View Full Version : Need help IVTCing a portion of a clip


Chainmax
3rd October 2004, 02:46
I am trying to encode one of the extras from my "Simpsons 1st Season" DVD. The script is almost done, and stepping through it in VDubMod reveals a pleasing result, but there's one section of the clip that doesn't look too good. Some frames after a completely dark scene show a lot of interlacing. I've gone from using KernelDeint as a postprocessor to using post=2 and back=1 (the latter removing some leftover combing from other sections of the clip) to increasing the nt switch to absurd values to reducing dthresh to 5.0 without results. From what I could see, only this section of the clip is problematic, the rest of it appears to be fine. What are my options now? A clip with the scene can be downloaded from here (http://www.31012.com/~azulftp/ProbSamp.vob).

tritical
4th October 2004, 03:04
Well, I don't usually pimp my own filters and maybe you've already fixed the problem... but since no one replied I thought I might as well. I guess the problem areas your talking about are the parts where a 60i fade has been put on top of the animation. TDeint v0.9.6 with the tryWeave option correctly handles the clip you posted. On the fade where there is no good match it correctly deinterlaces it and on the rest of the clip it chooses the correct field and weaves it. I would be interested in the results you get if you replace the Telecide() line you are using with just TDeint(), defaults seemed to work well for the little section of clip you posted. Then put decimate() or whatever after as usual since TDeint() will just recover the progressive frames.

Chainmax
4th October 2004, 23:53
Oddly enough, the problem hasn't appeared again. How can a 60i fade be put on top of a 29.97fps telecined stream, anyway? Nevermind, I forgot to check the TDeint thread...wow, it sure has grown in features. I'm going to read the help file later, but this newest version could be just what my simpsons rips need. Can you include a decimation feature in the next version? Pretty please? :)

I will post a link to download a fully filtered version of the whole clip (with TDeint+Decimate) as soon as it's done. It will take up about 12 Megabytes. Thanks a lot for this awesome filter :):).