[mythtv] [MASSIVE PATCH] BIG DVB PATCH V3.5 Released

Tj htpc at treblid.dyndns.org
Sun Jan 9 20:04:02 EST 2005


Tim Davies wrote:

>Just so you have another point of reference...
>
>I get stuttering on the HDTV video too.  I haven't had any success with AC3
>yet, but I haven't tried very hard.  So my testing is based on Seven HD,
>which has the MPEG stream too.  And yes, it is a lower bitrate than Nine or
>Ten, but they crap out on me at the moment because of the AC3.
>
>  
>
7 is good for testing at least. My receiver loads the Dolby Digital 
Decoder on Sunday when I watched 7HD's loops. Most of the time though, 
Dolby Pro Logic II is used on all AC3 APIDs on every channel. Not sure 
if this's a bug in Myth or the stations just broadcast them in 2 
channels (although there's a Dolby Digital watermark that says surround 
sound).

>It seems to stutter (~50% of the time) if I *change* to an HD channel.  If I
>start on the HD channel, it works fine.  If I record HD and start watching
>the recording straight away, it works fine too.
>
>I thought about pausing the stream for a short while to see if the stutter
>would go away, but that doesn't work.  So what is it about a channel change?
>
>  
>
No ideas on this yet. :( I previously tot my CPU wasn't fast enough (2.6 
o/c'd to 2.8) ..

>I'm having a look at Mark Anderson's patch now to see what makes it tick.
>Should I be able to get this working with software AC3 decoding?
>
>  
>
Yes you should (havn't tested it on Mark's patch though). It's a bit 
crude, on my system, add the line "DEFINES += CONFIG_AC3" in both 
config.h (you can do that automatically by running "configure 
--enable_a52" I think) and in settings.pro. Do a distclean and recompile 
myth.

There's also this option "--enable_a52bin" you can play about with (but 
this doesn't work last time I was on Mandrake 10.1 CE)..

Also in Mythtv settings->general (or something), make sure "AC3 
Passthru" is off.


Regards.



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