В сообщении от Tuesday 12 February 2019 16:25:27 Andrea paz написал(а):
I did some quick tests: CFLAGS std --> -02 TIMEcompile= about 20 min Playback --> unchecked "play every frame"; X11-OpenGL
Only edit --> framerate achivied = 30 edit + effects --> = 07
Renderig of 20 sec of mp4 video. Preset hd.youtube = 1 min 59 sec
CFLAGS new --> -03 -ffast-math TIMEcompile= about 20 min (the same!) Playback --> unchecked "play every frame"; X11-OpenGL
Only edit --> framerate achivied = 30 edit + effects --> = 13
Renderig of 20 sec of mp4 video. Preset hd.youtube = 1 min 59 sec (the same!)
Thanks for testing! It seems decoding/encoding (via ffmpeg embedded in Cinelerra) already uses assembler optimizations, but effects still can be accelerated via this 'cheap and dirty' technique. BUT, most importantly, is final video still contains all effects as intended in both cases? because there is no point in making fast but incorrect effects ...