VEGAS Pro Forum
Rendering problem, please verify
Rendering problem, please verify
by Randal Petryshyn on Feb 18, 2011 at 7:12:56 pm

I am having VBR adjustment problems with 10cPro. Is it just me? vegas 4, 8, 9, all adhere to the manual input for VBR for mpg2. 10cPro does not render out the average bitrate accurately which results in too large a file size. I have been calculating and adjusting VBR for DVD5 since ver4 and never had a problem. Can someone please verify this problem.....

Mainconcept says its Sony's front end to their encoder engine, therefore they can't give support.
Sony support doesn't seem to understand what the "Average Bitrate" concept in VBR means.

Please help, as Vegas10 is useless to me if I can't "render to size" as I have done in the past....


Re: Rendering problem, please verify
by John Rofrano on Feb 18, 2011 at 7:17:19 pm

It may actually be a bug. I know there was problems with MPEG2 not smart rendering. Did you report this to Sony? If not, you should and I'm sure they will want to fix it.

~jr

www.johnrofrano.com
www.vasst.com


Re: Rendering problem, please verify
by Mike Kujbida on Feb 18, 2011 at 7:46:45 pm

I agree with John that it is a bug so please report it.
A user on the Sony Vegas forum reported exactly the same problem a few days ago.
He did 4 identical renders of the same project and got file sizes of 3.9GB, 3.92GB, 4.35GB, & 4.40GB.
His solution was to go back to Pro 9 :(


Re: Rendering problem, please verify
by Randal Petryshyn on Feb 19, 2011 at 3:30:55 am

Hi
I have reported this to Sony Support. Their last reply was:

"In the meantime, I would suggest that you try adjusting the bit rate
until you can fit your footage onto a DVD"

With 6 - 8 hour renders, that a gamble I don't have time for....

I'm stuck!


Re: Rendering problem, please verify
by Randal Petryshyn on Feb 19, 2011 at 3:33:50 am

It sure would be nice to have a "Fit to Disk" script ;)


Re: Rendering problem, please verify
by Stephen Mann on Feb 19, 2011 at 4:47:31 am

Predicting the bitrate to fit the DVD before encoding is not possible. You can guess but you can't tell how much the encoder will need to compress the video without... encoding.

Steve Mann

Steve Mann
MannMade Digital Video
www.mmdv.com


Re: Rendering problem, please verify
by John Rofrano on Feb 19, 2011 at 3:30:46 pm

[Randal Petryshyn] "It sure would be nice to have a "Fit to Disk" script ;)"
DVD Architect already does this. Just render to AVI or M2T and drop in DVD Architect and it will fit to disc automatically. No guesswork.

~jr

www.johnrofrano.com
www.vasst.com


Re: Rendering problem, please verify
by Randal Petryshyn on Feb 19, 2011 at 6:22:52 pm

Thats the problem John. Having to render it twice takes way too much time. Thats why having "Fit to Disk" within Vegas would be great. Even having VBR listen to manual settings as "previous versions" do, will suffice, but it still requires calculation. A "fit to disk" function that integrates with the "render regions script" would be highly desirable.


Re: Rendering problem, please verify
by John Rofrano on Feb 20, 2011 at 5:13:35 pm

[Randal Petryshyn] "A "fit to disk" function that integrates with the "render regions script" would be highly desirable."
Agreed, but that's what bit-rate calculators do. The VASST Ultimate S Pro plug-in has a bit-rate calculator built into the DVD tab but there are plenty of free ones on the internet. The problem with adding it to a script is that there is no way to programatically change the bit-rate when rendering so you would always have to go into the template and change it yourself. I agree it would be nice to have it done automatically.

~jr

www.johnrofrano.com
www.vasst.com





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