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I have 1 source file 1920x1080 where I have to only show different parts of the video (eg 200x200) in small windows on the same screen.
controlled from cmdline.

What I do right now are to multicast the file
vlc E:\media\test.mpg --loop --sout=udp://239.0.0.1:1234

Then I can run 3 x multicast reciever
VLC.exe udp://@239.0.0.1:1234 --width=270 --height=540 --video-x=570 --video-y=270 --no-autoscale --no-embedded-video --no-video-deco --loop --video-on-top --video-filter=croppadd --croppadd-croptop=100 --croppadd-cropleft=300
VLC.exe udp://@239.0.0.1:1234 --width=270 --height=540 --video-x=840 --video-y=270 --no-autoscale --no-embedded-video --no-video-deco --loop --video-on-top --video-filter=croppadd --croppadd-croptop=200
VLC.exe udp://@239.0.0.1:1234 --width=270 --height=540 --video-x=1110 --video-y=270 --no-autoscale --no-embedded-video --no-video-deco --loop --video-on-top --video-filter=croppadd --croppadd-croptop=300

And by the location --video-x=570 --video-y=270 set where on the screen I do want the window and in the crop I can define what part of the source to show

It does work.... but I need 20 windows and this use a lot of CPU (to much) to decode all the streams
So there must be a way to duplicate the file 20 times on the same screen?

Please advise

Thank you

You can duplicate the video with the clone video splitter. But you cannot position and duplicate the video from the CLI at the same time.

Thank you for feedback

I tried vlc E:\media\test.mpg --loop --video-filter=clone --clone-vout-list "caca,glx" --clone-count 2
And qoute som combination of this, but I never got more than 1 output.

I did test on VLC 2.1.5 on Win7

Could you please show the cmdline for this?

splitter, not filter.

Got it to work, thank you.

Have testet with Clone, Duplicate and Wall all same result
You are right I can't position and crop each window individualy

Do you have any idea other than the way I do with 1 stream and many decoders?

I don´t know any simple solution.