[Bug 50618] New: Slow video playback with 40mbits mpeg2+vdpau

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https://bugs.freedesktop.org/show_bug.cgi?id=50618

             Bug #: 50618
           Summary: Slow video playback with 40mbits mpeg2+vdpau
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@xxxxxxxxxxxxxxxxxxxxx
        ReportedBy: nathanhirschauer@xxxxxxxxxxxxxxx


Created attachment 62425
  --> https://bugs.freedesktop.org/attachment.cgi?id=62425
mediainfo output of the video file

When playing an MPEG2-video with high bitrate (>40 MBps) on my Mobility Radeon
HD 3450 (best graphics card EVER! :3) with VDPAU I get very low framerates when
using hardware video decoding, cpu decoding is fine, here a quick comparison
(no -benchmark results because mplayer did something weird there):

The mediainfo output of the video file is attached to the bug report.

CPU usages with different mplayer parameters:

mplayer without vdpau: MPlayer: 44,7%; Xorg: 12,8% -> Runs fine, 26fps

mplayer -vo vdpau: MPlayer: 43,4%, Xorg: 12,6% -> Runs also file, 26fps

mplayer -vo vdpau:fps=-1 -vc ffmpeg12vdpau: MPlayer: 14%, Xorg: 6,3% (**** Your
system is too SLOW to play this!  ****) -> Too slow! 1-10 fps

You may contact me via IRC (freenode, #radeon -> nathanhi) for the video file.
I'm using mesa from git (git-775ba11), Xorg 1.12.1.902, xf86-video-ati
git-c1b9b2c, libdrm git-481234f and Kernel 3.3.7.

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