How to maintain aspect ratio of movie when going fullscreen?

Jan 5, 2010 at 3:32am

How to maintain aspect ratio of movie when going fullscreen?

I’m using a patch that reads in a 16:9 formatted movie, and sends it to play fullscreen on a 4:3 projector. It seems that by default, the playback chain I am using stretches the movie to entirely fill the frame, so it becomes distorted.

How can I ensure that the aspect ratio is maintained (ie adding black bars top and bottom) when projecting a 16:9 movie via a 4:3 display?

I am using a jit.qt.movie -> jit.gl.slab -> jit.gl.videoplane -> jit.window

#47562
Jan 5, 2010 at 11:10am

hi,

don’t forget the ortho attribute of the jit.gl.render, it could be useful for video projection without 3d effect
try this :

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#171075
Jan 5, 2010 at 12:25pm

or this :

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#171076
Jan 5, 2010 at 1:50pm

Here’s what I often do. Two possibilities:

best,
Zachary

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and/or

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#171077
Jan 7, 2010 at 7:06pm

Thanks all, those all work great!

#171078
Aug 18, 2013 at 3:29am

This helped me too, thanks.

#259173
Aug 19, 2013 at 11:42am

the easiest way with max 6, is to use jit.gl.cornerpin @preserve_aspect 1

#259300
Aug 22, 2013 at 7:06pm

Hi guys,

I found this thread and has really helped me with a project I’m working on.
What I now need to accomplish, is to break up image (2880 x 576) into 2 blocks (1440 x 576 each), so I can use 2 projectors, each projecting half the image.
I’ve tried the jit.scissors object to divide the image but it is not giving me the right proportions after. Any suggestions?

– Pasted Max Patch, click to expand. –
#259672
Aug 22, 2013 at 7:08pm

Hi guys,

I found this thread and has really helped me with a project I’m working on.
What I now need to accomplish, is to break up image (2880 x 576) into 2 blocks (1440 x 576 each), so I can use 2 projectors, each projecting half the image.
I’ve tried the jit.scissors object to divide the image but it is not giving me the right proportions after. Any suggestions?

– Pasted Max Patch, click to expand. –
#259674
Aug 23, 2013 at 2:19am

@ALLABOUTD
One possibility is to create one single and to position it with the message relative to your projectors screen size, assuring to position your exactly in the middle of your overall screen size (= size projector 1 + 2).

Best,
Helmuth

#259682

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