#1339: Auto insert fps filter as adapter for overlay filter inputs with
different
framerates
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Reporter: annorax | Owner:
Type: enhancement | Status: new
Priority: wish | Component: avfilter
Version: git-master | Resolution:
Keywords: fps overlay | Blocked By:
filter | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Comment (by Cigaes):
I think Reimar explained pretty well why your suggestion is not a good
idea and is, in fact, not properly defined in the first place. Please
remember that filters must be designed for general use, not for any
specific use case.
Currently, the overlay filters produces one output frame for each input
frame on its "main" input. It uses the timestamps to determiner which
overlay frame must go on the main frame.
Adding an option to output a frame also when the overlay changes, like
Reimar suggests, is of course possible.
As far as I can tell your claim that it ignores the timestamps on the
overlay input is just not true, and I can confirm that two video at
different frame rates with visible synchronization stay on sync. The worst
that happens is an off-by-one bug that is already underway of being fixed.
Please, be more specific about the actual problems you experience and are
trying to solve.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1339#comment:6>
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