How to maintain aspect ratio of movie when going fullscreen?

gpvillamil's icon

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

Antoine Villeret's icon

hi,

Max Patch
Copy patch and select New From Clipboard in Max.

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

FP's icon

or this :

Max Patch
Copy patch and select New From Clipboard in Max.

Zachary Seldess's icon

Here's what I often do. Two possibilities:

best,
Zachary

Max Patch
Copy patch and select New From Clipboard in Max.

and/or

Max Patch
Copy patch and select New From Clipboard in Max.

gpvillamil's icon

Thanks all, those all work great!

grizzzly540's icon

This helped me too, thanks.

Rob Ramirez's icon

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

allaboutd's icon

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?

Max Patch
Copy patch and select New From Clipboard in Max.

allaboutd's icon

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?

Max Patch
Copy patch and select New From Clipboard in Max.
Helmuth's icon

@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