Encoding speed slower in 2.7.8 than 2.6.21

[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.