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    Deinterlace a live stream with FFGL

    How To... ?
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    • F
      fifou last edited by

      Hi all,

      Since I can natively capture my live stream from my BlackMagic Intensity with Isadora, the only thing I miss is to deinterlace it.
      I mean deinterlace in vid-gpu mode. I searched a lot on the net in FFGL plugins but didn't find one.

      Any idea ?

      Thanks

      Philippe

      MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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      • DusX
        DusX Tech Staff last edited by

        I assume you are capturing as a single video stream.

        So your video is probably alternating frames even and odd.
        You would need to buffer a frame so that you always have a odd and even to combine.
        I believe you can find shaders that combine odd and even textures, so wrapping that up as a FFGL plugin should be possible. That said, I don't know you comfort level with this type of coding...
        So it may be best to add it as a feature request: http://troikatronix.com/support/isadora/

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        • F
          fifou last edited by

          I'm sorry I do not have the required level to code a FFGL plugin !
          Feature request added..

          I will stick with vid-cpu for the moment.

          Thanks

          Philippe

          MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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          • mark
            mark last edited by

            Dear @fifou,

            As noted on this page
            http://vidvox.net/forums/viewtopic.php?f=22&t=8079
            there is no built-in de-interlacing as part of the Blackmagic API, except if you upscale SD to 720p.
            But on that same page, there is a Quartz Composer de-interlacer plugin. Maybe that will give you the performance you need?
            Note that converting from Core Image (Quartz Composer) vid-ci and back to vid-gpu is not very heavy. Give it a try and report back.
            Best Wishes,
            Mark

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

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            • F
              fifou last edited by

              Thanks a lot Mark,

              I'm trying to do what you said, it works. But I cannot find a way to convert back a vid-ci stream to a vid-GPU. (didn't find some "Image to Texture" actor)
              I need some vid-GPU processing after capture.

              Best,

              Philippe

              MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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              • mark
                mark last edited by

                Ah yes, you're right. There isn't a converter for that.

                Let me just say that we're working some stuff that will allow you to solve your problem, and many others like this. Please be patient and we'll get you the tools you need to do this in relatively short order.
                Best Wishes,
                Mark

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

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                • F
                  fifou last edited by

                  Thanks Mark.
                  I will stay in vid-CPU mode for the moment.
                  But Native BM capture works well.
                  I don't need no more the use of Black Syphon -> Isadora. It's great :)

                  All the best,

                  Philippe

                  MacBookPro 15' 2012 - QuadCore i7 @ 2,66GHz - 16GB RAM - NVIDIA GeForce GT 650M 1024Mo VRAM - 2 Internal SATA SSD Hard Drives - OSX10.13.6 - Isadora 3.0.7

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