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flickering artifacts along the edges
I’m experiencing an issue while editing in Vegas Pro 20. I took a PNG screenshot from a 4K progressive video and applied a slow zoom motion using the Event Pan/Crop tool under Video Event FX. However, in both the preview window when editing and the final rendered footage, the image shows flickering artifacts along the edges of objects during the zoom.
This issue is most noticeable around detailed edges, such as windows, doors, roofs, and similar structures. You can see the problem in the video sample – pay attention to the windows click here https://drive.google.com/file/d/1SFM0vhIqt3H96LqHIIrpClzdekWn7kvY/view?usp=sharing
In my project properties:
Resample mode is set to Disabled
Deinterlace method is set to None
Render output is 1080P 59.94
Video source properties: 4K 59.94
Any suggestions on how to fix or reduce this effect would be greatly appreciated.
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2 Replies
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Hey John,
Had to download your clip to see the artefacts – very short, so blink and you won’t notice it, but they are there as you described it.
A couple of things to try, only to see if it dissappear.
1. What happens if you export to interlaced video?
I know that it is not what you want, but does it go away?2. Try another file format instead of PNG, like JPeg?
3. Not sure if your timeline is 4K, and you are exporting to a final master in 1920×1080 HD?
Or if it is that specific clip?
What happens if you make the source HD?
Or do the export to 4K?4. Your Deinterlace set to none. Is that for the whole time timeline, or for the clip itself only? It might be worth deinterlacing just that clip?
Sorry for not giving you a clear answer, but as it appear on two different screen shots, it is more likely to be the process, than the individual clip. And there is a near infinite number of reasons for what can cause it. But try the above first.
Hope that this helps you.
Atb
Mads -
Hi Mads, thank you for advice !
1. export clip to interlaced video looks good 🧐. Hmmm why? 😯
2. another file format instead of PNG, like Jpeg don’t help
3. timeline is 4K, and exporting to a final master in 1920×1080 HD and also in 4K is same problem
and all clips. if I make the source HD same problem
4. Deinterlace is set to none for the whole time timeline. Deinterlacing just that clip did not help. All my clips are Progressive.
I tried Gaussian Blur FX method and helped. So I applied it to all affected media, and the final render looks good.
But now the question is: why did this issue happen? The moiré patterns caused by scaling appear on almost all the media in my project.
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