h264 video acceleration in //gpu, but not well

[DocS788]

Hi,

i see in the "browser://gpu" that video h264 is supported by the device:

Encode h264 baseline	0x0 to 1920x1088 pixels, and/or 30.000 fps
Encode h264 main	0x0 to 1920x1088 pixels, and/or 30.000 fps
Encode h264 high	0x0 to 1920x1088 pixels, and/or 30.000 fps

But when i select it in the codec of stadia, the connection suffers a bit. The codec vp9 goes ok, anyhow my (old) gpu can not suppors neither vp9 or h264...i think that all the work is made by cpu/software.

My question is: i have an old PC, why does h264 is less supported then vp9 ?

[ChristopherKlay]

H264 is pretty commonly not well enough supported (i.e. 30fps limitations) while VP9 is optimized enough to work fine on older CPU's by now, but hardware support for GPU's came later on ad most older GPU's don't support decoding it.