Hi. I'm having trouble with aceleration, with 720 and 1080 videos.
This has been happening with every catalyst version I tested so far (everyone since february).
To start mplayer I'm using "mplayer -vo vaapi:gl -va vaapi"
Here a screenshot:

My system:
Arch x86_64
Catalyst 10.11
mplayer-vaapi 32669
xvba-video 0.7.6
Here's log from mplayer,
Code:
Warning unknown option device at line 5
MPlayer SVN-r32669-4.5.1 (C) 2000-2010 MPlayer Team
161 audio & 345 video codecs
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing series/the walking dead/The.Walking.Dead.S01E01.Days.Gone.Bye.720p.HDTV.x264-CTU.mkv.
libavformat file format detected.
[matroska,webm @ 0x2dd0570] Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: audio (ac3), -aid 0
[lavf] stream 1: video (h264), -vid 0
VIDEO: [H264] 1280x720 0bpp 24.000 fps 0.0 kbps ( 0.0 kbyte/s)
SUB: Added subtitle file (1): series/the walking dead/The.Walking.Dead.S01E01.Days.Gone.Bye.720p.HDTV.x264-CTU.srt
[vo_vaapi] Using OpenGL rendering
libva: libva version 0.31.1
Xlib: extension "XFree86-DRI" missing on display ":0.0".
libva: va_getDriverName() returns 0
libva: Trying to open /usr/lib/dri/fglrx_drv_video.so
libva: va_openDriver() returns 0
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
[VD_FFMPEG] VA API accelerated codec.
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
==========================================================================
AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
Unsupported PixelFormat 61
[VD_FFMPEG] Trying pixfmt=1.
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [vaapi] 1280x720 => 1280x720 H.264 VA-API Acceleration
[VD_FFMPEG] XVMC-accelerated MPEG-2.
vainfo
Code:
libva: libva version 0.31.1
Xlib: extension "XFree86-DRI" missing on display ":0.0".
libva: va_getDriverName() returns 0
libva: Trying to open /usr/lib/dri/fglrx_drv_video.so
libva: va_openDriver() returns 0
vainfo: VA API version: 0.31
vainfo: Driver version: Splitted-Desktop Systems XvBA backend for VA-API - 0.7.6
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointIDCT
VAProfileMPEG2Main : VAEntrypointIDCT
VAProfileH264High : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
I also tried with a VC-1 video, but the output is as corrupted as with x264.
Any ideas? Thanks in advance