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    Multiple Stage output

    Troubleshooting and Bug Reports
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    • craigw
      craigw last edited by

      Hi, I've been experimenting with 1 video in and sending it to 4 stage outputs. However, I've notices the frame rate decrease with every stage I add. Meaning 1 stage it runs at 30fps. 2 stage each 15fps. By the time I'm at 4 it's noticeable stuttering video. My mac does it and PC using a AMD Radeon 6 output card does it too. My original thought was to use Izzy for monitor tiling (Putting 4 monitor together to make up 1 big one). Hmm.

      OS 10.15.7 Catalina 2017 MacPro, 32g Ram ,AMD FirePro D700 6144 MB. Isadora v3.2.1 Los Angeles CA

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      • Skulpture
        Skulpture Izzy Guru last edited by

        Are you playing HD videos?

        Graham Thorne | www.grahamthorne.co.uk
        RIG 1: Windows 11, AMD 7 Ryzen, RTX3070, 16gig RAM. 2 x M.2 SSD. HD. Lenovo Legion 5 gaming laptop.
        RIG 2: Windows 11, Intel i19 12th Gen. RTX3070ti, 16gig RAM (ddr5), 1x M.2 SSD. UHD DELL G15 Gaming laptop.
        RIG 3: Apple rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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        • craigw
          craigw last edited by

          Yes, It's live HD video via Blackmagic PCI card. I've tried other capture devices also though. If I only use one stage it's good. The problem is when I add more.

          I use a video watcher to get the video and then that one output goes to 6 projectors for the 6 stages.

          OS 10.15.7 Catalina 2017 MacPro, 32g Ram ,AMD FirePro D700 6144 MB. Isadora v3.2.1 Los Angeles CA

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          • mark
            mark last edited by

            Dear Craig,

            Mark Coniglio, creator of Isadora here. This is a very heavy patch no matter how you slice it. You're attempting to take a full HD image and upload it to six separate graphics GPUs. I'm not sure you're going to be able to achieve this at full frame rates.
            I assume you are eventually outputting to video projectors. Are your six video projectors all 1920x1080 resolution? If not, capture at a smaller size -- that will reduce the bandwidth, and thus improve performance.
            If you are attempting to "tile" images, you can also improve performance by using the Chopper or Chop Pixels actors to "chop" the HD image into six smaller parts. That means less bandwidth for each Projector output, which is the actor that does the job of getting the image uploaded to the GPU.
            When you say "My mac does it and PC using a AMD Radeon 6 output card does it too" -- are you saying you are able to output the video to six projectors using some other software or configuration? Please explain. That might allow me to guide you further.
            Best Wishes,
            Mark

            Media Artist & Creator of Isadora
            Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

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            • keftaparty
              keftaparty last edited by

              Hi craigw,

              I've had that kind of issues with isadora too.
              I think there is a "trick" that can improve your performances.
              For this you have to use the AMD GPU with eyefinity ( and 6 outputs on the same card ).
              All your video outputs must have the same resolution.
              You need to create a eyefinity group with all your outputs.
              Isadora will see it as a single monitor ( with super high resolution ).
              You use it as a single stage, and then you use several projectors, to place each image where it has to be.
              No garanty it works, but I've had in the past good results doing this.
              Feedback any result if you try it.
              Mehdi

              ...
              Mehdi Toutain-Lopez
              www.toutain-lopez.com

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