[mythtv-users] VDPAU on older pre-G98 8400 GS

Eric Sharkey eric at lisaneric.org
Wed Jan 6 01:06:00 UTC 2010


On Tue, Jan 5, 2010 at 3:10 PM, Ben Dailey <ben at inspiredtechs.com> wrote:
> I maybe very wrong here but from my reading of the following log output
> mplayer is failing on VDPAU output and falling back to ffmpeg libavcodec
> implementation for  playback and not using vdpau.

Ok, you're right.  Here it is again after adding both -vc
ffmpeg12vdpau and -ac hwac3:

MPlayer SVN-r30075 (C) 2000-2009 MPlayer Team
Can't open joystick device /dev/input/js0: No such file or directory
Can't init input joystick

Playing 4134_20091226080000.mpg.
TS file format detected.
VIDEO MPEG2(pid=2752) AUDIO A52(pid=2753) NO SUBS (yet)!  PROGRAM N. 1
VIDEO:  MPEG2  704x480  (aspect 2)  29.970 fps  15000.0 kbps (1875.0 kbyte/s)
==========================================================================
Forced video codec: ffmpeg12vdpau
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Unsupported PixelFormat -1
Selected video codec: [ffmpeg12vdpau] vfm: ffmpeg (FFmpeg MPEG-1/2 (VDPAU))
==========================================================================
==========================================================================
Forced audio codec: hwac3
Opening audio decoder: [hwac3] AC3/DTS pass-through S/PDIF
No accelerated IMDCT transform found
hwac3: switched to AC3, 192000 bps, 48000 Hz
AUDIO: 48000 Hz, 2 ch, ac3, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [hwac3] afm: hwac3 (AC3 through S/PDIF)
==========================================================================
AO: [alsa] 48000Hz 2ch ac3 (1 bytes per sample)
Starting playback...
[VD_FFMPEG] XVMC-accelerated MPEG-2.
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [vdpau] 704x480 => 704x528 MPEG2 VDPAU acceleration  [fs]
demux_mpg: 30000/1001fps NTSC content detected, switching framerate.
demux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate.
demux_mpg: 30000/1001fps NTSC content detected, switching framerate.
demux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate.
...


I changed the audio codec only to make a more apples to apples
comparison with mythTV.  It doesn't really make any audible
difference.

Again mplayer is completely smooth and mythTV is still quite choppy.

For reference, from the X server log:

(II) Module nvidia: vendor="NVIDIA Corporation"
        compiled for 4.0.2, module version = 1.0.0
        Module class: X.Org Video Driver
(II) NVIDIA dlloader X Driver  190.42  Tue Oct 20 20:26:00 PDT 2009
(II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[..]
(II) Jan 04 09:35:34 NVIDIA(0): NVIDIA GPU GeForce 8400 GS (G86) at
PCI:1:0:0 (GPU-0)
(--) Jan 04 09:35:34 NVIDIA(0): Memory: 524288 kBytes
(--) Jan 04 09:35:34 NVIDIA(0): VideoBIOS: 60.86.4a.00.22
(II) Jan 04 09:35:34 NVIDIA(0): Detected PCI Express Link width: 4X

Eric


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