Encoding H265/H264 drops frames even if not in realtime AppleProres does not even with extreme lag

Bugs
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1

Hello!

I’ve encountered an issue that I don’t quite understand. When using NOT REALTIME under load (Hog CHOP), the movie file output drops frames when encoding to compressed formats such as H.265/H.264, but it doesn’t drop a single frame when encoding to lossless Apple ProRes.

Why does this happen? Shouldn’t NOT REALTIME wait for each frame to be written regardless of the codec being used?

I’m using TD 2025.32280.

Thank you!

2

Hey, thanks for your report. Yes you are correct that should be the expectation. Do you have a sample project you can share that shows the issue?

3

encoding bug showcase.12.toe (22.1 KB)

Thanks for quick reply!

UPDATE: the issue can also be caused when using Apple Prores and does not need load from Hog CHOP to happen.

UPDATE #2: issue seams to go away when not recording audio onto the movie file

reliable way to cause it ON MY MACHINE TODAY is to spam recording as soon as previous one ends, and it is quite random, issue happens when in encode test mode also.