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16.12.2 Chrome still fail to utilize hybrid decode for VP9 content on RX460

Question asked by vonchen on Dec 21, 2016

I have a thread to ask this VP9 cpu usage issue:

16.12.1 VP9 Decode Acceleration still high CPU usage on RX460

Now it turns out that beacuse of Chrome always fail to utilize VP9 in my configuration. So I open a new thread to discuss this issue.

 

Base on this code(I got this from reddit) :

https://cs.chromium.org/chromium/src/content/public/common/content_switches.cc?sq=package:chromium&l=1055

I have to use this command to tell Chrome to use right VPx codec in AMD's driver configuration:

chrome.exe --enable-accelerated-vpx-decode=2

By this way I have low CPU uasge and smooth VP9 4kfps60.

 

With --enable-accelerated-vpx-decode=2

LMNY2N0.jpg

 

If I launch chrome from desktop icon link which runs chrome.exe without --enable-accelerated-vpx-decode=2 argument,then I got very high cpu usage and not smooth playing. If I set it to 1 or 3 is the same situation, so it turns out that chrome can not detect AMD's driver configuration on VPx by unknown reason.

 

Without --enable-accelerated-vpx-decode=2

NsMzP6u.jpg

 

Already reported to AMD issue form.

 

CPU: Intel E3-1230v2

Motherboard:Gigabyte B75M-D3H rev1.2 /BIOS F15

RAM: 20GB DDR3 1333 RAM

GPU: Powercolor RX460 2G red dragon

OS: Windows 10 64bit 1670

Driver: Crimson ReLive 16.12.2

Display: Benq GL2450 1920x1080@60Hz DVI

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