[mythtv] Patch to autodetect 4:3 Zoom aspect ratio

[Mark Buechler]

This is a lot closer for me. However, it's not 100%. There seem to be a few
occasions where once in widescreen mode, it won't correctly detect 4x3 (only
commercials so far). But then again, I don't know that this sort of thing
CAN be 100%.

- Mark.

On Wed, Feb 27, 2008 at 12:33 PM, Matt S. <skd5aner at gmail.com> wrote:

> On Wed, Feb 27, 2008 at 8:49 AM, Mårten Bohlin <mabo at mochc.net> wrote:
> > On Wed, Feb 27, 2008 at 2:15 PM, aaron <memoryguy at gmail.com> wrote:
> > > On 2/26/08, aaron <memoryguy at gmail.com> wrote:
> > >  >
> > >  > Although it's not perfect. It *seems* (haven't played enough, and
> it's
> > >  > time for bed...) that the case where the channel logo partially
> covers
> > >  > the black bar it fails to detect that it's letterboxed.
> > >  >
> > >
> > >  Okay, I tried a couple more videos and you were right, Marten (please
> > >  forgive my spelling, I don't know how to enter the correct "a")
> > >
> > >  The detection does not get fooled by the channel logo, nor the rating
> > >  logo (that is, the giant "PG", "G", etc) up the top left corner.
> > >  Excellent!
> > >
> > >  But it's still not detecting properly for some recordings. In my
> case,
> > >  an episode of Stargate Atlantis stays in "Off" mode, but then
> switches
> > >  during the commercial break when the commercials are letterboxed. And
> > >  on an episode of The Office it keeps jumping back and forth during
> the
> > >  episode.
> > >
> > >  The bars on The Office look (to me) about as dark as other shows that
> > >  don't have a problem. Stargate's boxes are a little lighter, but I
> > >  didn't think they were *that* much lighter ... they're still darker
> > >  than the "black0" pillarbox colour.
> > >
> > >  When I get a chance I'll try digging into the code a bit more. Alas,
> > >  my free time is often very limited. I *may* get a chance this
> > >  weekend....
> > >
> > >  But, on a positive note, when it does work correctly it's a great
> feature :)
> > >
> >
> > Hi! Thanks to everybody that tests this patch and are giving me feed
> back.
> >
> > I have adjusted it now so it should not be to picky about the 4:3
> > aspect of the source video. And I have also added a cool debug mode
> > that shows where detection is done. It also paints a black box in the
> > top left corner that is the brightest version of black that is
> > considered as black. (I can not see it on my screen since it looks
> > totally black)
> >
> > Here is a snapshot of it and explanation of how to reed it:
> > http://www.mochc.net/myth-dev/LetterBoxDebugg.jpg
> >
> > To enable it turn it on in the Adjust Fill menu. I hope that this will
> > help us to get all the parameters perfect for everybody.
> >
> > /Mårten
> >
> > _______________________________________________
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> > mythtv-dev at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev
> >
> >
>
> Cool, and very useful, feature!  I would recommend opening a ticket in
> trac and submitting this as an enhancement.  Even though it's not
> quite ready for inclusion, you can at least keep track of your patches
> and process in a ticket so that when it is ready it can be considered
> for inclusion.
> Thanks!
> Matt
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