PDA

View Full Version : DVSD --> deinterlace --> XviD(or DivX)


TVT
9th September 2007, 17:02
Hi!

Recently I tried to make DVSD-->XviD recompress using AviSynth+VirtualDub and I ran into very difficult problem with deinterlacing source DV stream (http://depositfiles.com/files/1660638). Output AVI-stream (http://depositfiles.com/files/1660681) seems to be deinterlaced right but object motions look very unpleasant and sharp. At the same time Microsoft Media Player plays the source stream (http://depositfiles.com/files/1660638) without any problem.

I've started this thread (click here) (http://forum.doom9.org/showthread.php?p=1040975#post1040975) in DV forum but nobody really could help me. I also was recommended to try AviSynth usage forum. Please woukd you read that post (http://forum.doom9.org/showthread.php?p=1040975#post1040975) carefully and give me advice or even explain me how I can (or why I cannot) to perform deinterlacing correctly to have 25fps with smooth motion of objects in resulting stream?

Thanks a lot in advance.

foxyshadis
10th September 2007, 01:33
It's just a case of garbage in, garbage out. Deinterlacers can't fix that problem, that's not what they do. You have to deinterlace and then tackle the junk your camera spews.

Dehalo_alpha can fix most of the dark edges an a few of the light ones, though most of the light are just too hueg to do much for. Softens up the picture a bit though. But the most important place to fix this is at the source. If your camera has any kind of "sharpen" or "sharp recording" option, turn it off.

For a denoiser, I don't know, fft3d will help, or frfun7, mvdegrain (slow), vaguedenoiser, the noise isn't horrible but you have to accept that the quality of your camera somewhat limits what you can expect.

You don't really have to deinterlace, you could leave it interlaced and let ATI/nvidia deal with the deinterlacing (at 50fps! looks smoother) on playback, or ffdshow if you have an old graphics card. You could play it unmodified on TVs with perfect smoothness, too. I'd probably just bob it in avisynth keep it at 50fps in that case, since I don't use crt tvs; there's no reason that's impossible, aside from needing 1.6x the bitrate of 25fps. (Interlaced is about 1.4x.)