Zoom to Full Screen

[Anonymous]

A better zoom.

[cadbusca]

Just For My Info.. what kind of TV do you have? My Sony will stretch Wide, Wide Zoom and Full Zoom with a press of a TV button, so I have no need for the dpad fix and in fact use the dpad for realtime audio sync and subtitle size.
It was my assumption that all wide screen TV’s had this capability. Is that not true?

[rodries]

@jhb50

Yes I think your assumption is right – all widescreen TVs have that feature, and I don’t understand why someone would try to do this in WiiMC 😕

[Anonymous]

Zoom the picture.

[cadbusca]

Well, first of all you still have not answered the question of what make and model of TV you have. Secondly you seem not to understand that videos come in various aspects that simply cannot be properly displayed without black bars. It is pointless to offer a full (no black bars) zoom that simply distorts or chops off part of the picture. While you assert that lots of other players can do this perhaps you can define in words the logic/algorithm that you would like to have implemented that will full zoom without distorting or chopping off the picture. Oh and it should work for both 4:3 and 16:9 TV’s. With both of these answered perhaps we can find a way to help you.

[Anonymous]

A full zoom.

[cadbusca]

OK so you want to zoom the picture keeping the aspect ratio intact until all the black bars are gone.

By my calculations doing this will result in the following:
On a 16:9 screen and original aspect 4:3 zoomed to 16:12 will chop off 25% of the picture top and bottom.
On a 16:9 screen and original aspect of 2.35:1 zoomed to 21.15:9 will chop off 32% of the picture left and right.

Despite your assertions to the contrary, I have been unable to find media players that will do this. They will distort as required to fill the screen but I’ve been unable to find any option on VLC for example that will do what you want.
Perhaps you can explain how to achieve this but I would not expect much call for an option that will loose 1/4 to 1/3 of the picture.

[Anonymous]

Zoom it bigger.

[cadbusca]

All this zooming is way beyond me, so lets try some analysis.

I can see that VLC will maintain the aspect ratio as it crops, but it all depends on the aspect ratio that is set. With my test videos the default aspect ratios were not accurate and so VLC started with a distorted picture and maintained it. So 3 controls are needed to get the correct picture without black bars: F to eliminate the VLC bars, A to set the correct aspect ratio and C to zoom and set the crop to match the display.

In contrast with WIIMC, the aspect ratio setting sets the crop and it then takes the existing video and compresses or expands it to fit the crop. So if I set a 16:9 AR for a 16:9 screen the video will be fit into that and fill the screen.

So a 16:9 video will be correct, a 4:3 video will be stretched horizontally and a 2.35 video will be stretched vertically.And to fix and restore the correct aspect ratio we would need to stretch the 4:3 video vertically and the 2.35 video horizontally(both off the screen), but to do that with programming we again need to know the aspect ratio of the video we are fixing.

Similarly if I set a 4:3 AR for a 4:3 screen, the video will fit into that and fill the screen, so the 16:9 and 2.35 videos will be stretched vertically ,and the 4:3 video will be correct. And to fix that and restore the correct aspect ratio we need to stretch the 16:9 and 2.35 horizontally(off the screen). Again we need to know the aspect ratio of the video we are fixing and the target screen size..

The current manual stretch controls allow the user to manually stretch to fill the screen and current video aspect ratio. If WIIMC AR is set to Auto, this will require both vertical and horizontal adjustments, but if the WIIMC AR is set to the 16:9 Screen ratio it will fill the screen and it should only be necessary to stretch 4:3 (narrower)video horizontally and 2.35 (wider) video vertically which is much simpler than adjusting and resetting both.

So where does that lead us!

Lets take the common AR’s and figure out the adjustments for a WIIMC AR of 16:9 to fill a widescreen TV

16:9 no adjustment
4:3 = 16:12 = increase verticle by 3/9 = 33.3%
1.85:1 = 16.65:9 = increase horizontal by .65/16 = 4%
2.35:1 = 21.15:9 = increase horizontal by 5.15/16= 32.2%

So if we had a button that would loop thru these values it should do the job.

Actually this can be made into a formula that uses the Aspect Ratios of the target TV and the playing video to calculate the correct adjustments and implemented as a WIIMC enhancement…see below..

[cadbusca]

First, thanks to WES for raising this issue. Turns out his points are totally valid. A media player does need to provide easy to use zooming controls simply because the assortment of video sizes vary well beyond those used for TV programming for which the native TV zoom settings were designed.

With WIIMC, if the video being played has the same aspect ratio as the TV then the picture will be correct and totally fill the screen with the correct aspect ratio regardless of the WIIMC settings, however if the video aspect ratio differs from that of the screen, either black bars will appear or a distorted picture will fill the screen depending on the WIIMC setting, or you may manually zoom horizontally and/or vertically to adjust to your liking. As WES has pointed out all are cumbersome and impractical to use.

The better implementation is to determine the aspect ratio of the video and provide 4 settings that can be switched dynamically with the d buttons(Up and Down), with the video paused on the screen and map the video to the screen size in 4 ways: use the current WIIMC settings, display all of the video on the screen using the video’s aspect ratio(which may result in black bars), display all of the video on the screen using the screen’s aspect ratio(which may result in a distorted picture), maintain the aspect ratio and zoom the picture until the black bars are gone (this is WES’s Fullscreen Mode and may result in the cropping of either the top or bottom of the video picture), a partial zoom which eliminates the black bars and partially distorts the picture resulting in only half the cropping that occurs in Fullscreen Mode.

The second part of this implementation is the use of other d buttons(Left and Right) to zoom the picture proportionately in and out. This addresses the situation where the video itself has black bars embedded in the actual video frame, so the video must be clipped to eliminate them partially or totally.

The third part of the implementation is to display the aspect ratio and zoom values as they are changed on the video bar for immediate feedback.

The fourth part of the implementation is to do all that but also respect and not change the current WIIMC settings for screen zoom and shift which are more properly used to align a normal WIIMC picture with that of the TV.

Together these changes make the mapping and proper display of non TV aspect ration videos convenient and easy to use and I have successfully implemented them in the code for WIIMC+ Enhancement Pack 7 which is currently in final testing.

[cadbusca]

The changes described above for Dynamic Picture Size Control, along with an enhanced Video Bar that shows the current Audio Delay, Zoom, and Picture Size, are now part of the WIIMC+ V7 Enhancement Pack.

[cadbusca]

Attached is a “Guide to WIIMC+ Video Playback” which describes these use of these enhanced features.

[Anonymous]

Trying to read a license plate number in a photo but its too small? Zoom in. Make it bigger. Is this all Wes meant?

Because we are already talking about it. My wide screen tv has several different aspect ratios. Some time none of them give the full height or width of the screen without being distorted. Other times none of them give the proper aspect ratio unless I live with cutting off the top and bottom or both sides of the movie. Other times I have to watch with black bars on all 4 sides or live with the top and bottom being cut off to fill the full width of the screen. If i could grab the corner with the wii controller and drag it to change the aspect ratio. Then move it to center I will get the full picture and only have black bars on the top and bottom or just on the sides. Its not just the wii but any dvd player. Even if I set them up for wide screen. That would be a great option for any player.

[Author]

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