Hi, I see the image issue has been fixed on 18.07. Thank you for your work!
However, I found that when a text is added with text filter, rendering is very coarse in 18.07.
Please see the following image. (I use the same MLT file but application version is different.)
[Left side: 18.05]
- Bad: image issue when size filter applied (You can see grey artifacts from green logo on bottom right)
- Good: smooth text rendering
[Right side: 18.07]
- Good: image issue fixed (No artifacts!)
- Bad: Text rendering is very coarse (it seems antialias is not working on the text)
You are looking at the preview, which is using Settings > Interpolation that is probably set to Nearest Neighbor. The text compositor changed in v18.07 to fix a different compositing bug and to offer motion animation with sub-pixel rendering. Export interpolation settings defaults to bilinear, which is better quality. Try viewing the export.
OK, I just tested it, and I can confirm the text edges are not as clean and anti-aliased on v18.07 even with interpolation set to bilinear. I will look for a solution.
UPDATE: This has been fixed for the next release v18.08.
@shotcut: in May '18, you wrote:
For in-app preview, it uses Settings > Interpolation. For export, it uses Export > Video > Interpolation.
Pardon the newbie question, but I see a menu-bar “Settings” menu and not an “Export” menu–how do I get to this option? (I did find an Interpolation setting in the Export pane, having pressed Advanced, after Deinterlacer, but I presume it’s only for the deinterlacing; at any rate, I set it and saw no result when I exported again.
What I’m going for is what you’ll see in the lowest-right scaled inset below (which I scaled from the base image with Photoshop & nearest-neighbor). What I’m getting is the inset Shotcut scaled in the video, just “behind” it. (Some might think I’m splitting hairs, but the high-frequency (sharp) edges, even on the scaled pixels, prevent the eye from thinking they need to re-focus; even though its scaled antialiased text, it’s more comfortable; clearer to my eye.)
P.S. Is there an easy way to put, say, a red border or drop shadow around the inset to help people feel that it’s not a part of the base image?
BTW: thank you for all the hard work and this great gift to the community!
PPS: You may need to view the image away from the Web page to see the subtleties best–the page scales it yet again!..
PPPS: Worse, the image-uploading process seems to not only blur the image, but change all the colors: amping up saturation! (I have clean pixel-boundary green/white edges around the bottom-right-most “Sell” round rectangles here) In a forum like this, where I think we all care (overly?) about colors and edges, might it be useful to turn off the perhaps-helpful-elsewhere image-mangling–assuming the site software allows it?
Feel free to start a new thread, I’ll respond there.