Sorry for my late reply to this thread, been busy this week.

My tests show that with the screen captures recorded with OBS (most recent one is 20mb/s at 1080p60, h.264 in a FLV container) have trouble transitioning. Hard cuts fair slightly better, but still present some slowness. I'll conduct more tests with different files, as well as on my laptop (which is running a straight SSD, unlike my desktop which runs the SSD as a cache device for a hard drive using bcache).

Compiling latest git did not show any improvement (even with -O2), and I use the official cin-gg package for Arch Linux normally.

On Sun, Mar 3, 2019 at 8:17 PM, Phyllis Smith <phylsmith2017@gmail.com> wrote:

Andrea, I think I might have confused the problem when your computer was acting strangely or when you reported the mkv slowness. Anyway, from the information you provided and the dropbox transition.mp4, it looks like transitions are working as expected with your normal installation. Thanks for checking, gg/pys

With my normal installation I have the following results:

https://www.dropbox.com/s/h8p4tyvx2snwiyi/transition.mp4?dl=0

I summarize the results:

mp4 --> wipe --> png --> dissolve --> 3gp/cut/3gp --> slide --> mp4
30 29 29 21 (png?) 30 28 30 29 30 Fps

I can tell I don't have any particular problems.