 file takes too long (says: muxing overhead -inf%)

Carl Eugen Hoyos cehoyos at ag.or.at
Mon Nov 21 00:56:09 CET 2011

zeo <zeoxyvid <at> gmail.com> writes:

> $ ./ffmpeg.exe -i input.mp4  -ss 00:01:34  -vframes 1 -y out.jpg

>   Duration: 00:01:21.57

Are you trying to seek over 90 seconds into a video that is less than 82 seconds
long and ask why the output file is empty?
(You could try ffmpeg -i input.mp4 -f null - to find out how long the sample
really is, above line is not necessarily correct.)

Carl Eugen

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