Re: [Encode2mpeg-users] DVP642 A/V sync problem with ac3 5.1 audio

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

On Fri, Feb 08, 2008 at 12:09:15PM -0600, JohnG wrote:
> On Mon, 16 Oct 2006 12:05:00 -0400, Giacomo Comes wrote:
> 
>  > I have found what seems to me a problem with avi created by mencoder
>  > containing ac3 audio and the Philips DVP 642 dvd player.
>  >
>  > Consider the file
>  > 
> "http://n.ethz.ch/student/fhoesli/video/Feature-Test-DivX.Certified-Only.('20th').avi"
>  >
>  > It has mpeg-4 video and ac3 audio. The file plays fine on the Philips
>  > DVP 642. (using ac3 spdif)
>  > Now I just make a new avi using mencoder with:
>  >
>  > mencoder -ovc copy -o test.avi
>  > "Feature-Test-DivX.Certified-Only.('20th').avi" -oac copy
>  >
>  > The file test.avi plays on the DVP642, but if I use ac3 spdif the audio
>  > and video are out of sync of 1-2 seconds.
> <snip>
>  >
>  > Giacomo
> 
> I believe I have found an explanation, and that -oac copy is the cause.
> Using: MEncoder 2:1.0~rc1-0ubuntu9.2 (C) 2000-2006 MPlayer Team
> 
> I recently got a newer DVD Player(Samsung 1080P7) and it will not play ANY
> avi created with -oac copy as above.  The audio comes out in chirps and
> the video in jerks at about 5 second intervals.
> 
> The Player has a digital counter.  During play, the counter sequences up
> to 5 and then returns to 2.  Next it runs up to 6 and then returns to 2
> again.  This pattern repeats 2-6, 2-7, 2-8, 2-9, etc.  Eventually the
> counter returns to 3 and the pattern begins with 3-n.
> 
> Is it possible that the avi is not interleaved correctly and therefore is
> unplayable on CD/DVD media?
> 
> John

I have seen that mencoder's avi muxer has more than one problem.
You can try to use the libavformat muxer and see what kind of
results you have. Add to your command line the option "-lavf".

Keep in mind the following when using -lavf:
- encode2mpeg 0.6.4 works ONLY with MPlayer1.0rc1
- do not use bframes if you encode the video (add -bframes 0)
- the option -noodml does not work (do not exceed 1GB file size)

The avi made using -lavf should play without desync on the DVP 642.
Check about the Samsung.

Let me know the results.

Giacomo