[MPlayer-users] Bug in pullup and filmdint? (Uploaded samples)

[D Richard Felker III]

On Wed, Jun 09, 2004 at 01:58:40PM -0400, Jason Tackaberry wrote:
> On Wed, 2004-06-09 at 13:22 -0400, D Richard Felker III wrote:
> > AFAICT the flags are still there, so that's not the problem. However,
> 
> It's just that when I play from the DVD, mplayer outputs "demux_mpg:
> 24fps progressive NTSC content detected, switching framerate" but it
> doesn't say that when I play back the AVI I made with -ovc copy.  So I
> assumed it ditched those flags when it got put into an AVI.  Maybe not.
> 
> > the FPS is bogus because you stored the output in avi with -ofps
> > 23.976. This is causing mencoder's a/v sync code to mess up during the
> > following two encodes.
> 
> I wasn't quite sure how best to do this.

AFAIK there is no corrrect way to do this... AVI sucks too much.

> Without specifying -ofps,
> mencoder duplicates every 4th frame because the AVI is supposed to be
> 29.97.  The result is that without -ofps 23.976, IAS_clip_dvd.avi would
> have been jerky.

Yes, that's wrong too...

> Now, when I run filmdint on the jerky version of IAS_clip_dvd.avi, the
> output looks fine, because then it removes every 5th frame that mencoder
> added.
> 
> When I take the clip from the DVD with -ovc copy -ofps 23.976 and
> transcode using pullup/filmdint from that, I get the same results as
> transcoding directly from the DVD.

I don't think so. I tried using filmdint with mencoder and I was
getting lots of skipped frames. But filmdint itself was doing
correctly. So the problem is the broken framerate from copying into
avi.

> > Aside from this, filmdint seems to be working perfect. But pullup is
> > doing something really weird and I can't seem to figure out why...
> 
> We must be looking at different files.  Did you transcode with -vf
> filmdint yourself, or look at the IAS_clip_filmdint.avi file I uploaded?
> The file I uploaded clearly has missing frames (the first 60 frames
> seems to be missing about 3 frames), causing the panning to look jerky.
> (Though it's not quite as chaotic as pullup.)

Yes, I told you: this problem is from the framerate being broken. It's
mencoder, not filmdint, dropping the frames. It will do exactly right
when just _playing_ the file (with mplayer) or when encoding from the
DVD where the framerate is right.

Rich