[MEncoder-users] Weird DVD with shifting framerates

[Andrew Udvare]

On Sun, Jun 09, 2013 at 02:39:50PM +0000, Carl Eugen Hoyos wrote:
> Andrew Udvare <audvare <at> gmail.com> writes:
> 
> > I very much suspected what you mention but the company
> > had to do something different mastering the 4th disc in 
> > this DVD set because that disc is only usable in 
> > encoded form seemingly at 29.970 FPS and so I used 
> > yadif with no options on that. That kept everything
> > looking good and audio synced.
> 
> yadif cannot know if the input is telecined or interlaced, 
> if you use it on telecined material, the output is 
> permanently damaged (you cannot get back the original 
> picture quality that you get with a perfrect inverse 
> telecine procedure).

The input source from the DVD was 29.970 that clearly had a 2:3 pull-down from 24 FPS but every time I attempted an IVTC with standard methods in mencoder, the audio would always be out of sync.

By the way, I used these options with ffmpeg as on the site examplle: fieldmatch=order=tff:combmatch=full, yadif=deint=interlaced, decimate for the other discs to get IVTC'd material. While it took considerably longer to encode, the quality looks excellent and the audio stays on sync. I will consider re-doing the disc 4 content to see if it does the same. Thanks for the help

> 
> Carl Eugen
> 
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