[FFmpeg-user] Could segments from one mpg have different audio offsets?

Nicolas George george at nsup.org
Wed Apr 16 17:14:05 CEST 2014

Le septidi 17 germinal, an CCXXII, Tom Horsley a écrit :
> What does the concat filter do if the files being
> concatenated have different offsets?

I do not understand the question. The concat filter does not work on files
but on groups of streams; these groups are called segments in the
documentation. They probably come from files, but not necessarily the same.
I do not know what you call offset.

The documentation says:

# For this filter to work correctly, all segments must start at timestamp 0.

And also:

# The concat filter will use the duration of the longest stream in each
# segment (except the last one), and if necessary pad shorter audio streams
# with silence.

(For video streams, it will only adjust the timestamps to create a gap
before the next segment to leave time for the other streams to finish; the
fps filter can later duplicate the last frame if necessary.)


  Nicolas George
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