[mythtv-users] libXvMCNVIDIA for HD Playback

Scooty scott at web-ster.com
Sat Apr 4 16:29:48 UTC 2009


Nick Rout wrote:
> On Sat, Apr 4, 2009 at 1:39 PM, Nick Rout <nick.rout at gmail.com> wrote:
>   
>> On Sat, Apr 4, 2009 at 12:52 PM, Scott <scott at web-ster.com> wrote:
>>     
>>> Nick Rout wrote:
>>>
>>> On Sat, Apr 4, 2009 at 9:41 AM, Scott <scott at web-ster.com> wrote:
>>>
>>>
>>> Thanks for the reply. I did run the frontend in a terminal and it did throw
>>> h264 warnings about the frame size and saying that it's throwing frames out.
>>>
>>>
>>> AFAIK Xvmc will not help with h264 encoded material.
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>>>
>>>
>>> Thanks Nick, I was kind of wondering that myself. Below is some of what I
>>> see in my log (i'm sifting through it off and on today). There's usually a
>>> few lines of these errors off and on, there's definitely large blocks on the
>>> last error that seem to continue throughout playing the file.
>>>
>>> [h264 @ 0x138db00]decode_slice_header error
>>> [h264 @ 0xb9bb00]mmco: unref short failure
>>> [h264 @ 0xb9bb00]number of reference frames exceeds max (probably corrupt
>>> input), discarding one
>>>
>>> I don't believe that the issue is corrupt data because I can play the HD
>>> files just fine in other players (Xine and Mplayer specifically, I need to
>>> try VLC yet). Has anyone ran into these errors before and more importantly
>>> is there a fix?
>>>
>>>       
>> Looks similar to errors you get with broadcast h264, some of those
>> streams are not handled yet by myth-0.21 because ffmpeg (which myth
>> uses an internal version of) has only recently started working with
>> this stuff.
>>
>> you could try paul kendall's ppa repo [1], which has a patched version
>> of mythtv which will handle many of these errors. jean-yves avenard's
>> patched mythtv-0.21 also handles these streams, but you won't need his
>> version unless you have a vdpau capable card, which you haven't.
>>
>> [1] https://launchpad.net/~paul-kcbbs/+archive/ppa
>>
>> PS just realised pointing you to these repos is assuming you are using
>> mythbuntu, dunno whether there are equivalents for other distros.
>>
>>     
>
> PPS HD h264 is very processor intensive to decode. What cpu do you
> have? Have you considered getting a vdpau capable video card?
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I have a AMD 64 X2 5400+ (64 bit 2.8 Ghz Dual Core). I can get a vdpau card, I have a slot available in the machine even, it was just nice having it all in one. If it is the card then why can I play h264 stuff in other players? It is because they don't use ffmpeg for the decoding then? I also play h265 stuff through mythvideo which of course actually hands the playback off to Xine. I'm just curious on that one, if there's any more insight there :-) I will start looking for another card. Are there any recommendations for an Nvidia card with HDMI out that does vdpau?

Thanks Again,

Scott S.

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