[Bug 765549] x265enc: problem with framerate=0/1 when re-encoding from rtp

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=765549

Tim-Philipp Müller <t.i.m at zen.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t.i.m at zen.co.uk
          Component|common                      |gst-plugins-bad
            Summary|x265enc : Problem while     |x265enc: problem with
                   |encoding to h265 from       |framerate=0/1 when
                   |udpsrc                      |re-encoding from rtp

--- Comment #1 from Tim-Philipp Müller <t.i.m at zen.co.uk> ---
The problem seems to be that the input framerate is 0/1 (variable frame rate).

x265 does not seem to support this yet:
https://bitbucket.org/multicoreware/x265/issues/106/support-vfr

Not sure how to best handle this.

- if we disallow 0/1 as framerate than people will get link failures or
not-negotiated later

- we could accept it but error out with an informative error message

- we could make the encoder base class normalise the input videorate-style,
just like audioencoder does for audio input

- we could set some framerate like 50/60fps or so and hope things will still
work well enough if we feed it fewer frames than that.

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