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

Mark Buechler mark.buechler at gmail.com
Tue Feb 26 17:21:58 UTC 2008


On Tue, Feb 26, 2008 at 10:54 AM, aaron <memoryguy at gmail.com> wrote:

> On 2/26/08, Mårten Bohlin <mabo at mochc.net> wrote:
> >
> > Yes it should be enabled by default and the logos should in most cases
> > be outside of the detection area. But I had to adjust the detection
> > limits a couple of times to get it to work with all of my channels. So
> > my guess that it is some more adjustments to e done. For instance your
> > black bars might not be black enough.
> Okay, if other stuff doesn't work, I'll try taking a closer look at
> the code and see if I can figure out how to tweak stuff. I can code,
> for sure, but video/image processing algorithms often goes over my
> head.... :)
> Hm, just had a thought... I'm in NTSC-land (Canada). Could the
> difference in resolution from PAL be a factor here?

I would imagine what would have more of an effect is black in PAL vs. black
in NTSC.

> >
> > If you could make a sort recording that I could download, I could have
> > a look at it. (If you dont make the adjustments yourself).
> I'll look into doing this if I can't make progress on my own.
> >
> > If you do not get any output with the verboseflag you could try to
> > switch to half zoom and then activate the autodetection again from the
> > menu. That should make it to switch to either Off or Full and then log
> > why it did that.
> Ah, excellent idea. I'll give that a try. I must have been tired last
> night; it didn't occur to me to try that.
> --
> aaron
> "Oh oh oh. I'm incoherent with excitement. Please tell me what fascinating
> bit of badger-sputumly inconsequential trivia you will assail me with
> next."
>        -- Arthur Dent
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