On Jan 11 16:12:16, h...@stare.cz wrote:
> > Yes, chromium has h264 enabled by default, (our) firefox does not.
> > Toggle the mentioned about:config key on, and webex will work.
> > Here is a h264 support test page:
> > https://mozilla.github.io/webrtc-landing/pc_test_no_h264.html
>
> Setting media.webrtc.hw.h264.enabled to true
> makes the above page report YES.
>
> But what does it actualy do? FF plays e.g.
> https://www.youtube.com/watch?v=u5ph_r3btss
> both with that setting "true" and "false"
>
> Also, why would you disable (or enable, for that matter)
> one specific video format?
>
> "Play the video on this page"
> "No I won't: it's H264"
>
> > We spend quite some time to get the openh264 plugin to run when
> > Johannes figured out that it's not needed and toggling
> > "media.webrtc.hw.h264.enabled" to "true" is sufficient.
>
> Setting it to false is also sufficient, apparently.
>
> > (Can someone test if media.webrtc.hw.h264.enabled works on a system
> > without libva / hardware h264 decoding support?)
>
> vainfo: VA-API version: 1.22 (libva 2.22.0)
> vainfo: Driver version: Intel i965 driver for Intel(R) Sandybridge Desktop -
> 2.4.1
> vainfo: Supported profile and entrypoints
> VAProfileMPEG2Simple : VAEntrypointVLD
> VAProfileMPEG2Main : VAEntrypointVLD
> VAProfileH264ConstrainedBaseline: VAEntrypointVLD
> VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
> VAProfileH264Main : VAEntrypointVLD
> VAProfileH264Main : VAEntrypointEncSlice
> VAProfileH264High : VAEntrypointVLD
> VAProfileH264High : VAEntrypointEncSlice
> VAProfileH264StereoHigh : VAEntrypointVLD
> VAProfileVC1Simple : VAEntrypointVLD
> VAProfileVC1Main : VAEntrypointVLD
> VAProfileVC1Advanced : VAEntrypointVLD
> VAProfileNone : VAEntrypointVideoProc
>
>
> How do you tell if FF offloads the decoding
> to the H264-capable HW?
>
> Jan
>
