high cpu load while watching html5 video in firefox

[Ivan Klymenko]

On Sat, 12 Sep 2015 16:34:51 +0300
алексей важный <vajniy.alexei at yandex.ru> wrote:

> Hello,
> I am getting 70-80% cpu load when playing any youtube video. But when
> i download mp4 file manually and watch it with gst-play-1.0
> everything is alright and cpu load is around 3-5%. In both cases i
> can see that output in console: libva info: VA-API version 0.38.0
> libva info: va_getDriverName() returns 0 libva info: Trying to
> open /usr/local/lib/va/i965_drv_video.so libva info: Found init
> function __vaDriverInit_0_38 libva info: va_openDriver() returns 0
> 
> Versions of packages installed:
> firefox-esr-38.2.1 gstreamer1-1.4.5_1 gstreamer1-libav-1.4.5
> gstreamer1-plugins-1.4.5_2 gstreamer1-plugins-all-1.4_1
> gstreamer1-plugins-bad-1.4.5_1 gstreamer1-plugins-faad-1.4.5
> gstreamer1-plugins-good-1.4.5 gstreamer1-plugins-mpeg2dec-1.4.5
> gstreamer1-plugins-mpeg2enc-1.4.5 gstreamer1-plugins-opus-1.4.5
> gstreamer1-plugins-ugly-1.4.5 gstreamer1-plugins-vpx-1.4.5_1
> gstreamer1-plugins-x264-1.4.5_1 gstreamer1-vaapi-0.5.10_1
> 
> May be i am doing something wrong? It's the same with the clear
> firefox profile. _______________________________________________
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I have exactly the same problem

firefox-40.0.3,1
gstreamer-0.10.36_4
gstreamer-ffmpeg-0.10.13_4
gstreamer1-1.4.5_1
gstreamer1-libav-1.4.5  
gstreamer-plugins-XXX

vainfo 
libva info: VA-API version 0.38.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/local/lib/va/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_38
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.38 (libva 1.6.1)
vainfo: Driver version: Intel i965 driver for Intel(R) Sandybridge
Mobile - 1.6.1 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