Bernhard Froehlich decke at
Wed Mar 24 08:38:19 UTC 2010

On Wed, 24 Mar 2010 01:24:34 -0400, Andriy Bakay <andriy at>
> Hi Bernhard,
> I tried to compile MythTV with VDPAU support and it gave me the 
> following error:
> util-vdpau.cpp: In member function 'void 
> VDPAUContext::PrepareVideo(VideoFrame*, QRect, QRect, QSize, 
> FrameScanType)':
> util-vdpau.cpp:1092: error: call of overloaded 'abs(long long int)' is 
> ambiguous
> /usr/include/stdlib.h:83: note: candidates are: int abs(int)
> /usr/include/c++/4.2/cstdlib:143: note:                 long int 
> std::abs(long int)
> gmake[2]: *** [util-vdpau.o] Error 1
> gmake[2]: Leaving directory 
> `/usr/ports/multimedia/mythtv/work/mythtv-0.22/libs/libmythtv'
> gmake[1]: *** [sub-libmythtv-all] Error 2
> gmake[1]: Leaving directory 
> `/usr/ports/multimedia/mythtv/work/mythtv-0.22/libs'
> gmake: *** [sub-libs-all-ordered] Error 2
> *** Error code 1
> I was able to fix the problem, just replace function 'abs' to 'llabs'. 
> After that fix it compiles and work with my nVidia Silent GeForce 8400 
> GS 512MB. It used only 5-6% of my CPU when I played 1080p movie.

That sounds great but i do not have any nVidia hardware so i cannot test
it myself.
What configure options did you exactly add? From the VDPAU wiki page it
looks like it would be a good idea to add both:
--enable-xvmc-opengl --enable-vdpau

I hope to have some time in the upcoming days to prepare a test port for
this and will reply when i'm ready.

As a side note i've seen that MythTV is already preparing a 0.23 release
so I want to have a 0.23 port ready for a Call for Testers when they
announce their first release candidate.

Bernhard Fröhlich

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