[FFmpeg-user] Negative start

Carl Eugen Hoyos cehoyos at ag.or.at
Sat Aug 30 13:14:24 CEST 2014

Marcus Engene <ffmpeg2 <at> engene.se> writes:

>    configuration: --sws-max-filter-size=512 --enable-gpl 
> --enable-libmp3lame --enable-shared --enable-nonfree 
> --enable-libx264 --enable-libfaac --enable-filter=movie 
> --enable-libvpx --enable-pthreads --enable-libtheora 
> --enable-libvorbis

"--enable-filter=movie" and "--enable-pthreads" 
are default, you can remove them.
Note that if pthreads or the movie filter are 
not available, your configure line will not fail 
(the options are just nops).

And note that a better aac encoder than libfaac exists.

>    Duration: 00:00:19.62, start: -6.607608, bitrate: 35168 kb/s

The input file has a negative start time.
What is wrong with a negative start time?

Carl Eugen

More information about the ffmpeg-user mailing list