[FFmpeg-user] cutting at keyframes?

[Carl Eugen Hoyos]

Gregory1234 <gregory.aimo <at> gmail.com> writes:

> Ultimately I want the output file to start with a keyframe 
> so that it will play in sync - but it appears as if the 
> input file does not start with a keyframe.

I don't think FFmpeg is able to produce an output file that 
does not start with a keyframe (when encoding which is what 
you do above).
In other words: I am 100% sure your output file starts with 
a keyframe.

Is your output file out-of-sync if you play with vlc, ffplay, 
MPlayer or QuickTime? (If it plays out-of-sync with 
QuickTime, please also test the others.)

Carl Eugen