Tried with your options as suggested. While this gives an overall much
better CPU usage (42% instead of 18%) during playback, the steep
slowdown is still present. During the slowdown CPU usage drops
significantly down to 16%. After the critical section, speed is back to
normal with CPU usage again of 42%.
On another note, I got a double free or corruption when trying to seek
forward using "l".
Best regards,
Harald
Am 30.04.2016 um 18:47 schrieb Dan Dennedy:
You must set real_time on the consumer to enable frame threading. Try
running melt ... -consumer sdl real_time=3
On Sat, Apr 30, 2016, 9:02 AM Harald Albrecht <harald.albre...@gmx.net
<mailto:harald.albre...@gmx.net>> wrote:
Dan,
thank you very much for your quick reply!
affine is rather slow, but it does support frame-threading if you
enable that.
I've noticed that, but for me it's still good enough; it's an old
habit to use it instead of where a composite would be sufficient
too. But this is an optimization I can stick to in all the
projects to come.
My problem here is different as there is a steep degradation
exactly at a certain number of clips composited simultaneously.
First, see if playing the project with melt outside of Kdenlive
exhibits the same problem.
Playing the Kdenlive project with melt shows exactly the same
slowdown.
Next, set environment variable MLT_AVFORMAT_PRODUCER_CACHE=10 to
see if that helps with either/both melt or kdenlive.
I first did an "export MLT_AVFORMAT_PRODUCER_CACHE=10", then run
melt again with my Kdenlive project: same slowdown (meltdown?)
when reaching the "critical" section with a certain number of
clips simultaneously composed.
CPU load still is only at max of 18% for my core i7, before and
during this critical section.
Any ideas?
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