News:

--

Main Menu

Encoding speed slower in 2.7.8 than 2.6.21

Started by Xaar, March 10, 2021, 12:16:51 PM

Previous topic - Next topic

eumagga0x2a

I'm going to create a 1280x720 sample and retry. The size can actually matter.

eumagga0x2a

With a 1280x720 sample of ~10 minutes duration, I can fully confirm your findings.

2.7.8 with MT: 222 fps
2.7.8 w/o MT: 174 fps
2.7.1 MT n/a: 309 fps

Pretty remarkable.

Xaar

So, any suggestion to make 2.7.8 as fast as 2.6.21?

eumagga0x2a

No, the performance degradation seems to be related to upstream changes in FFmpeg during the 3.x.x --> 4.0 transition. It is beyond my skills to investigate this and the importance of the issue cannot be lower (the output is not corrupted, the speed is still good, the affected codecs are obsolete).

Unless a future update to FFmpeg 4.4 or 4.3.x improves the speed, I don't think I am going to take any action.