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Blurry artifacts in exported video

New Here ,
Dec 14, 2020 Dec 14, 2020

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Hi,

 

I'm having some troubles with motion blurred artifacts in my exported video. I've tried numerous formats and presets, but the artifacts won't disappear.

 

In the preview render in PPro there isn't any problems, it is only upon exporting.

The videos that create the trouble are situated in a nested sequence slowed to 80%.

 

You can see the issue in screenshots below on frame 2. It's literally just one frame that creates these troubles, and it exists throughout the videoclip.

In the latest export I just used the YouTube 1080 Full HD preset, and I didn't change any settings. 

 

Does anyone have an idea of what I can do?

Frame 1.pngFrame 2.pngFrame 3.png

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Error or problem , Export

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correct answers 1 Correct answer

Advisor , Dec 14, 2020 Dec 14, 2020

Check to see if you have 'optical flow' turned on for this problem clip that you have slowed to 80%.

If it's on then this is causing the issue. Optical flow is not correctly tracking the pixels - which sometimes happens. In your case it's probably because the shot is defocussed.

So, if the above is the case, then for just this shot switch from optical flow to 'frame blending' instead. The slow motion won't be as nice but it will get rid of the distortion

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Advocate ,
Dec 14, 2020 Dec 14, 2020

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Try exporting to intermediate codec (Cineform, DNxHR, Prores) and then use 3rd party (x264) compression tool. Here are ready to use delivery presets (x264/x265,  windows) :

https://1drv.ms/u/s!Andr88T403SpgQS30wO9EbgmkWAj?e=DY3HGV

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Advocate ,
Dec 14, 2020 Dec 14, 2020

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1) create a desktop shortcut for a .bat file "make Proxy 540p [.mp4].bat" (you can rename it after)

2) Now just grab the video files you want to process and drop them on that shortcut

3) Enjoy)

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Advocate ,
Dec 14, 2020 Dec 14, 2020

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ahh, messed up with copy pasting

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Advisor ,
Dec 14, 2020 Dec 14, 2020

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Check to see if you have 'optical flow' turned on for this problem clip that you have slowed to 80%.

If it's on then this is causing the issue. Optical flow is not correctly tracking the pixels - which sometimes happens. In your case it's probably because the shot is defocussed.

So, if the above is the case, then for just this shot switch from optical flow to 'frame blending' instead. The slow motion won't be as nice but it will get rid of the distortion

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New Here ,
Dec 15, 2020 Dec 15, 2020

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Cheers, thanks a lot! This fixed the problem 🙂

 

Yeah, it doesn't look as nice, but I'll make it work! 

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Advocate ,
Dec 15, 2020 Dec 15, 2020

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btw, just changing the order of effects (optical flow before blur) may also help, worth to try I think

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