Why is DVDA re-rendering?

CClub wrote on 11/3/2006, 5:23 AM

I rendered an mpeg-2 file to be used in DVDA. I changed the default DVDA NTSC Video Stream from Custom Template to: Video Rendering Quality: Best, Two-pass VBR, and Video Quality to 31. Would this automatically make DVDA re-render the file?

Comments

Former user wrote on 11/3/2006, 5:44 AM

DVDA will re-render if it determines that the material will not fit on disk because of length/bitrate.

Or it will rerender if the format is not correct, either audio or video.

Do you know what bitrate you are using and how long the program is?

Dave T2

CClub wrote on 11/3/2006, 6:16 AM

It's only a 30 minute concert sampling, and I changed the default bitrate from 8 to 9.8. Would that do it? RE the "format" issue, I used the DVDA NTSC setting but made the changes to the template that I listed above.

gordyboy wrote on 11/3/2006, 6:20 AM

Or it will re-render if the DVDA project properties don't match those of the Vegas project properties eg your Vegas project was a PAL project and DVDA project properties are set to NTSC or any number of other combinations of mismatched video/audio streams.

Worth checking just in case.

gb

ScottW wrote on 11/3/2006, 6:36 AM

Don't use the default template. If you need to make a change to a template, start with one of the DVDA templates as a base and make changes to it.

I don't remember what offhand, but something changed in the default template with V7 that causes DVDA to think that it needs to re-render the video.

--Scott

Tinle wrote on 11/3/2006, 6:51 AM

"It's only a 30 minute concert sampling, and I changed the default bitrate from 8 to 9.8. Would that do it? "

Maximum bit rate for a DVD format is 10.08 Mbps. That rate is for video & audio combined. If you encoded at 9.8 Mbps for the video, you would have only 0.28 Mbps for audio. That's not much left to accomodate the audio.

Perhaps in the process of rendering out the separate audio & video files for use in DVDA, the combined maximum total rate limit of 10.08 Mbps is violated - causing DVDA later to re-render, in order to be DVD disc compliant.

bStro wrote on 11/3/2006, 7:46 AM

Besides which, even if DVDA would allow a disc to be burned with such a high bitrate, many DVD players would have trouble playing it. DVDs on burned media really shouldn't be any higher than 8Mb/sec.

Rob