[video mixing] playback with multiple clips in the timeline is really slow
@jeff
Submitted by Jeff F.T. Assigned to Jeff F.T. @jeff
Description
Since video mixing (ie: compositing, fades/crossfades) was implemented in the pitivi 0.13.4 release cycle, playback performance has dropped significantly. This becomes very apparent when you have more than one clip playing at the same time (ie: two clips on two different layers), whether one is transparent or not: frames are dropped, etc.
I'm not sure what can be done for now, but filing this bug report so that we can point users to this, have a reminder, and so that it shows up with the "perf" tag.
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=610626