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Old 05-02-09, 07:36 PM   #1
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Join Date: Jan 2009
Posts: 5
Default VDPAU slower than software-only?

Hi folks,

I'm trying to play back a few different h264 files with VDPAU, and I'm seeing considerably worse performance when VDPAU is enabled - lower CPU usage but many more frames being dropped.

My system:
8800m GTX w/512Mb (180.51 driver)
Core 2 Duo T8300 (2 x 2.4GHz)
Intel HDA Audio
Fedora Core 10 32-bit
mplayer-svn (checked out today).
All files are on the local hard drive.

I've tried a few different files at 720p and 1080p, running them as either:
./mplayer -vo vdpau -vc ffh264vdpau FILE
./mplayer FILE

720p files with VDPAU give me the mplayer performance warning, the same file without VDPAU plays back fine with far fewer visible dropped frames. 1080p gives me the performance warning on both, but again enabling VDPAU causes far more frames to be dropped on playback. In both cases I see about 1-10% CPU usage with VDPAU enabled, 80-90% without it.

I've disabled PulseAudio (it was sitting at about 15% CPU) which made no difference, I'm somewhat at a loss what to try next. Any ideas?
ChrisP is offline   Reply With Quote