DVDA3 wants to recompress mpg file?

jrazz wrote on 11/15/2005, 10:43 AM

I encoded all my video to mpeg 2 files in Vegas like always using the NTSC DVD Template. I have 2 other videos that have been encoded the same way on the same project. When I go to prepare my project it says "The video 'Haines reunion vid.mpg' on track 2 'Video' in 'Haines reunion vid' will be recompressed."
I am using 80 percent of the disc and the specs on that particular footage is 720x480x31, 29.970fps, 00:40:04:19, MPEG-2

What's going on here?
Thanks guys,
j razz

Comments

ScottW wrote on 11/15/2005, 11:02 AM

You should be using the DVD Architect NTSC video template, not just the NTSC template. Also the audio should be rendered as a seperate AC3 or WAV file.

Try going to the optimize section - sometimes DVDA will tell you what it doesn't like about the video.

--Scott

jrazz wrote on 11/15/2005, 11:11 AM

I tried going to optimize and changing the selection from recompress 'yes' to 'no' but it was greyed out. I have never used the DVD architect ntsc template and I have never had this problem. (the only reason I don't is I let it compress/encode the audio and video together). Is there an advantage to using that template? I have not ever had this issue before.
thanks,
j razz

ScottW wrote on 11/15/2005, 11:32 AM

DVDA does not want the audio encoded with the video because what happens then is it must, at the very least, demultiplex the audio stream from the video, reencode the audio as AC3 (or PCM) and then remultiplex the stream to create the files that go on the DVD.

You aren't saving any time by feeding DVDA a single file with both, and are more likely to encounter the type of problem you are currently seeing.

That's why you want to use the template for DVDA, because by default you will then do 2 seperate renders - one for the video and one for the audio. If you don't like doing 2 seperate renders, there are some batch scripts available that will do the 2 renders for you (go to the VASST website and search on batch or render).

--Scott

jrazz wrote on 11/15/2005, 11:35 AM

Thanks for the help... I will do the search on Vasst. I still don't understand why it wants to recompress the video though.
thanks,
j razz

rsp wrote on 11/15/2005, 11:40 AM

If you find an answer i would be interested to read it - thanks in advance

Rudi

dand9959 wrote on 11/15/2005, 12:34 PM

Bear in mind that the audio (ac3) render usually goes very quickly (compared to the mpg render).

jrazz wrote on 11/15/2005, 12:49 PM

Right, I don't have any qualms with alternate ways of doing things, I just don't understand why this video is not compliant as it was rendered in Vegas and why this video was selected out of 3 to be rerendered when there are 2 others in the same project that were rendered the same exact way.

j razz

nolonemo wrote on 11/15/2005, 2:43 PM

Importing a muxed AV stream rendered in Vegas doesn't explain why DVDA wants to re-render the *video* portion.

Last weekend I rendered some video in Vegas using the NTSC template by mistake (instead of the NTSC DVDA template) and while DVDA wanted to recompress the audio, it didn't indicate a problem with the video.

BTW, since I had rendered the audio to AC3 in Vegas as aways, simply replacing the mpg audio with the ac3 audio file in DVDA fixed the audio situation, the disc created without any rendering.

I'd compare properties of the three streams to see if you can see any point of difference....

jrazz wrote on 11/15/2005, 3:43 PM

There is absolutely no difference in the video streams properties besides the length. That is why I can't understand why it wants to rerender. I even tried restarting the program, restarting the computer and creating a new instance of it in DVDA3... no luck. I guess it will just have to be rerendered.

j razz

jrazz wrote on 11/15/2005, 4:43 PM

Okay, I went ahead and rendered and it looks okay. I went back into DVDA just to check one more time and now it has no problems with the file... is that due to smart prepare or does it now not have any problems with the file? Honestly, I can't complain, I have never had any major problems with DVDA that couldn't be solved, although I can be curious as to why this happened.

j razz