Re: Problems with dvdauthor - please help.

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Date: Tue, 28 Dec 2004 00:58:39 -0500

Hi all,

    It looks like the video I was trying to write to a DVD did not have
some information in it required by dvdauthor. I looked at the man page
for "mpeg2enc" and the "-f" option states the following:

-f|--format 8
- DVD MPEG-2 for 'dvdauthor'
This version adds special dummy navigation packets into the output
stream that the dvdauthor tool fills in to make a proper .VOB for
authoring. Bit-rate defaults to 7500kbps, buffer sizes to the maximum
permitted by the DVD specification.

This is what was missing in my mpeg file.

I used the "tovid" tool to properly convert my mpeg and it worked! I was
able to successfully get qdvdauthor to make a dvd for me. (mind you,
there were some other big bugs in the qdvdauthor tool that I figured out
how to avoid. :))

However, there was a big drop in quality from the original MPEG video
using "tovid". It reads the mpeg and modifies it. I'm sure I could
optimize all of the settings for mpeg2enc but there are so many and I
know very little about mpeg files.

What I'd like to know is what the "special dummy navigation packets" in
the mpeg file are? If I knew this, I could add them myself without
having to re-process the mpeg file again (and decrease the video quality).

Thanks!
George

P.S. Thank you noi, Wiseguy, and Peter for your help! I really
appreciate it! :)

Peter Shaggy Haywood wrote:
> Groovy hepcat George was jivin' on Tue, 21 Dec 2004 17:36:53 -0500 in
> comp.os.linux.setup.
> Problems with dvdauthor - please help.'s a cool scene! Dig it!
>
>
>> Has anyone been able to author DVD's in Linux? I've been trying to
>>do it for quite some time and am on the verge of giving up! :(
>
>
> I've been doing it successfully without too many problems.
>
>
>>I have an MPEG2 video I'd like to burn onto a DVD and have this video
>>divided up into "chapters" and perhaps even a menu, but the menu isn't
>>as important.
>>
>>I have bee able to successfully make a DVD with KLVEmkdvd. However, it
>>is one huge track. i.e. I can't jump to different sections of the video
>>without having to scan through it from the beginning.
>>
>>I tried qdvdauther, which uses dvdauthor, but it fails. The last thing
>>qdvdauthor does is execute the following:
>>
>>/usr/bin/dvdauthor -x "/home/george/tmp/GCFirstDVD/dvdauthor.xml"
>>
>>After that, I see the following:
>>
>>DVDAuthor::dvdauthor, version 0.6.10.
>>Build options: gnugetopt magick iconv freetype fribidi
>>Send bugs to <dvdauthor-users@lists.sourceforge.net>
>>
>>INFO: Locale=en_US
>>INFO: Converting filenames to ISO-8859-1
>>INFO: dvdauthor creating VTS
>>STAT: Picking VTS 01
>>
>>STAT: Processing /home/george/CC605_apple_ii_forever.mpg...
>>WARN: System header found, but PCI/DSI information is not where expected
>> (make sure your system header is 18 bytes!)
>>WARN: Skipping sector, waiting for first VOBU...
>>WARN: Skipping sector, waiting for first VOBU...
>>WARN: Skipping sector, waiting for first VOBU...
>>WARN: Skipping sector, waiting for first VOBU...
>
>
> Looks like your MPEG file is not DVD compliant or is corrupt or
> something. How are you encoding it? Are you using transcode for this?
> What is the exact command line you're using?
>
>
>>The warning "WARN: Skipping sector, waiting for first VOBU..." is then
>>repeated for a long time until. eventually, a segmentation fault occurs.
>>It looks as though there is something wrong with some header information
>>in the mpeg video. What is the 18 bytes of header information supposed
>>to be (as mentioned in the warning)? Why doesn't KLVEmkdvd, or any other
>>media players I use complain about this header information in the video?
>
>
> Perhaps KLVEmkdvd reencodes the video or something. Or perhaps it
> simply is more relaxed about DVD compliance or is more forgiving about
> corrupt video files. I haven't used it, so I don't know.
>
>
>>Here is information about the software I'm using:
>>Linux version: Mandrake Linux 10.1 (Official)
>>dvdauthor: version 0.6.10
>>qdvdauthor: version 0.0.8-1
>
>
> You need to tell us what you're using to encode the video. That's
> where the problem lies, not in dvdauthor.
>

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• In reply to: Peter : "Re: Problems with dvdauthor - please help."
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