[MEncoder-users] [BUG] a-v sync problems with pullup, softskip (only on some DVDs)

[D Richard Felker III]

On Wed, Mar 16, 2005 at 07:57:20PM -0800, RC wrote:
> On Wed, 16 Mar 2005 18:13:15 -0800
> Corey Hickey <bugfood-ml at fatooh.org> wrote:
> 
> > but can anything be done about 
> > the amount of frames that get duplicated? V
> 
> > As you can see from these examples, mencoder duplicates lots more frames 
> > when using pullup:
> 
> :-)
> 
> Duplicate frames are a GOOD THING.

No they're not.

> In this case, it means pullup is doing a good job of reversing the
> telecine, so subsuquent frames are identical, rather than broken.

Nope, it means pullup is failing to get enough good frames to output.
This means either it's deficient in finding them, or the input file is
horribly broken.

> If you encode interlaced material without deinterlacing it, you
> won't see one "duplicate frame" message. If you properly deinterlace
> the interlaced material, then you'll start to see duplicate frames.

No, only if you use the wrong output framerate. (Also a few additional
duplications will creep in at scene-changes, but not nearly this many!)

Rich