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How to maintain aspect ratio of movie when going fullscreen?

January 5, 2010 | 3:32 am

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


January 5, 2010 | 11:10 am

hi,

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

– Pasted Max Patch, click to expand. –


FP
January 5, 2010 | 12:25 pm

or this :

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January 5, 2010 | 1:50 pm

Here’s what I often do. Two possibilities:

best,
Zachary

– Pasted Max Patch, click to expand. –

and/or

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January 7, 2010 | 7:06 pm

Thanks all, those all work great!


August 18, 2013 | 3:29 am

This helped me too, thanks.


August 19, 2013 | 11:42 am

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


August 22, 2013 | 7:06 pm

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. –

August 22, 2013 | 7:08 pm

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. –

August 23, 2013 | 2:19 am

@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


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