Re: [Encode2mpeg-users] encoding for the Philips DVP642

[Giacomo C. <enc...@us...>]

On Fri, Nov 11, 2005 at 10:34:18PM -0800, Adam Monsen wrote:
> On 11/9/05, Giacomo Comes <enc...@us...> wrote:
> [...]
> 
> > The pixelation at the beginning is something I'm aware, but I have not
> > figured yet how to avoid it. Usually the fade in at the start of the movie
> > makes the problem irrelevant, but if the video begin with full action then
> > you can see it.
> >
> > The audio drift is not codec related so I have to think to other causes.
> >
> > I have a good news for you. I got a dvp642, so very soon encode2mpeg will
> > make good avi's for that player.
> 
> 
> Ah, cool. :) Hope you like the player. It's pretty tricky to test all these
> things!
> 
> In the mean time I can tell you that all combinations of -encode n:m:i
> > should be playable (well, I have not tested pcm audio) and the option
> > -ffourcc DIVX is not necessary.
> 
> 
> Ok.
> 
> What is important is the usage of -setaspect and that the video resolution
> > is 720x576 or less. But I have noticed some distortion if the resolution is
> > higher than 640x480, so 640x480 should not be exceed.
> 
> 
> Agreed.
> 
> Be patient another couple of weeks and the sync problem should hopefully
> > disappear :-).
> 
> 
> Heh, ok.
> 
> In the mean time I can suggest you another 2 tests:
> >
> > 1) add the option -vfr with the value corresponding to your source
> > video. It should be -vfr 3 for PAL and -vfr 1 or -vfr 4 for NTSC. If the
> > argument of -vfr is not the correct one, you will see constantly repeated
> > the message:
> > Skipping frame!
> > or
> > 1 duplicate frame(s)!
> > during the encoding. With the good -vfr n option no such messages
> > should appear except may be a couple of times at the beginning.
> 
> 
> Ok.
> 
> 2) Instead of making a local copy of the dvd with mencoder, encode
> > directly from the dvd source: encode2mpeg -avionly -encode 4:2:1
> > -setaspect 3 -vbitrate 2000 dvd://1 -o tests_enc221 -vfr n
> 
> 
> Ok, cool. I was wondering if that would make a difference.
> 
> you could also let encode2mpeg make a copy of your source with the option
> > -cache (encode2mpeg -doc cache.html), but this is not related to the audio
> > desync.
> >
> > Check if also these two encodings show the audio drift. (by the way, are
> > you sure that your source dvd is ok?
> 
> 
> Ya, pretty sure... the DVD plays fine on it's own, but that's a good point.
> I've been using one video (and not encoding direct from DVD, like you
> recommended).
> 
> have you observed the audio drift also encoding from another source?)
> 
> 
> Not sure... I'll have to double-check.

I have some updates.

I was able to reproduce the audio desync. So it is not related to your
particular DVD nor to the fact that you copied it to the disk with
mencoder.

It should not take a lot to figure how to avoid desync.

There are some other issues that I need to check too.
But it looks promising.

Stay tuned.

Giacomo