The framerate very often is just an indication of the ideal framerate, not the
actual framerate of the stream. By just using the framerate, we confuse the
rate control algorithm algorithm as multiple frames will map to the same PTS
or have durations of 0.
https://bugzilla.gnome.org/show_bug.cgi?id=749122
... instead of just counting frames. The values are supposed to be in timebase
units, not frame units. This fixes various quality problems with VP8/VP9
encoding and in general makes the encoder behave better.
Thanks to Nirbheek Chauhan for noticing this bug.
ARNR type control in libvpx has been deprecated so this commit mark the
vp8enc and vp9enc associated properties as deprecated and change their
behavior to just display a warning message.
https://bugzilla.gnome.org/show_bug.cgi?id=739476