[mythtv] Ticket #4872: Detect if video is letterboxed and switch to corect fill mode

[Mark Buechler]

Hi

On Mon, Mar 10, 2008 at 5:06 AM, Mårten Bohlin <mabo at mochc.net> wrote:

> On Sun, Mar 9, 2008 at 12:32 PM,  <mythtv at longhome.co.uk> wrote:
> > I've noticed that 2.39:1 letterboxed in a 16:9 stream also gets zoomed,
> >  meaning part of the broadcast picture is lost. I would have thought
> that
> >  only content in a 4:3 stream should be zoomed? Right?
> >
>
> That is strange because I test if width/height <= 1.5. And that is the
> width and the height of the frame I am processing. So it should not do
> anything about streams in 16:9.
>
> What kind of stream is it? Is it possible that it starts in 4:3 and
> then switches to 16:9?
>

> Mårten
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>

The formula used to determine the aspect ratio is based on video resolution
only. For instance, video at a resolution of 1920x1080 would pass as 16:9.
however, a resolution of 1280x1080 would not even though the picture is
16:9.

Myth gets the correct aspect ratio from the video itself. Can that be used
instead?

- Mark.
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