[mythtv] help: segmentation fault with DVB-T

Matthew Carnevale mcarnevale at ozforces.com.au
Wed Nov 5 05:22:13 EST 2003

Turns out it was the font files after all.  Those two .ttf files that go 
into /usr/share/myth were corrupt.  Unfortunately my Linux box isn't on 
the 'net, so I have to do all my checkouts / updates from my Windows 
machine, which insists on treating all files as textfiles on the initial 
checkout and converts them to DOS style CR-LF.  I'd written a script 
that converts all the filesi n the tree back to Unix friendly versions 
but it was processing files it shouldn't have. 

Now Myth is working great, I have all the DVB-T channels working, seems 
to have some synchronisation problems (the video plays too slow but the 
audio runs at full speed) on some channels (those wihere the backend 
reports a video bitrate of 10Mbps or above), even though top shows it is 
only using around 25% CPU.  Tried the 'Experimental A/V Code', 'Jitter 
Reduction' and 'Extra Audio Buffering' settings in different 
combinations with varying success. 

One suggestion (unfortunately I don't have the expertise yet to 
contribute this one myself) would be auto pan&scan detection.  Stations 
in my area broadcast in 16:9 aspect all the time and just put black 
borders around the 4:3 content, while some widescreen stuff isn't 
'quite' widescreen so needs to be zoomed.  Maybe mythtv could detect 
these black borders and switch modes automatically.... would be useful 
on normal 4:3 TVs. 



Kenneth Aafl°y wrote:

>On Tue, 2003-11-04 at 05:15, Matthew Carnevale wrote:
>>Thanks for that.  I've added the proper PID for the audio channel to the 
>>database.  Still crashes though, but I'm not sure if it has anything to 
>>do with the DVB in particular now - I've tried playing some of my older 
>>stored recordings and the frontend crashes on those too.  It plays them 
>>fine in the small preview window but when you press ENTER to start 
>>playing the recording fullscreen, it dies.  Looks like I'll need to do 
>>some more digging. 
>Could you try fixing those font messages, if that won't work get a
>backtrace as per: http://mythtv.org/docs/mythtv-HOWTO-20.html#ss20.8
>mythtv-dev mailing list
>mythtv-dev at mythtv.org

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