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quietvoid · 30th March 2021, 14:38

There's no simple way to use the tool for cropped video, you have to edit the code.

Also, using the RPU with x265 to transcode might end up with some desyncs due to the way x265 is inserting the metadata back.
Unfortunately I don't think there is a solution for that, other than inserting the metadata after transcoding.
See https://github.com/quietvoid/dovi_to...ment-803652617

Now those desyncs are not always visible in playback, but they're still there.

For HDR10+ the same desync issue is present. For cropped video, the metadata is supposedly resolution agnostic and hopefully the analysis is done on the active image area only.
So it should work in theory,

I'm curious to know how streaming services make use of x265's RPU insertion. There has to be some predicting the transcode's decoding order somehow, to make sure the RPU is synced throughout.
Though I've had artifacts with Dolby Vision on Netflix as well, so maybe they don't bother syncing either.

30th March 2021, 14:38	#40 \| Link
quietvoid Registered User Join Date: Jan 2019 Location: Canada Posts: 574	There's no simple way to use the tool for cropped video, you have to edit the code. Also, using the RPU with x265 to transcode might end up with some desyncs due to the way x265 is inserting the metadata back. Unfortunately I don't think there is a solution for that, other than inserting the metadata after transcoding. See https://github.com/quietvoid/dovi_to...ment-803652617 Now those desyncs are not always visible in playback, but they're still there. For HDR10+ the same desync issue is present. For cropped video, the metadata is supposedly resolution agnostic and hopefully the analysis is done on the active image area only. So it should work in theory, I'm curious to know how streaming services make use of x265's RPU insertion. There has to be some predicting the transcode's decoding order somehow, to make sure the RPU is synced throughout. Though I've had artifacts with Dolby Vision on Netflix as well, so maybe they don't bother syncing either. __________________ LG C2 OLED \| GitHub Projects Last edited by quietvoid; 30th March 2021 at 14:50.