[FFmpeg-user] syncing live streams when mosaicing

Carl Eugen Hoyos cehoyos at ag.or.at
Wed Feb 6 12:42:30 CET 2013

Daniel Oberhoff <daniel <at> danieloberhoff.de> writes:

> On 2013-02-06 10:01:19 +0000, Carl Eugen Hoyos <cehoyos <at> ag.or.at> said:
> > Daniel Oberhoff <daniel <at> danieloberhoff.de> writes:
> > 
> >> now we know the streams are time stamped correctly
> >> using the pts (in an h264 stream).

(Note that this sentence made me think you would 
immediately see if the pts in FFmpeg are correct or not.)

> >> can ffmpeg
> >> somehow use the pts to avoid the shift?
> > 
> > Could you try to verify if FFmpeg's H264
> > decoder actually correctly decodes the pts?
> Ok, when I run with -loglevel debug I get outputs like this (on a 
> single stream):

You can also use -debug_ts, it should print all 
relevant timestamp information.

Carl Eugen

More information about the ffmpeg-user mailing list