vo=gpu-next has no effect on DV format files with hwdec=mediacodec-copy

Important Information

Reproduction steps

I'm using a custom build mpv-android with the latest libplacebo (> 4.192.0) and ffmpeg (>5.0). The build is from the following locations:

https://www.reddit.com/r/AV1/comments/v55ukc/custom_build_the_endgame_is_approaching_leading/
https://github.com/Quackdoc/mpv-android/tree/testvk

I'm using the following config:

vo=gpu-next
gpu-api=vulkan
vd-lavc-film-grain=gpu

Only when using software decoding the color tone mapping is correct for a DV format file. Once I changed to hardware decoding (mediacodec-copy), the color tone is still incorrect. I'm using a samsung Snapdragon 8 Gen 1 device with no DV license.

Expected behavior

The color tone should be normal same as using software decoding.

Actual behavior

Instead the color is still purple or green.

Log file

Sample files

Any dolby vision format files.

Start by reproducing the reported configuration with vo=gpu-next, gpu-api=vulkan, and hwdec=mediacodec-copy, comparing it with software decoding on a Dolby Vision sample. Collect the missing log and determine whether the color output matches the expected software-decoding result; done means DV colors render normally with mediacodec-copy.