[mythtv] DVD playback issues, patch

[Johnny Stenback]

Davin McCall wrote:
> Hi,
>
> What do you mean by "off by 2x" ... 2x what? Do you mean video is
> playing twice as fast as audio (or the other way around)?
> Or, does video lag audio by a consistent amount (2 frames, 2 seconds?)
> or the other way around?

Sorry for not clarifying that, what I see is that the video playback 
speed is ~2x of the audio speed. Audio plays at normal speed as far as I 
can tell, but video is ~2x too fast.

> Thanks,
>
> Davin
>
>
> On 15/11/09 04:36, Johnny Stenback wrote:
>> Hello David,
>>
>> Thanks for digging in here. I haven't been able to test your patch on
>> my primary system where I use VDPAU for playback yet, but I did test
>> using software decoding and software rendering and it does not seem
>> like your patch fixes the problem I'm seeing, and in a way it seems to
>> make it worse :(
>>
>> Without your patch, if I fast forward for just a second after starting
>> DVD playback, the audio/video speeds sync up and remains in sync from
>> then on, but with your patch I can't seem to get audio and video to
>> ever be in sync, it's always off by what looks like ~2x.
>>
>> I wish I could help more here, but I don't know this code at all and
>> I'm unable to spend any serious time on this in the foreseeable future.
>>
>> Davin McCall wrote:
>>> Here's an updated patch. The main change is that it avoids advancing the
>>> vsync trigger if a frame is dropped. Otherwise, WaitForFrame will
>>> effectively wait for the frame anyway, so dropping it has no effect.
>>> This caused problems on some media files I have.
>>>
>>> Davin.
>>>
>>>
>>> On 13/11/09 23:35, Davin McCall wrote:
>>>> Hi all,
>>>>
>>>> Regarding the DVD playback issues I mentioned earlier. This is
>>>> (possibly) related to the following tickets:
>>>> http://svn.mythtv.org/trac/ticket/7067
>>>> http://svn.mythtv.org/trac/ticket/7349
>>>>
>>>
>>>
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