04-07-2019, 09:12 AM | #1 |
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Image overlay zoom very poor quality
Hello,
When overlaying an image in my video, I am using the Video Processor opacity / zoom / location plugin to move my image over to the right in front of some video. When I use the zoom functionality to reduce the size of the picture, however, the quality of the image goes way down, it gets very pixelated and blurry. Is this normal? Example: https://imgur.com/Howmbrc It's a .PNG file, if that matters. |
04-08-2019, 05:23 AM | #2 | |
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I just had a look at this, and it seems there is some massive problem with Reaper image resize quality. I assuming that the fullscreen preview is the same as the full slow render, here is my very quick rough test:
https://www.learndigitalaudio.com/wp...om-quality.png Look at the top of the plane in the Reaper render, it is jagged and really bad looking. I have a horrible feeling we are seeing Nearest-neighbor interpolation, the lowest quality resize algo. If this is the case I am praying we can get at least Bicubic asap: https://en.wikipedia.org/wiki/Image_scaling Quote:
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04-08-2019, 03:58 PM | #3 |
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Thanks for the reply, at least I know it's not just me!
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04-08-2019, 08:20 PM | #4 |
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Did you turn the filter parameter to 1 (on)?
You can also use "image overlay" preset (and you'll probably have to enable the filter). This preset will allow you to use PNG which have transparent/alpha. |
04-09-2019, 02:47 AM | #5 | |
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Quote:
@hermbot, how about you?
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04-10-2019, 09:08 AM | #6 |
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with the filter parameter set to "on", overlay zooming results are still far from smooth. The same is true when zooming text overlays. I hope that these issue will get addressed soon.
.
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Check out AVConvert (free, super-fast media file manipulation via the right-click context-menu in Windows Explorer) and my free VST plugins. My Reaper tutorials and studio related videos on youtube. |
05-05-2019, 03:52 AM | #7 |
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I find the quality with the filter on enough, but the problem is when it comes to animating the zoom parameter with envelope or lfo. The zoom movement is not smooth, it stops for some frames, then zooms it a bit and stops again for some frames. This is clearly visible when the zoom is slow and just a bit. Try to animate the zoom in for example from 3.0 to 3.1 in 30 seconds. If you zoom enough and fast you don't notice. But I cannot figure out how to zoom slowly and smoothly.
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05-05-2019, 06:14 AM | #8 | |
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Quote:
This issue even prevented me from creating an example project with a slide show to give an idea whats possible with blend over, zooming, panning etc. I made some tests with Adobe Premiere and it never happened there. But at the moment I'm not into it so ... Greetings Eli
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05-05-2019, 01:31 PM | #9 |
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Thank you Eliseat
I am starting to catch up with all the video processing. Thanks for the link to that thread. It is exactly the problem I have. I was using the preset "Basic helpers: Track/opacity/zoom/pan" and in RGB colorspace in project settings. Now I changed to YUY2 or to I420/YV12 and it zooms much smoother. I'll keep investigating. So far changing &-2 to $-1 as Justin said in that thread doesn't seem to help in RGB colorspace. I'll just use YUY2 for now edit: I was testing on a new project and it seemed ok with a normal image. back with the project with the problem which has larger images, larger than the project resolution, and it is not smooth movement/zooming. I need to work with large images to zoom in. So this may not work... I really wanted to generate the video in REAPER Last edited by heda; 05-05-2019 at 01:40 PM. |
05-07-2019, 12:48 AM | #10 |
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In fact the "panning while zooming problem" makes it impossible to use Reaper for serious video editing anymore, as I need this very often. That's a bummer because I like the concept of editing video like audio.
But what I didn't know is that it behaves differently in other color spaces. How could that even be? I will test that in the next days. But it still needs to get fixed somehow, because its very obvious especially for people who come from other video editors. I was pretty surprised when I realized the first time how bad the interpolation works. There must be something overlapping between pan and zoom. I don't know.
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05-08-2019, 04:58 PM | #11 |
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I posted some examples on that thread you told me. But I am ready to give up now.. and I am just zooming without panning.
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