<div class="gmail_quote">On Fri, Dec 11, 2009 at 1:03 PM, Taylor Ralph <span dir="ltr"><<a href="mailto:tralph11@yahoo.com">tralph11@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
--- On Fri, 12/11/09, Andrew Gallatin <<a href="mailto:gallatin@cs.duke.edu">gallatin@cs.duke.edu</a>> wrote:<br>
<br>
> From: Andrew Gallatin <<a href="mailto:gallatin@cs.duke.edu">gallatin@cs.duke.edu</a>><br>
> Subject: Re: [mythtv-users] 720p HD content from WPVI in Philly periodic a/v sync issues<br>
> To: "Discussion about mythtv" <<a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a>><br>
> Date: Friday, December 11, 2009, 10:54 AM<br>
<div><div></div><div class="h5">> Byron Poland [<a href="mailto:wpoland@gmail.com">wpoland@gmail.com</a>]<br>
> wrote:<br>
> > for the past couple of months anything I record from<br>
> WPVI in Philadelphia<br>
> > (delivered via clear qam from Verizon FIOS in<br>
> Wilmington, DE), has had<br>
> > playback problems where the video and audio fall out<br>
> of sync, and myth then<br>
> > speeds up the video and/or drops frames for a second<br>
> or 2 to catch up. I've<br>
> > read the list and seen other threads describing a<br>
> similar phenomenon,<br>
> > including being isolated to one channel. All<br>
> other 720p and 1080 recordings<br>
><br>
> <..><br>
><br>
> I think this is the same problem as reported here, nearly<br>
> 2 years ago:<br>
> <a href="http://www.gossamer-threads.com/lists/mythtv/dev/317736" target="_blank">http://www.gossamer-threads.com/lists/mythtv/dev/317736</a><br>
><br>
> As DanielK said "they are just using an encoding extension<br>
> we don't<br>
> support very well.....I believe they are broadcasting about<br>
> 40 fps on<br>
> a 60fps stream and marking some of the frames as<br>
> repeatable"<br>
> If this is true, you may have luck complaining to the<br>
> broadcaster like<br>
> the people in that thread did. Unfortunately, that's<br>
> not much of an<br>
> option for me, as multiple broadcasters in my market have<br>
> their<br>
> encoders setup this way. The only way I was able to<br>
> play back these<br>
> sorts of streams was by using a non-MythTV front end (sigma<br>
> based<br>
> SageTV HD100).<br>
><br>
> I'd love to come back to MythTV, and I'm eagerly looking<br>
> forward to a<br>
> fix to this. I have a mythbox setup running trunk,<br>
> and I'm happy to<br>
> test patches, make snippets of these streams available to<br>
> the devs,<br>
> etc.<br>
><br>
> Drew<br>
<br>
</div></div>I've got a couple patches attached that might help. They are both based on 0.22-fixes but the latest av-sync changes to trunk will probably break the repeat_pict patch. Let us know if these help at all.<br>
<br>
Also, if you provide samples then I'll have a look.<br>
<br>
--<br>
<font color="#888888">Taylor<br>
</font><br></blockquote><div><br>I don't know if I will get a chance to build with the patches for a few days. I'll try and get a snippet of a sample file out at in the next day or so though Thanks!<br> </div></div>