peridian
23rd December 2012, 23:47
Hi,
I'm trying to encode all my DVDs to mp4. In particular I'm keen to try and keep the result as clean as possible, so that when it gets resized onto LCD screens of a higher resolution, they don't become too unsightly to watch.
To that end, I'm using Avisynth + VirtualDub. My script is QTGMC based, and works pretty well on interlaced DVDs. Some, however, are progressive to begin with.
I read somewhere that using:
QTGMC(Preset="Medium", InputType=1)
Would allow me to use QTGMC on a progressive input, but gain some of the cleaning that QTGMC does (e.g. degrain/denoise).
I tried it, and at first I thought it was doing a good job, but then I noticed (particularly on outdoor shots or where credit overlays were being shown) this strange kind of "wobble" in the image, almost like a heat haze effect.
It doesn't do this on interlaced input. Is this a property of using it on progressive?
Is there a way I can use QTGMC to do some cleaning of progressive without this wobble? Or do I need to look at doing the cleaning through alternate function calls?
I've tried using things such as dfttest (blew up), fft3dfilter (seems to have a slightly less pronounced form of the same problem), and no cleaning at all.
I just can't help but feel the output might be better and that QTGMC has the relevant settings built in to achieve this.
Any help would be appreciated.
Regards,
Rob.
I'm trying to encode all my DVDs to mp4. In particular I'm keen to try and keep the result as clean as possible, so that when it gets resized onto LCD screens of a higher resolution, they don't become too unsightly to watch.
To that end, I'm using Avisynth + VirtualDub. My script is QTGMC based, and works pretty well on interlaced DVDs. Some, however, are progressive to begin with.
I read somewhere that using:
QTGMC(Preset="Medium", InputType=1)
Would allow me to use QTGMC on a progressive input, but gain some of the cleaning that QTGMC does (e.g. degrain/denoise).
I tried it, and at first I thought it was doing a good job, but then I noticed (particularly on outdoor shots or where credit overlays were being shown) this strange kind of "wobble" in the image, almost like a heat haze effect.
It doesn't do this on interlaced input. Is this a property of using it on progressive?
Is there a way I can use QTGMC to do some cleaning of progressive without this wobble? Or do I need to look at doing the cleaning through alternate function calls?
I've tried using things such as dfttest (blew up), fft3dfilter (seems to have a slightly less pronounced form of the same problem), and no cleaning at all.
I just can't help but feel the output might be better and that QTGMC has the relevant settings built in to achieve this.
Any help would be appreciated.
Regards,
Rob.