Ubuntu has issued an advisory for this on September 3:
http://www.ubuntu.com/usn/usn-2729-1/

mga5 x86_64 NVIDIA GF104 [GeForce GTX 460]

Installed packages :
lib64vdpau-devel-1.1.1-1.mga5
lib64vdpau1-1.1.1-1.mga5

Running : mplayer -vo vdpau test.mkv
VO: [vdpau] 1920x1080 => 1920x1080 Planar YV12  [zoom]

Display and cpu usage OK.

Update OK.

CC: (none) => yann.cantin
Whiteboard: MGA4TOO => MGA4TOO MGA5-64-OK

mga4 i586 virtualbox (GeForce GTX 770)

[lcl@alcor ~]$ mplayer -vo vdpau test2.mkv
MPlayer SVN-3.r36361.3.mga4.tainted-4.8.2 (C) 2000-2013 MPlayer Team
Playing test2.mkv.
libavformat version 55.12.100 (external)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0
VIDEO:  [H264]  1024x576  0bpp  24.000 fps    0.0 kbps ( 0.0 kbyte/s)
Clip info:
 creation_time: 2011-06-02 12:45:20
 TITLE: Elephant Dream - test 2
 DATE_RELEASED: 2010
 COMMENT: Matroska Validation File 2, 100,000 timecode scale, odd aspect ratio, and CRC-32. Codecs are AVC and AAC
Load subtitles in ./
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1

[lcl@alcor ~]$ locate vdpau
/usr/lib/libvdpau.so.1
/usr/lib/libvdpau.so.1.0.0
/usr/lib/vdpau
/usr/lib/directfb-1.7-0/gfxdrivers/libdirectfb_vdpau.so
/usr/lib/directfb-1.7-0/systems/libdirectfb_x11vdpau.so
/usr/lib/gstreamer-1.0/libgstvdpau.so
/usr/lib/vlc/plugins/codec/libvdpau_plugin.so

Played the test file in vlc to confirm that it was valid:
Elephant Dream - test 2
Video:
codec H264 - MPEG-4 AVC (part 10) (avc1)
resolution 1024x576
frame rate 24.0...
decoded format: Planar 4:2:0 YUV

[lcl@alcor ~]$ sudo urpmi libvdpau_nvidia
No package named libvdpau_nvidia

Is this a problem with nvidia proprietary driver and 32-bit architecture?
It certainly plays fine in x86_64 on the host system, mga5 pre-update.

CC: (none) => tarazed25

Testing in virtualbox mga4 x86_64

mplayer cannot find the vdpau nvidia backend pre-update.
After the update the same applies and it is not in the /usr/lib64/vdpau directory either.  So maybe it has something to do with virtualbox?

(In reply to Len Lawrence from comment #3)
> Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object
> file: No such file or directory

That file is probably in the proprietary nvidia module package (in nonfree).  I read something that said only the proprietary nvidia module actually truly makes use of vdpau on Linux.

That seems likely.  Is it possible to install a nonfree version for virtualbox?  I cannot even find nvidia-settings in this vbox so presumably that is part of the package.

Anyway, not to worry; I discovered that one of my test machines has mga4 x86_64 installed.  Testing on that and all is well.

mga4 x86_64 real hardware - GeForce 310
nvidia 331.113
With the update installed mplayer had no problem with the Matroska test file and posted the same information as referenced in comment 3.
And I noted that here are several locations for the vdpau backend.

Sorry, getting all muddled here.  Forget comment 3.  This is the information that was returned.

[lcl@altair ~]$ mplayer -vo vdpau test2.mkv
MPlayer SVN-3.r36361.3.mga4-4.8.2 (C) 2000-2013 MPlayer Team
Playing test2.mkv.
libavformat version 55.12.100 (external)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0
VIDEO:  [H264]  1024x576  0bpp  24.000 fps    0.0 kbps ( 0.0 kbyte/s)
Clip info:
 creation_time: 2011-06-02 12:45:20
 TITLE: Elephant Dream - test 2
 DATE_RELEASED: 2010
 COMMENT: Matroska Validation File 2, 100,000 timecode scale, odd aspect ratio, and CRC-32. Codecs are AVC and AAC

This is one which can't be tested inside virtualbox.

Validating. Advisory uploaded.

Please push to 4 & 5 updates

Thanks

Keywords: (none) => validated_update
Whiteboard: MGA4TOO MGA5-64-OK MGA4-64-OK has_procedure => MGA4TOO has_procedure advisory MGA5-64-OK MGA4-64-OK
CC: (none) => sysadmin-bugs

An update for this issue has been pushed to Mageia Updates repository.

http://advisories.mageia.org/MGASA-2015-0364.html

Status: NEW => RESOLVED
Resolution: (none) => FIXED