From: <bo...@eu...> - 2006-11-03 13:09:07
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Steven M. Schultz wrote: > On Fri, 3 Nov 2006, [UTF-8] Bernhard Fr=C3=BChmesser wrote: >=20 >> I am not sure, but i think the tape was used for recordings several=20 >> times before. >=20 > Ah, ok - a worn tape could cause dropouts. >=20 >>> medianfiltering the chroma only, then using yuvdenoise with moderate= ly >>> high thresholds (-t 6,10,10 and perhaps even add -m 4,8,8) will help= >> Hmm, yeah, this settings help a bit more with noise - cool... >=20 > For really bad noise you might also add -M 4,8,8 (this is the post > median filter applied after the -t filter). =20 Yeah, i have been playing around a bit yesterday night and the result=20 was not bad expect the scratch lines. >> I don=C2=B4t know GIMP very good, same for Photoshop. >=20 > Can always learn :) Somehow man would need a 48 hours day :-) >> Yep, the whole video has more than 150000 Frames and the lines are not= =20 >> always on the same place in the picture(s). So using the GIMP or=20 >> Photoshop would take ages i think. >=20 > Ok, that answers my question. If the lines are not consistently in > the same location then the filters I suggested will not be useful. >=20 > Restoration of video is time consuming - that's why it can take a > studio a year or two to 'remaster' a movie using 2K (or 4K) scans > of the film. >=20 >> Yep, some month ago i read about a programm that does scratch line=20 >> removal in a video it just copies nearby pixels in a radius which you = >> can set before, i remember it was only for Windows (unfortunately) but= i=20 >> can=C2=B4t remember the site :-( >=20 > Earlier there was a reply mentioning an avisynth filter - is that > the program you are thinking of?=20 No, i think it was a plugin filter for an existing programm. >> Hmm, i have never tested to load files in Final Cut Pro which i have=20 >> recorded with lavrec, but since it=C2=B4s MJPEG A it should work. >=20 > Yes, MJPEG will work. But if the scratches/dropouts are not in the > same place then cloning a fixed area from one place to another will > not work :( >=20 >> and i know ppl who have programming skills but no time for other=20 >> projects :-( >=20 > That seems to be a constant problem - the folks who can do the work > are too busy with other projects (or 'real work') >=20 >> Thanks so far, i=C2=B4ll play around with it and check the FCP filter.= >=20 > I'm not sure how much use it will be in this case. I have that > plugin and it's fairly good at covering over a logo which stays in the= > say place from frame to frame. I do not think it will be useful > with randomly moving lines :( > > If there are some scratch removal filters, perhaps from the GIMP, > available maybe they could be ported to a mjpegtools utility. That > is how y4munsharp was created - that program is essentially the > GIMP unsharp-mask plugin converted to a y4m utility. I=C2=B4ll play around with FCP a bit and compare the final results. Cheers, BF. > Cheers, > Steven Schultz >=20 |