[mythtv] Automatic zoom to remove black borders for dvb

[Neale Swinnerton]

Ian Caulfield wrote:
> On Sun, 2 Oct 2005, Torbjörn Jansson wrote:
> 
>>> Or is there meta data in the
>>> broadcast signal which provides the necessary information?
>>>
>>
>> WSS or whatever it's called tells what aspect it is in, but i asume 
>> that WSS
>> is not accurate and/or not being transmitted otherwise there wouldn't 
>> be a
>> problem
> 
> 
> For DVB it's called AFD (WSS is the analogue version). Myth currently 
> doesn't use the AFD info (although auto aspect switching is broken 
> anyway). Someone did post a patch at one point...

I think you're refering to a patch I posted. libavformat parses the AFD 
descriptor, but there's either a bug in there or in the mythtv code 
(which I couldn't find) or the networks don't broadcast the AFD 
properly. Sometimes it would miss changes completely. In the end I gave 
up on it. I find 'Fill' good enough for 95% of the stuff I watch. Shame 
really, checking for AFD changes would be a good 'extra' marker for 
Commercial flagging, which never works well enough for me here in the UK.

If someone who understands the code better than me has a look at this, 
I'd be very happy to act as guinea pig.....

also, I thought WSS signalled the TV to change aspect ratio, rather than 
signalled changes to the recorder?

Neale


> 
> Ian
> 
> 
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