[mythtv] RE:DVB Audio Sync Issues

[Ian J. White]

MessageIan J. White wrote: 

>What code are you using, CVS or one of my versions? 
 
I'm currently using the CVS version. Your patch to the DVB code seemed
to break the DVB-T support. I didn't delve too much into it as I was
trying to fix the sync problems. When I have time later this week then I
shall see where the problems are and report back.

>I guess that the audio sync code in mplayer is better than that 
>of MythTV. 

>Feel free to try to fix that, I own a nVidia graphics adapter myself, 
>and so I use the Experimental A/V sync code mentioned earlier, 
>which works perfectly in my case..
 
Yeah player seems to be much better. I have time I will look...
 
 
>> I've traced where the "ac-tex damaged at 10 17" errors are from 
>> by grepping the myth source and it seems to be in: 
>
>They indicate a very messed up mpeg2 stream. 
>
>Which I usually get in extreme weather conditions (when my signal 
>goes way down). 
>
>Do you get this constantly when watching those two channels? 
>Or is it more like now and then? 
>
>I would suggest checking out what Edward mentioned in a reply to 
>your post (linuxtv.org mailinglist). 
 
It only happens on channels with QAM16 and FEC 3/4 channels, the rest
seem to be fine. I get no picture break up and no artifacts. The stream
is fine apart from these errors. I get between 1 and 20 errors in 30
minutes of watching live tv. 
 
I noticed that there's a new version of FFMPEG as of the 25th August
which purports to have full a/v sync fixes - not sure if it'll help. I
'm going to have a go at upgrading libavcodec and see if that helps
(since that is the source of the ac-tex errors).
 
Ian
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