So after all the little videos have been captured by each grab object (three on one computer, two on the other one), I use jit.qt.movie to put all these videos together and export a mp4 video file that can be read by five multimedia players that I bought (the simplest way I found to play five independent videos). Again, it's a MIDI note telling the program "ok, now make a big video out of all these little ones". I created a small video in black which I could load already at when opening the patch. This way I could set the export settings before hand.
The big problem I got was when I tried to append all the videos automatically into the qt.movie object. I know there must be a way, but I didn't have the time to find it! So what I did finally was writing the name of all the videos (which is always the same). The resulting patch is rather beautiful.
I had to use sprintf because I couldn't get a message to output file locations with the $1 system. So I spent quite a lot of time finding this out, until my savior Yoann Trellu told me about sprintf.
Conclusion: I love MAX and the way it works. It takes a lot of time to learn its mechanics, but I will continue exploring its possibilities. Next I want to dive into the world of MSP which I didn't have the time to even touch! The sound was captured directly with he write_audio message of the grab object.
If anyone is interested in knowing more about the patch I just tried to explain or about the project it was used for, please don't hesitate asking me. I will answer with pleasure to all questions and suggestions.
See you all!
Pablo
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