1733933 - h264/avc video colors are washed out using vaapi HW decoder

Status: RESOLVED DUPLICATE of bug 1743577

(Core :: Audio/Video: Playback, defect, P5)

Description

[b.desconocido]

Attachment: ISOPALE.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0

Steps to reproduce:

I set h264/avc acceleration settings media.ffmpeg.vaapi.enabled to true

Using stock AMD GPU driver on Ubuntu 21.04.
Test video: any Youtube video with codec forced to h264
Desktop: GNOME/Wayland.
GPU: Radeon RX 470 8GB
Monitor: AOC U2777PQU (30bpp on Windows)
Scaling: 200%
Resolution: UHD

Actual results:

When media.ffmpeg.vaapi.enabled is set to true, colors on any h264/avc videos are washed out, brightness and contrast looks way off. No other content except HW accelerated videos is affected. If I revert this option and restart the FF, colors are back to normal. See the comparison in the attachments, top half with vaapi enabled, bottom - disabled.

Expected results:

No washed/pale colors, normal brightness and contrast levels

Comment 1

[b.desconocido]

Update. Tested on laptop with Iris 540 graphics (vaapi implementation is "indel-media-driver"), colors are washed out too.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[vinceying113]

I can confirm this bug on two GPUs. The color space is wrong using VAAPI.

GPU #1
Description AMD STONEY (DRM 3.41.0, 5.13.0-22-generic, LLVM 12.0.1)
Vendor ID 0x1002
Device ID 0x98e4
Driver Vendor mesa/radeonsi
Driver Version 21.2.2.0

GPU #2
Description Mesa DRI Intel(R) HD Graphics (BYT)
Vendor ID 0x8086
Device ID 0x0f31
Driver Vendor mesa/i965
Driver Version 21.2.2.0

Comment 4

[vinceying113]

Attachment: No VAAPI.png

In this screenshot the video is correctly rendered - black level in the video is the same as the background frame. VAAPI disabled.

Comment 5

[vinceying113]

Attachment: VAAPI.png

In this screenshot the video is incorrectly rendered - black level in the video is not black and is different from the background frame. VAAPI enabled.