> hwdec=auto takes care of it, and for me, it does show a significant
> difference in CPU use while using it. `vainfo`, part of libva-utils
> port, shows the supported codec. As long what you're reproducing is
> supported by your GPU, you should see some difference.
> I don't really recall the situation for browsers.
When playing a supported codec wit mpv,
it will explicitly say 'using hw decoding'.
Is there a way to tell explicitly whether e.g. firefox
is using libva when playing a video (as opposed to an observed
cpu drop, which might be due to other stuff)?
BTW the drop in eletrictity consumption (between mpv playing
a video with and without hw accell) is quite negligible. But
that's to be expected I suppose: the GPU does the decoding
more efficiently, but the video still needs to get decoded.
Jan
