Automatic inactivate H264 hardware decoding

riverman2 · Post by **riverman2** » August 18th, 2015, 7:38 pm

Often after a while when I have seen a few clips on YT, Firefox automatic inactivate H264 hardware decoding on the fly.
So now to my question, how to force Firefox not todo so and why does it happen?
bug, because its untrue and should never inactivate H264 hardware decoding on the fly without an warning

http://s28.postimg.org/hcoi0avbh/h264.jpg

therube · Post by **therube** » August 19th, 2015, 7:28 am

(Not that understand such things, but how would YT interactively disable a browser setting like that?)

riverman2 · Post by **riverman2** » August 19th, 2015, 9:00 am

I don't think YT interactively disable hardware decoding but Firefox itself automatic does for some reason and I don't know why it triggers.
But I believe it some sort of built-in sensor in Firefox that triggers when it feel GPU load is to high but it isn't.

From what i can see the max load on GPU is around 40% when it works and cpu around 15%
When it doesn't work GPU video load is 0% and Firefox consume 100% from CPU.

what I can tell more is that GPU doesn't crash or anything like that, other windows media application doesn't show anything wrong related to H264 hardware decoding or get interrupt. To get back H264 hardware decoding I must close the active Firefox session and open a new one again.

Edit: Related
1178098 - "Supports Hardware H264 Decoding" in about:support is "false" on supporting hardware
1198202 - DXVA disables itself on nVidia GTX GPU

Dun · Post by **Dun** » October 2nd, 2015, 9:12 am

Please fix this.
viewtopic.php?f=38&t=2964731

dfoulkes · Post by **dfoulkes** » October 2nd, 2015, 10:25 am

Dun wrote:Please fix this.
viewtopic.php?f=38&t=2964731

Just a FYI as mentioned when you registered ... we are not Mozilla... we are users helping users... that's all.....

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Dun · Post by **Dun** » October 2nd, 2015, 11:13 am

Ok, right. So my question should be how to fix it. So, does anyone know how?
Hardware decoding disables by itself when any resources heavier task has started. Software decoding is not faster. Only FF restart can fix it, which is... not good workaround

Post by **LIMPET235** » October 2nd, 2015, 11:31 am

Dun,
Please stay with your original thread.
> viewtopic.php?f=38&t=2964731

It gets confusing trying to keep track of 2.
Thank you.

Automatic inactivate H264 hardware decoding

Automatic inactivate H264 hardware decoding

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