Quote:
Originally Posted by Sharc
Yes, I see these artifacts as well on the PC when playing the IVTC'd downscaled clip. Without downscaling it looks ok. So it seems to be the scaling which is the culprit. Don't know an easy fix, other than in postprocessing.
For DVD footage you won't have this scaling effect, or much less as the original source is 720x480 only.
In Avisynth it's slighly better, but it's also there.
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I only see very minor sawtooth effects on the car's chrome trim on my PC with my SD IVTC'd encodes; not anywhere near as prominent as on my BD player. They are very minor when played on my WD Live TV hardware player too (which outputs an analog 480i video signal to my CRT TV, the same as my BD player does). Minor effects like that are normal / to be expected; the problem is that my BD player exaggerates them quite a bit, and even more so with that piped-to-x264 encode that I tried.
And yeah, with the source file there are pretty much no sawtooth effects when played on my PC, but it does have some judder in panning scenes, which my IVTC'd encodes don't have. The source file also has the same prominent sawtooth effect as my plain IVTC'd encodes have when played on my BD player.
Film-source DVDs are normally scaled down from a 2K or 4K master (not counting early ones that used D-1 masters, which are 720x486). I wonder what type of scaling filter they use. I've been using Lanczos.