Mplayer failure message

[jd1008]

$ mplayer "Fiona e Lisa - Pastyme with good company-aqYyOAzKOzw.webm"
MPlayer SVN-r37150-4.8.3 (C) 2000-2014 MPlayer Team
....
Playing Fiona e Lisa - Pastyme with good company-aqYyOAzKOzw.webm.
libavformat version 55.19.104 (external)
libavformat file format detected.
[lavf] stream 0: video (vp8), -vid 0
[lavf] stream 1: audio (vorbis), -aid 0
VIDEO:  [VP80]  480x360  0bpp  25.000 fps    0.0 kbps ( 0.0 kbyte/s)
Load subtitles in ./
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 55.39.101 (external)
Selected video codec: [ffvp8] vfm: ffmpeg (FFmpeg VP8)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 2 ch, floatle, 0.0 kbit/0.00% (ratio: 0->352800)
Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis)
==========================================================================
AO: [pulse] 44100Hz 2ch s16le (2 bytes per sample)
Starting playback...
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [vdpau] 480x360 => 480x360 Planar YV12
A:   0.3 V:   0.0 A-V:  0.224 ct:  0.004   0/  0 ??% ??% ??,?% 1 0
[VD_FFMPEG] DRI failure.
A: 134.6 V: 135.0 A-V: -0.380 ct:  0.010   0/  0  3%  1%  1.1% 0 0

So, what's causing VD_FFMPEG failure?

The video/audio plays just fine.

Just curious about  the failure message.