Encoding with GPU AMD VCE H265 Washed colours

[dragonsol]

Hi all. I used 'search' before post, i dont see nothing similar.

I have a collection of my all-life videos (more than 15TB), and i want send to trash my old vhs, dvds etc in h264 x264.

I started to convert all to x265 with handbrake last version RF 19 and compression slowest. (it takes 14-40hours for movie x_x). With my gpus (amd rx 590) is faster, but when finish and i go to TV for show the video, colours has washed out.

Anybody know how configure for dont lost colours?. With cpu is too slow (i have 2x ryzen 5 3600 and 2x rx 590).

I think is good explained. Thank you all for your time.

[Cary Knoop]

I started to convert all to x265 with handbrake last version RF 19 and compression slowest. (it takes 14-40hours for movie x_x).
Why use the slowest compression?

Could you share your command line for both H.265 on CPU and GPU?

[Rumbah]

Sounds like a levels problem to me.

I guess your videos are limited range but the GPU encoder encodes as full range without conversion.

I don't know handbrake but look if there is some switch to change from full (0-255) to limited (16-235) or vice versa and test again.

[NikosD]

With my gpus (amd rx 590) is faster, but when finish and i go to TV for show the video, colours has washed out. Expect all HW encoders to be worse in quality and with significant less parameters to play with in order to customize the output, than CPU encoders.

nVidia's Turing HW encoder has the best quality, followed by Pascal and Intel.
AMD has the worst.

If you stick to AMD, try VCEEnc app from rigaya as a cmd stand-alone app or inside StaxRip (Hybrid) which have a rich GUI and easier environment to work.
For AMD HW encoders, you could also try A's Video Converter.

All these tools are free of course.

[benwaggoner]

Why use the slowest compression?
And do you mean --preset slower or --preset placebo. Presumably slower.