[MEncoder-users] Newbie struggling with pullup

[Scott Larson]

On Thu, 2008-02-28 at 08:12 -0600, Laine Lee wrote:
> I think. I have high hopes for decimate,
> because for passages where I've been able to target the right frames with
> it, the results have been near perfect. It's a bit more difficult to set the
> decimate arguments than I expected, however, because although I can easily
> make the distinction between frames I want to drop and those I want to keep
> when viewing frame by frame, my arguments for decimate seem to result in
> some very similar frames being kept.

If none of the good suggestions work out for you, there's still one more
method I've found that works with 720p material, especially stuff that
has crazy 2:2:3:3 combinations or is causing distracting interlaced
frames to slip through. I've found that for some reason "detc=2" (with
softskip) sometimes does a great job of locking onto the pattern of
duplicates. It doesn't actually remove the duplicated frames so you'll
see "skipping frame" messages continuously during the encode but these
are the frames that should be skipped. You can pipe stderr to /dev/null
if the messages are bothersome.

I've even used this on material that had drop outs and other corruption
that broke every other method I use and somehow old detc was able to get
back on the pattern in less than a second. Of course I don't know why
this works because detc wasn't designed for this purpose so I can only
shrug and tell you to try it if nothing else works.