[FFmpeg-devel] (sponsored) feature request

Kieran Kunhya kierank at obe.tv
Thu Jul 3 15:06:47 CEST 2014

> FFmpeg takes time to startup, and that time is not always the same. (Between
> some 200 and 450 Msecs on my system)
> Thus, by feeding a TC in the commandline, it's impossible to get a correct
> timestamp on output when encoding a live stream, as by the time FFmpeg has
> the first frame to work on, a couple of frames have already passed.
> My case is to record from several inputs at the same time, and i need
> matching TC on all streams (Thus, NOT the same start TC value on all, as the
> streams never start at exactly the same time.).
> More clear now?

How do you know your input streams are locked to the same master clock
and where are the timecodes located in such a stream?

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