Why does VS 11 always multiplex AV during final rendering

[perfection]

I edit home video and output a DVD compliant mpeg with smart rendering
Then i pull it back into the project to crerate DVD (Yes - I know i can import VSP fies direct to create a DVD)
When i finish the menu authoring part i choose to output the same as DVD folders - THIS TAKES ALOT OF TIME AND BELIEVE THE AIDIO AND VIDEO IS GETING RE-RENDERED (though i have chosen not to in my project preferences) and moreover it should not be as the mpeg has already been made dvd compliantr from the same program.

But i do notice audio and video multiplexing in the final rendering. Should this happen though i have chosen to smart render a DVD compliant file?

[Clevo]

Select the option "Do not render mpeg compliant video...".

You are following the recommended work flow.

[Ken Berry]

Multiplexing is by now means the same as rendering. In effect, multiplexing is ensuring that the audio and video parts of the mpeg-2 used on a DVD are properly synchronised. It is an unavoidable and essential part of the production of a DVD or iso disc image or DVD folder. Unlike the internet environment where audio and video can be delivered separately using different sockets, both the optical disc and broadcast environments use a single stream of information (bytes) over which both audio and video (and all other information) are delivered. Further constraints are present because optical disks (CD or DVD) are constant speed devices while audio or video information may be variable rate.

As Clevo has already indicated, the workflow you describe is in fact our recommended one. But if you are indeed following it, yet the entire burning process is taking a "lot of time", then something may indeed be going wrong. Usually I do the same as you and produce a DVD folder of each of my projects, rather than directly burning to DVD. For a one hour, high quality project being 'burned' to a 4.3 GB DVD folder on the computer whose specifications you will find in my system button, will usually take not much more than 30 minutes and rarely more than 35. I don't know how this compares to your 'lot of time'...

However, the only conversion or rendering of video that should occur during this process is the conversion of new menu to video. Then should come the multiplexing and then the actually 'burn' of the folder or actual disc.

If the mpeg-2 you first convert your project to is indeed DVD-compliant, it will not need converting again. However, often the default project settings contained in the upper window when you click on the middle of the three icons in the bottom left of the burning screen may be different from the properties you used in producing your mpeg-2. To prevent a second conversion i.e. converting your already compliant mpeg-2 to those new properties in that window, you will see directly below it a little box saying 'Do not convert compliant mpeg files'. That box MUST be ticked, and if it is, then a second conversion will not take place during the burning process. Just the multiplexing!

[perfection]

What you are trying to say is that EVEN IF CO NOT RENDER MPEG COMPLIANT FILES IS CHECKED MULTIPLEXING WILL OCCUR AND CANNOT BE AVOIDED

BUT IS MULTIPLEXING NOT RENDERING TOO? BUT ULEAD FEELS THAT IT IS BETTER FOR THE FINAL PRODUCT

TELL ME WOULD IT MAKE FOR SENSE (AND SPEEDIER) IF I IMPORTED THE VSP PROJECT INSTEAD AND DID THE WHOLE THING (INCLUDING BURN TO DVD FOLDER) IN ONE GO?

[Ken Berry]

Please try to avoid using all upper case letters -- in netiquette terms, it is considering SHOUTING!!

It is not that Ulead considers multiplexing is better for the final product -- multiplexing is an essential and unavoidable part of the production of *any* video produced by *any* video authoring program and aimed at being burned to a DVD.

Yes, you can certainly try doing it all in one go, using the .vsp file. Quite a few users do exactly that all the time successfully. But quite a few other users try it an often run into problems. It is just that the conversion/rendering of the project into mpeg-2 is in itself an extrememly complex and demanding task, and you are just lumping it together with the other demanding and complex tasks of conversion of the menu, multiplexing and production of the final product, and expecting your computer to do it all happily together, on the fly. For some computers, this is just a bridge too far... and they fall over or else the end result gets garbled in parts or the video and audio get out of sync. That is why we recommend the conversion be done as a separate step before the burning module is even opened.

As for saving time, you don't. The project still has to be rendered into DVD compatible mpeg-2, and this will take exactly the same time whether done as a separate step or part of the burning process. And the time taken in the burning module to convert the menu, multiplex and produce the final product will also take the same time regardless.

The only time you save in going straight to the burning module with your vsp file are the few seconds it takes (if you use our recommended method) to save and close your project after producing the mpeg-2, and open a new project so as to clear the timeline. And in the general scheme of a lengthy editing process, those few seconds are quite meaningless, particular if they can guarantee a greater chance of a successful burn.

[perfection]

Thanks a lot and sorry for "shouting"
My 48 min movie took around 25 minutes or so to write to a DVD folder with 'do not render mpeg compliant files' checked So i think that kind of tallies with what you mentioned and hence i hould not call it a long time anymore