[FFmpeg-user] VFR jpg files to MJPEG video

Carl Eugen Hoyos cehoyos at ag.or.at
Thu Feb 6 10:09:04 CET 2014

MiHe <video-server <at> aab.sk> writes:

> i have JPG files with millisecond timestamps in the 
> file name,

How do the file names look like?

How are the files produced?
Is this common hardware?

> from a VFR ip camera, avg 0.5 - 2 FPS
> i can feed these through stdin or rename files so 
> they are numbered (image2) but the PTS is not correct 
> because of the VFR.
> is it possible to construct a playable video file 
> (MP4/AVI/MKV), which uses MJPEG codec(without 
> transcoding) with these exact VFR timestamps ?

You can write a shell script that duplicates the input 
frames to achieve cfr, but the missing feature may be 
easy to implement within FFmpeg if the file format is 
well defined.

Carl Eugen

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