[FFmpeg-user] Negative start

[Carl Eugen Hoyos]

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

Unrelated:
"--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