[Bug 720104] videorate: Should be able to duplicate frames in a live stream

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=720104

Arjen Veenhuizen <arjen.veenhuizen at tno.nl> changed:

           What    |Removed                     |Added
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                 CC|                            |arjen.veenhuizen at tno.nl

--- Comment #9 from Arjen Veenhuizen <arjen.veenhuizen at tno.nl> ---
So I ran into this problem, which is described in great detail by Andreea, but
the attached patch no longer cleanly applies to git master. I've attached a new
version of Andreea's patch which is compatible with 1.7.90 for future
reference. I did not, however, make the changes suggested by Sebastian and
Nicolas.

Furthermore, Andreea's patch uses the incoming framerate to determine whether
the timeout should fire but this does not solve the problem for forced low
framerates (e.g. when the input framerate is 1 fps and the output is 25fps,
this patch does not help at all since you would still wait a multiple
("timeout"  property) of input-frames). In that case, I suggest we use the
output framerate to set the timer instead. I'll  start thinking on how to
tackle that use case.

Thanks and credits @Andreea for the patch!

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