by Qyot27 » Tue Oct 13, 2009 12:43 am
Now that I took a look at the samples in motion, I'm convinced that what you're seeing is - considering you said you were using lanczos as your resizer - ringing artifacts. It's the Lanczos algorithm that creates it. The possible solutions are to pick a different resizer (you could try the Spline family of resizers, for instance), or to look for a specific anti-ringing plugin. I don't know of any offhand, though.
As a general tip when asking for help with a source, don't use JPEG for screenshots. Use PNG, because then there won't be any additional artifacting produced from the compression.
And if you're looking to make for easy compression of an end product, Lanczos is not going to help the situation - it's designed to retain sharpness, which adds to the compression cost (meaning it'll need a higher bitrate to look good). You could try Bicubic or, if you prefer a softer-looking image, Bilinear resizing.