[MEncoder-users] Deinterlacing problem

[Rich Felker]

On Thu, Jul 21, 2005 at 05:12:04PM +0200, Grzegorz Nowak wrote:
> Hello,
> 
> I have a problem with deinterlacing my dv video from my sony camera.
> The problem is, that when i use this code:
> 
> mencoder dvmov.avi -nosound -vf tfields=2 -ovc lavc -fps 50000/1001
> -ofps 50000/1001

WTF!? 50000/1001? I think yoy mead 50 if the video is PAL, or
60000/1001 if it's NTSC...

> The video bobs/flickers/jumps up and down, because of the even odd
> frame height problem. So the big question is, how can I avoid this
> flickering? Is it possible to deinterlace properly only using
> Mencoder?

Yes, and the above command line does it. However mode 4 is slightly
higher quality for tfields. If you're seeing flicker/jumping during
playback, it means the timing in your player is bad, or your refresh
rate is bad for watching 50fps video (it should be 100, ideally).

One way to reduce flicker and make the output video smoother is to use
denoise3d with high temporal denoising after tfields.

> Does Mencoder have an hidden antibob or smooth bob filter?

No, not at present.

> And maybe I can squize one more question, a bit out of topic but
> hey...... After I installed the new mplayer I can't open encoded files
> in virtualdub caused by the FMP4 format. Is it possible to encode with
> mencoder without using this format? I can't get it working even if I

-ffourcc and you can use whatever fourcc you like. But it would be
better to just fix whatever's wrong with vdub..

Rich