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Convert 25p to 50p using Optical Flow Edius X

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  • Convert 25p to 50p using Optical Flow Edius X

    Apart from the rendering being slow on high quality Optical flow it did a very smooth conversion (no frame doubling) of the 25p to 50p.

    I note the CPU's are maxed out and it really isn't possible to get on with any other editing whilst rendering is going on.

    However one small section of the clip produced some weird results as the camera was panning past my car radiator grille as per screen SNIP attached.

    I tried it also on some walking forward material with some white fence posts on the left of the pathway and some frames had the top of the fence post have a ghost added in the direction of movement.

    Are these artifacts something that needs looking at?


    Attached Files
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  • #2
    yes, these have been reported since optical flow was added
    Anton Strauss
    Antons Video Productions - Sydney

    EDIUS X WG with BM Mini Monitor 4k and BM Mini Recorder, Gigabyte X299 UD4 Pro, Intel Core i9 9960X 16 Core, 32 Threads @ 4.3Ghz, Corsair Water Cooling, Gigabyte RTX-2070 Super 3X 8GB Video Card, Samsung 860 Pro 512GB SSD for System, 8TB Samsung Raid0 SSD for Video, 2 Pioneer BDR-209 Blu-ray/DVD burners, Hotswap Bay for 3.5" Sata and 2.5" SSD, Phanteks Enthoo Pro XL Tower, Corsair 32GB DDR4 Ram, Win10 Pro


    • #3
      And I get similar artefacts on other programs with optical flow so I don't know if it can be "fixed".
      EDIUS silver certified trainer.
      Main edit laptop: DVC Kaby Lake desktop processor laptop, 32GB RAM, 3.5Ghz i5 desktop processor, nVidia 1060, Windows 10.
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      Desktop: 2Ghz 12 core Xeon processor, 32GB RAM, nVidia 1060, BM Intensity Pro, Windows 10


      • #4
        Yes, same here, I was using TWIXTOR in after effects before optical flow was introduced in EDIUS 8, it heavily depends on how shot was taken.
        Program has to create extra frames between existing ones based on that information. Depending on contrast, background (clear, detailed, blurred...), movement (pannig is more difficult), number of fps you get different results. Leaves on tress and woody background (if it's not blured) is very confusing and almost impossible, sand and water too, resulting in guessing wrong where all that similar almost blended detail is and where will be. Something moving from side to side is tricky too, moving from or to camera more pleasing. Fences almost always gets ghosting in my case too, depending how dense they are and how fast camera is moving.


        • #5
          Optical Flow can be magical or not so good depending on the clip.
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          • #6
            Also try the highest quality setting. Sometimes you can get better results but it can take a while to complete.

            Please don't send me Private Messages for support. Contact Grass Valley support


            • #7
              50i is still a thing - but everybody shoots 25 progressive and then wants 50P :)