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TCP Streams?



  • Hi,

    I was wondering if there is a way to get more than 4 streams on the stream id of the TCP stream control and TCP Send Data. Is this a restriction of TCP/IP or in Isadora?

    I essentially want to send pjlink commands to more than 4 projectors at a time. I can send to 4 easily by assigning a separate stream id for each command. Ideally I want to avoid having to offset the timing of commands.

    Thanks very much.

    Cheers,

    Cam.


  • Tech Staff

    I don't know if this is a limitation of the TCP library (@mark) being used, but it is a current Isadora limitation.

    If you don't need tight timing on the commands you can chain the usage of the 4 streams. The stream IDs can be reused as soon as the current command is cleared.



  • @cambrucedavis said:

    I essentially want to send pjlink commands to more than 4 projectors at a time.

    The limitation is in Isadora. When I added this feature, I simply didn't think people would need more than four at a time. I spent some time to see if there was a way around this in Javascript, but it can't access an arbitrary port. From a very brief reading it seems like it could be possible if you run NodeJS on your computer and then use socket.io – though I can't say for sure. (@DusX ?) Anyway... I'm afraid I cannot offer a simple solution to this.

    Best Wishes,
    Mark 


  • Tech Staff

    @mark @cambrucedavis 

    Javascript doesn't offer any external ports as included in the V8 engine, those features are browser specific.
    So unfortunately it is no help in this situation.



  • Thanks Mark and Dusx,

    I think I'll be able to get away with shuttering in waves this time, but I wonder if it is a limitation that can be opened up in a later version? I am using PJlink commands to control the internal shutters on 10 projectors. I am doing them 4 at a time with a 0.3 sec delay to clear the streams.

    Cheers,

    Cam.


  • Tech Staff

    @cambrucedavis

    When and where is the show? I would be interesting in seeing what you've been working on. 


  • Tech Staff

    I wish someone would make a new PJ Link How-To thread. There are around 3 old threads and I can never seem to get it to work for me. Personally, I'd love to have a PJLink/TCP tutorial as part of the TroikaTronix Knowledge Base.

    Best wishes,

    Woland



  • Sorry for the delay.

    @DusX  I am designing video for Magician's Nephew down at the Shaw Festival in Niagara on the Lake. Three of the shows in the festival theatre are sharing an Isadora rig and they'll be running all summer. We are just in previews now. I'd love for you to come check it out.

    @Woland I'l try to post a few user actors that I've put together for PJ-link / projector control. I have some that work with PJLink on panasonic projectors and a couple that can control a variety of Christie Projectors. I should be able to get those together in the next couple of days...

    Cheers,

    Cam.