[mythtv] [PATCH] Specify aspect ratio cycle

[Jon Burgess]

Kristof Pelckmans wrote:

>I prefer to let the user decide : there are always exotic formats that you
>cannot detect.
>  
>
Yes are correct, but there is some info transmitted in the MPEG stream 
of the UK DVB broadcasts that can help determine the correct mode.

The AFD field contains further information describing the transmission 
format, for example one of the codes indicates "4:3 picture transmitted 
in 16:9 frame with black borders". This kind of information could be 
used to switch to a zoom mode that cuts off the black borders on the 
left and right automatically.

I implemented supported for this flag in VDR when used with the DXR3 
driver. See this post for some more details.

http://sourceforge.net/mailarchive/message.php?msg_id=7689382

The code above does not implement a user override feature but it could 
be added fairly easily. I find that the zoom modes that get 
automatically selected are right for me almost all the time.

    Jon