[mythtv] Problem with Via VLD XVMC display and DVB recordings
in current CVS: Gaps in video and audio
Terry Barnaby
terry1 at beam.ltd.uk
Sat Apr 9 19:16:53 UTC 2005
Jesper Sörensen wrote:
> Terry Barnaby wrote:
>
>> Jesper Sörensen wrote:
>>
>>> Terry Barnaby wrote:
>>>
>>>> Could some change to the DVB code have resulted in an MPEG stream
>>>> that the Via MPEG hardware cannot decode correctly ?
>>>
>>>
>>>
>>> The only thing I can think of is if your hw decoder has problems with
>>> multiple parallell streams? In that case the decoder is supposed to
>>> pick one stream but I don't know how XvMC works. Could you please
>>> post the autopid log msgs from a few recordings so I can see
>>> which/how many pids it's recording?
>>>
>>
>> Here is the log output from mythbackend when watching a channel with
>> the gaps and jumps in it.
>> There appear to be two Audio PID's being selected .....
>
>
>
> Yes, and it seems to be a XVMC problem since you said it works with XV
> and software decode?
>
> The bug was previously hidden because the recorder was "limited", but
> that's not a long term solution. If you haven't already done so, please
> try and get some logs and more info on what's wrong with XvMC and open a
> bug for it.
>
> For a quick workaround, you can try activating "hw decoder" for your DVB
> card. As a side effect (besides using different demux settings) that
> should limit your recordings to just one audio stream again...
>
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I guess this could be a problem in libavcodec, rather than XvMC. I
presume this code should just send the video stream to the HW MPEG
decoder. Maybe it is striping off the first audio stream for sound
and sending the Video + Audio to the hardware decoder. This would
probably break a HW video decoder ....
I wonder if any other HW MPEG decoders are having the same problem ?
Terry
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