Re: [Dvdauthor-users] Spumux reports subtitles added but...

[Brad du P. <br...@ca...>]

Thanks for your help, I may just try hacking the stream myself instead of
using a multiplex program. As I see it, its a simple matter of finding each
pts and overwriting it with a pts that starts from zero.

Kind regards,
 Brad

----- Original Message ----- 
From: "Dave Chapman" <da...@dc...>
To: "Brad du Plessis" <br...@ca...>
Cc: <dvd...@li...>
Sent: Tuesday, June 29, 2004 11:41 AM
Subject: Re: [Dvdauthor-users] Spumux reports subtitles added but...


> Brad du Plessis wrote:
> > I'll try
> > remultiplexing though, can you point me to some documentation on an app
that
> > can remultiplex the file?
>
> I personally use replex:
>
> http://www.metzlerbros.org/dvb/
>
> but I know that this program has problems with some MPEG streams.  Maybe
> others can suggest alternatives.
>
> "mplex" from the mjpegtools is the recommended multiplexer for use with
> dvdauthor.  i.e.
>
> mplex -f 8 -o out.vob video.m2v audio.mp2
>
> But that requires a seperate "demultiplexer".
>
> I'm sure others on this list can help.
>
> > I agree that resetting the PTS values is the probably the best thing to
do
> > in light of the fact that only a very long video segment would overflow
an
> > int. I think I may see a problem though if a try and author an MPEG clip
> > from a recording in which the MPEG card itself has overflowed its 33bit
pts
> > register. I'll get a discontinuity in the pts values that would suddenly
go
> > from max unsigned 33bit integer back to 0. Not sure if spumux, dvdauthor
or
> > a dvd player would handle this, unlikely.
>
> This will be the responsibility of the (re)multiplexer.  If it converts
> the PTS values to start at zero, then it will not be a problem.
>
> When you demultiplex to two elementary streams (video and audio), these
> streams do not contain any PTS values.  So when the multiplexer puts
> them back together again, then it obviously just starts at zero.
>
> Dave.
>