As you can read: avcodec decoder warning: threaded frame decoding is not compatible with avcodec-hw, disabledĪlso: avcodec decoder debug: using slice thread mode with 4 threads It has always been the case when decoding a 4k file. Also, note that VLC never returns and I have to kill -9 it. VLC is still choppy though it now finds va_openDriver and doesn't report an error like in my edit #1. I have just installed i965-va-driver, vdpau-va-driver, libvdpau-va-gl1 on my Ubuntu 14.04. I tried the acceleration in vlc (automatic mode for acceleration) but it's still choppy: Mplayer seems to use 3 CPU as I'm at 75% in CPU monitor. Model name : Intel(R) Core(TM) i7-3537U CPU 2.00GHz ![]() Ii libvamp-hostsdk3:amd64 2.5+repack0-2 amd64 helper library for Vamp hosts written in C++Ġ0:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) Ii libva1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - runtime Ii libva-x11-1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - X11 runtime Ii libva-wayland1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - Wayland runtime Ii libva-tpi1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - TPI runtime ![]() Ii libva-glx1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - GLX runtime Ii libva-egl1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - EGL runtime Ii libva-drm1:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - DRM runtime Ii libva-dev:amd64 1.3.0-2 amd64 Video Acceleration (VA) API for Linux - development files ![]() My laptop is not super recent but it's still a powerful 2.5GHz i7 Samsung device. The video is perfectly smooth on mplayer which seems to use more than one CPU. It's totally choppy on VLC (2.1.6 Rincewind) which seems to use only one CPU. I'm trying to run a 4k h264 MPEG4-AVC part 10, 4k 3840x2160 video.
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