Re: Combining video+audio clips ?


"Frank" <frank@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:udq5e35e9t889c3b6fmareq79n2fg9344j@xxxxxxxxxx
On Sat, 08 Sep 2007 08:59:11 +0100, in 'rec.video.desktop',
in article <Re: Combining video+audio clips ?>,
Martin Heffels <goofie@xxxxxxxxxxx> wrote:

On Fri, 07 Sep 2007 23:30:33 -0400, Frank
<frank@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

All what Frank said, except....

Have you looked at these files in a hex editor program to determine
whether or not they're really Apple QuickTime .mov files?

Use G-spot. Much easier to understand than a bunch of hex ;-)
http://www.headbands.com/gspot/

Agreed ( although us old programmers actually *like* "a bunch of hex"
:) ), and although GSpot is really designed to examine .avi files, it
will display information about .mov files. I just tried an
AVC/AAC-encoded .mov, for example, and it gave me fairly complete
information. It doesn't determine codec status, however, probably
because it lacks code to determine which QuickTime compatible codecs
are installed on the system.

Apple, however, offers an old program called Dumpster that will
display the internal structure of a .mov file. I would think that if
the files that the OP is trying to play (that the QuickTime Player
program "doesn't recognize as videos") are not really .mov files, the
Dumpster program would also complain. OTOH, if they really are valid
.mov files, then Dumpster should display their structure.

The Windows version of the Dumpster program can be downloaded for free
via the following link.


ftp://ftp.apple.com/developer/Quicktime/Windows_Tools/Programmers_Tools/Dump
ster/Dumpster.zip

Just for the record, Microsoft offers a similar free program for .asf,
.dvr-ms, .wm, .wma, and .wmv files called Windows Media ASF View 9
Series (asfview.exe). Information about the program, as well as a link
to download it, can be found at the following URL.


http://www.microsoft.com/windows/windowsmedia/forpros/format/asfviewer.aspx

--
Frank, Independent Consultant, New York, NY

Thank you Frank and Martin for your help.

Win2K has SP4 + Rollup installed

I used GSpot, as you suggested, and it indicated the files as MPEG-2 video
and AC3 audio but that the AC3 codec was not installed. So you were right
Frank. That was the reason for no audio...... but why is it that I can hear
the audio in the individual files but not when I combine them? VLC and
other progs play both audio and video in the individual clips.

Apple products don't concern me too much; it just happened that I had
Quicktime installed. I'm sure there are many more progs for windoze. I have
many video players already.

I had AC3 running on an earlier Win2K installation but, although I have a
lot of AC3 files, I don't see the codec. I have AC3 filter, AC3 ACM but no
trace of anything called codec.
It would appear that the AC3 is the problem.

I have dnloaded VDubMod Mpeg but have not used it yet. Will try soon.

Thanks again and I hope you're enjoying the weekend :-)

RF



.

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