[mythtv] Automatic zoom to remove black borders for dvb

[Dennis Tell]

Indeed. Thanks for that, just what I needed. The "fill" mode wasn't
mentioned in the on screen menu, or in the keys.txt file, and I wasn't using
"w" to access aspect ratio options, just the menu, so I never discovered
it...

About your suggestion; I'm wondering when and how the video stream aspect
ratio would be incorrectly detected. Isn't it enough to set it once and for
all for each channel?

>From a user point of view, it seems to me that it wold be nice to get away
from the concepts of aspect ratios, zoom and stretch. All the user cares
about is where the black bars are and how thick they are. So I'd like to see
the following three options:

1. Zoom to remove vertical black bars. (your b)
2. Zoom to remove top and bottom black bars. (your a)
3. Zoom to midpoint between 1 and 2.

These three modes would not just consider the aspect ratio and size of the
video stream, they would also look at the actual image content, which would
be useful for dvb channels that sometimes broadcast a 720 wide image with
thick black bars on the left and right side. Without looking at the pixels,
there is no way to determine whether those bars are there or not.

On 10/1/05, William Uther <willu.mailingLists at cse.unsw.edu.au> wrote:
>
> Hi,
> As I'm sure others will also tell you, there already is a simple
> mechanism for this. If you hit 'w' then the system will cycle
> between various 'aspect ratio overrides'. Two of them are 'Fill',
> which zooms in so that the image fills the entire screen, and 'Off',
> which zooms out so that the entire image fits on the screen. It also
> has a bunch of other settings there which allow you to override the
> aspect ratio in other ways. There is also a global setting that
> allows you to set the default. My global setting is "Fill".
>
> Anyway, if you're still interested in coding, there is still stuff
> there that could be improved (he says without an attached patch :).
> In particular, the current options conflate a few things that might
> be separated: What happens when the aspect ratio of the video stream
> is incorrectly identified, and what do you do when the video aspect
> ratio doesn't equal the screen aspect ratio. These should be two
> separate controls, but are currently both in the list of options you
> switch between with 'w', making that list longer than it needs to be.
>
> If the two aspect ratios are not equal then there are a bunch of
> ways to resolve that, but the three main ones are a) Zoom in to fill
> the entire screen (currently 'Fill'), b) Zoom out to see the entire
> image (currently 'off'), and c) stretch the image to match aspect
> ratios. I'd have 'w' switch between just these three options. Then
> there should be a second button to allow the system to override the
> video stream aspect ratio: "No override", "4:3", "16:9". The display
> aspect ratio doesn't need to be set dynamically.
>
> Be well,
>
> Will :-}
>
>
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