[mythtv] [PATCH] XVideo XvMC VLD broken

[Terry Barnaby]

Terry Barnaby wrote:
> Daniel Kristjansson wrote:
> 
>> On Mon, 2005-05-02 at 20:31 +0100, Terry Barnaby wrote:
>>
>>> Daniel Kristjansson wrote:
>>> Thanks for adding the patch.
>>> I agree there should not be an exit there, but there does not seem
>>> to be a way of returning an error from this. I must admit, with my
>>> searching through the libavformat and libavcodec code fro the problem 
>>> there is some room for improvement !
>>
>>
>> Yep, though it is best to send fixes directly to ffmpeg, to keep
>> syncing simpler. We've synced bugs back into the code from ffmpeg
>> before.
>>
>>
>>> Now I have got the channel changing working better, (although not
>>> ideal as there should be no need to close down and re-create Codecs,
>>> (this could be done in mpegts) ...), I would like to get the
>>> new merged Xv/XvMC code working with XvMC VLD.
>>> Is it worth me having a look at this now, or shall I hang fire untill
>>> you have completed the change to the Xv/XvMC init ?
>>
>>
>> Now is a good time, I'm holding back on Xv/XvMC changes this week
>> to allow Andy Poling a chance to get his chromakey OSD patch ready
>> for CVS.
>>
>> -- Daniel
>>
>>
>>
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>>
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> 
> 
> Ok, any pointer to get going ?
> I have just re-compiled from CVS.
> With XvMC VLD (bob deinterlace enabled or disabled) I get very
> garbaled sound, Screen display is stuterry with frequent MPEG
> blocking atifacts. CPU usage is about 14%, which is low
> (normally about 18%).
> Mythfront end gives the following error messages:
> 
> 2005-05-02 21:13:24.504 AddInheritence(A       ) Error, future=frame
> 2005-05-02 21:13:24.747 AddInheritence( B      ) Error, future=frame
> 2005-05-02 21:13:24.984 AddInheritence(  C     ) Error, future=frame
> 2005-05-02 21:13:25.463 AddInheritence(   D    ) Error, future=frame
> 2005-05-02 21:13:25.704 AddInheritence(    E   ) Error, future=frame
> 2005-05-02 21:13:25.944 AddInheritence(     F  ) Error, future=frame
> 2005-05-02 21:13:26.429 AddInheritence(A       ) Error, future=frame
> 2005-05-02 21:13:26.661 AddInheritence( B      ) Error, future=frame
> 2005-05-02 21:13:26.904 AddInheritence(  C     ) Error, future=frame
> 2005-05-02 21:13:27.384 AddInheritence(   D    ) Error, future=frame
> 2005-05-02 21:13:27.623 AddInheritence(    E   ) Error, future=frame
> 2005-05-02 21:13:27.864 AddInheritence(     F  ) Error, future=frame
> 
> When set to use Xv display and sound is fine although CPU usage
> is greater than MythTv CVS 2005-04-22 80% versis 70%.
> 
> Cheers
> 
> 
> Terry
> 
> 
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> 
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Hi Daniel,

Another point of information on this:
I can get rid of the "AddInheritence" error messages by removing
line 77 in xvmcvldvideo.c
"render->p_future_surface = render->p_surface;"
This line may be incorrect ...

This does not affect things much. With some debug turned on I get
the following info, it appears that the video is going at half
frame rate ???

2005-05-03 07:23:09.039 A/V diverged by 6.41477 frames, extending frame 
to keep
audio in sync
2005-05-03 07:23:09.119 A/V diverged by 6.44233 frames, extending frame 
to keep
audio in sync
2005-05-03 07:23:09.199 A/V diverged by 6.57548 frames, extending frame 
to keep
audio in sync
2005-05-03 07:23:09.208 positionMap[ 42 ] == 10243932.
2005-05-03 07:23:09.279 A/V diverged by 6.6566 frames, extending frame 
to keep a
udio in sync
2005-05-03 07:23:09.359 A/V diverged by 6.5362 frames, extending frame 
to keep a
udio in sync
'video_output' mean = '79991.91', std. dev. = '565.37', fps = '12.50'

Terry