MF Version 3 - Dolby Digital Audio Tracks in Mpg file

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OneBigNewbie

MF Version 3 - Dolby Digital Audio Tracks in Mpg file

Post by OneBigNewbie »

I tried to burn a DVD using MovieFactoru Version 3 from an mpg file (which is a concert). The mpg file, according to MovieFactory (when I tried to import it to a project), contains Dolby Digital Audio Tracks, as indicated by the following error message from MovieFactory:

x1x1.mpg] contains Dolby Digital audio tracks.
DVD MovieFactory does not support this audio
format. Do you still want to insert this video clip?
Yes No

Here are my questions:
(a) Can I still go ahead with the import to create the DVD ?
(b) What are the repurcussions in importing files that MovieFactory
do not support in this case ?
(c) And if the import is not recommended, what do I need to change
(including use of software) to make the mpg file acceptable
to MovieFactory ?

I appreciate your reply.
DVDDoug
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Post by DVDDoug »

You can try checking the box that says Do not convert compliant MPEG files. That might allow the file to pass-through with the Dolby AC3 intact.

Or, you could upgrade to Movie Factory 5 which supports 2-channel AC3, or upgrade to Video Studio 10+, which supports 5.1 channel AC3.
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No time to think.
It's like the whole world's
Out of... sync.[/i]
- Head Over Heels, The Go-Gos.[/size]
OneBigNewbie

Post by OneBigNewbie »

Thanks, Doug.

Got a message after changing the settings as you suggested:
"There is a conflict between your project audio setting and Treat
MPEG Audio as non-DVD compliant option".

So, I do not think it may work.

I would consider upgrade to MF-5, but I would like to try MF-5 first.
Is there any limitations (in terms of features) on the trial version that I should be aware of ?
snoops
Posts: 325
Joined: Tue Mar 21, 2006 12:54 am
Location: Munich

Post by snoops »

Maybe somebody is mixing things up...

MF2 does not officially support Dolby, but it will pass through Dolby stereo audio input if the "Do not convert compliant..." option is selected. I had this version and was doing this before upgrading to MF3 Disc Creator.

MF3 (Disc Creator edition) supports Dolby Stereo.
Possibly your version doesn't.

MF5 (like MF3 Disc Creator and MF4) does not support Dolby 5.1, just Dolby stereo.

http://www.ulead.com/dmf/compare.htm
Henry
Bud Fox

Post by Bud Fox »

Henry,

I asked this question a week or so ago, and was told MF5 does have DD 5.1 capabilities. (Though I agree with you, the website doesn't make the claim, and if it could, I'm sure it would).

Assuming I use MSP 8 and that it is able to do 5.1, what do I need to be able to burn a file to a DVD (watchable in a home DVD player) that has 5.1? It seems no one is able or willing to say for sure.

Thanks,

Bud

p.s. I tried asking Ulead support but they refused to answer unless I purchased MF5 first. Well, that would be the only reason I would upgrade to MF5, so I'd be pretty stupid to pay for it, then ask support, only to have them tell me "no, it doesn't do 5.1."
snoops
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Location: Munich

MF5 Dolby 5.1 capabilities

Post by snoops »

Hi Bud,
and was told MF5 does have DD 5.1 capabilities. (Though I agree with you, the website doesn't make the claim, and if it could, I'm sure it would).
Well, if MF5 supported 5.1 encoding, they would show it... in big letters!

What I can say for sure about the MF5 trial version I tested:

The MF5 advanced options only show Dolby stereo, and the choice is greyed out (inactive). So 5.1 can't be chosen.

The Dolby 5.1 "capabilities" of MF5:
MF5 accepted 5.1 as input, but did not pass it through. I used a pre-encoded MPEG2 video file and added a 5.1 AC3 file as the audio for the clip. "Do not convert compliant..." option was checked. It converted the 5.1 to Dolby stereo, according to IFOedit. I didn't save or burn the folder from the test - but it confirmed the Dolby matrix at Ulead.

So if you want to burn 5.1 audio from MSP8 (or elsewhere), then you'll have to use the DVD authoring in MSP8, not MF5.

This is the Dolby support matrix:
http://www.ulead.com/spotlight/dolby/runme.htm
Henry
maddrummer3301
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Post by maddrummer3301 »

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Last edited by maddrummer3301 on Sat Feb 03, 2007 6:53 am, edited 1 time in total.
snoops
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Location: Munich

Post by snoops »

Hi,
Been importing Dolby 5.1 videos starting from MF3 and making dvd's without a problem.
Are you sure? Can you please check a DVD you made, if it really still has the 5.1 audio on it?
I didn't edit or change the video or add any transitions... and the video was not rerendered. But the 5.1 audio was replaced with stereo. The 5.1 audio preview worked by the way, which would be expected if they use a common DLL to decode.
Henry
maddrummer3301
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Joined: Fri Dec 10, 2004 10:24 pm
Location: US

Post by maddrummer3301 »

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Last edited by maddrummer3301 on Sat Feb 03, 2007 6:55 am, edited 1 time in total.
snoops
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Joined: Tue Mar 21, 2006 12:54 am
Location: Munich

Post by snoops »

MD,

Thanks for checking!

I'm gonna need some time to find out why MF3 (and MF5 trial) convert the 5.1 AC3 file to stereo... on my system. I demuxed the VOB and checked the audio track: it is stereo. The audio/video multiplexing zoomed through, just like when files are not re-encoded (I guess changing a flag in the Dolby input and outputting 2 tracks would cause no delays anyway).

The input was 5.1 48khz 448kbs in Motorola (not Intel) byte order. Maybe its a problem with big/little-endian Dolby byte order, maybe my AC3 file has something in it that Ulead doesn't like, maybe your Nero7 outputs 5.1 differently or sets certain flags, or maybe there is something else I've overlooked. I think this will be difficult :shock:
Henry
maddrummer3301
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Joined: Fri Dec 10, 2004 10:24 pm
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Post by maddrummer3301 »

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Last edited by maddrummer3301 on Sat Feb 03, 2007 6:57 am, edited 1 time in total.
snoops
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Location: Munich

Post by snoops »

Hi MD,
Intel stores the data in reverse byte order.
Yes, the Dolby specs require support for both byte orders.
The audio output by MF is not byte-swapped (that would be very very noticable). So maybe you're right, that it is just not recognized, and the later functions discover they already have the right format.

It's weekend... maybe I'll take a look into it. And discover something completely different, like a stupid mistake I made :roll:
Henry
snoops
Posts: 325
Joined: Tue Mar 21, 2006 12:54 am
Location: Munich

Post by snoops »

I tried to load an AC3 file with Intel byte order but MF says it contains no audio. Intel byte order plays fine in MediaPlayer, WinDVD etc., so MF is not adhering to the Dolby specs and only accepts Motorola.

This didn't help me find the reason for the conversion from 5.1 to stereo, but thought I'd mention it anyway.
Henry
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