[ExtractStream] Re: Audio Synchronisation - Does Anyone have the Answers ?

[Don Starr]

How does one get VirtualDub to accept MPEG2 files? In attempting to
load my .m2v file, I see "VirtualDub cannot decode MPEG-2 video
streams".

Is that what you meant by "uncompressed mode" (i.e. get away from
MPEG-2 first) ? If so, do you have a suggestion for a tool to do
this? I'm really trying to avoid transcoding (or decoding, editing,
re-encoding). Going back and forth between lossy compression formats
doesn't seem like the right way to archive video.

-----Original Message-----
From: Michael Loftis [mailto:mloftis@w...]
Sent:	Wednesday, May 29, 2002 7:54 PM
To:	ExtractStream@yahoogroups.com
Subject:	Re: [ExtractStream] Re: Audio Synchronisation - Does Anyone
have the Answers ?

I use virtualdub, it allows you to adjust in msec increments the
offset
from which the audio starts. I imagine you could use it in
"uncompressed" mode to get the streams into sync, then feed that into
TMPGEnc? Dunno. I don't do the DVD thing yet.

Don Starr wrote:

>Correction: the name of the MPA file generated by DVD2AVI is "show
MPA
>T01 DELAY 0ms.mpa".
>
>It is also identical to the M2A file generated by the vsplit embedded
>in Tivo Client, which tells me that I can eliminate my steps 2 and 3
>below, instead using TMPGEnc's NTSC DVD wizard to generate a 720x480
>MPG from the original m2v and m2a.
>
>That still leaves me with the big audio offset, however.
>
>
> -----Original Message-----
>From: donstarr [mailto:don@s...]
>Sent:	Wednesday, May 29, 2002 7:39 PM
>To:	ExtractStream@yahoogroups.com
>Subject:	[ExtractStream] Re: Audio Synchronisation - Does Anyone have
>the Answers ?
>
>Here are my steps, similar to Mark's yet I'm getting monstrous audio
>offsets:
>
>1. Use the new Tivo Client and tserver_mfs (from the 27 May 2002
>version of tytool2.zip) to extract and split (e.g. yielding show.m2v
>and show.m2a).
>2. TMPGEnc -> MPEG Tools -> Simple mux to generate show.mpg from the
>m2v and m2a files.
>(playing this mpg in PowerDVD exhibits the audio offsets)
>3. Use DVD2AVI to generate show.d2v and show.mpa from show.mpg
>4. TMPGEnc wizard (DVD NTSC) to generate show_dvd.mpg from show.d2v
>and show.mpa
>
>The resulting show_dvd.mpg is still exhibiting ~150ms (guess, by
>observation) audio offset, in both PowerDVD and WMP. The split
>operation in Tivo Client told me that the audio was 7 ms early.
>
>Do I have extra steps in there (i.e. muxing to the first MPEG, then
>generating the NTSC DVD MPEG in DVD2AV)? Am I totally missing some
>setting or option in one of these that would give me the audio
>offsets?
>
>-Don
>
>
>
>
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>
>
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>



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