I am trying to get 4 different mp4 videos (4K) running on 4 Screens synchronized. Meaning that pause/play should effect all videos/screens at once. **Is there any patch out there that does that? **The one we have made so far works, but the performance is terrible (around 7 frames per seconds). Its doesnt seem to be a hardware limitation, as VLC has no problem playing 4x4k videos fluently on the 4 screens.

I have a i7 with 32GB Ram and a 1070 Nvidia.

Some more Info:

• mp4's basically dont work at all (around 1 frame in 20 seconds)
• list itemmov's with motion jpg codec do work, but its very stuttery ( 4-7 fps, as mentioned)
• list itemGPU is barely used when playing those movs, CPU is almost maxed out.
• list itemOn vlc everything runns smoothly, using the GPU around 40% while playing 4x4K videos.

So is there any patch out there maybe that does what I am trying ot achieve?

@paralion mp4 is a compressed format. Gem cannot handle compressed video (as far as I know.... I am not up to date with it).
If you convert to .mov or .avi you should have more luck (even though the files are bigger) as Gem will have no work to do.
David.

yes, mp4 didnt work at all actually. I tried with Mov and motionjpg codec, that was more fluent but still only 7fps.

@paralion With vlc you are presumably running 4 instances.
Are you doing that with Pd and syncing through tcp/ip or are you running them all in one instance of Pd and GEM?
What is your OS?
Why don't you want to use VLC?
David.

@david I want to shift to 4 instances and synching through PD, but we have just realized that even running only 1 4k video through PD is very laggy.
Concerning our VLC question: You mean controlling VLC through PD? VLC doesnt support synching 4 instances with on player panel natively. There is an option to do that, but only with 2 instances max.

@paralion I had a quick look the other day...... not far enough really.
But VLC has a number of options for remote control.
There is a remote app, where many computers can be controlled.
You enter the IP for the computer and it connects through ports to VLC.

If you were using 4 computers it would be easy.
I have run shows using keyboard sharing to sync 20+ computers running video playback, powerpoint, etc. ..... anything that has keyboard shortcuts.
https://www.inputdirector.com/

So anyway, the VLC listening port can be changed........ https://superuser.com/questions/369645/how-do-i-change-the-default-tcp-listening-port-for-vlc-http-remote-control-from and you don't care about the info sent back.
And what is the message format.

The message format could be unimportant if Pd could receive messages from the app on the pre-assigned port and resend the messages to instances of VLC.
So make a note of the normal port before you change anything.

You could then receive the messages in Pd on the normal port, and retransmit them to your instances of VLC.
Or if not there will be other software available.

Probably.
David.

@paralion PS....... getting old and forgetful..... but......
On one computer the easiest way will be with an autohotkey script. https://www.autohotkey.com/
Grab the window references and then grab the spacebar (or maybe some other key you will not be using) and when it is pushed send <space> to all the windows at once...... or <N> might be better for VLC.
https://www.ownedcore.com/forums/world-of-warcraft/world-of-warcraft-guides/91698-freebie-method-sending-keys-multiple-wow-windows.html

David.

@whale-av Thanks a lot! I know autohotkey but never thought of using it that way, will check it out. By the way I discovered there is a VLC extension called syncplay which was originally created for long-distance relationships watching movies together, but it serves my purpose very well and even works on 1 machine locally, with unlimited screens it seems. 4k x 4 wasnt a problem, Controlling via PD would be neat though, will check into that!