DVD Project File Size

HGPilot wrote on 7/23/2006, 5:18 AM

I'm still pretty new to the Vegas and DVD Architect products, but I am learning so much from these forums and have found answers to most of my questions thus far. But I can't figure this one out...please advide.

I have a single rendered MPG2 file from Sony Vegas...it contains all video and sound and is 4.4GB. When I fire up Architect and create my DVD project, I add this single file to my DVD Menu and nothing else (in other words, no additional menu pictures, chapters, music, etc). When I prepare the project, I get a message that my project is too big (15% over the 4.7GB capacity of my media). Also tried this again with another project where the single media was 4.1GB (this one was 4% over). I was unable to "compress to fit"...but here's my question. Why is DVD Architect unable to fit a 4.4 GB file onto a 4.7GB disk? I also have Roxio 8.0, and I was able to successfully burn my 4.4GB file to a DVD - worked perfectly. Any ideas / suggestions / insight? Thanks in advance.

Comments

johnmeyer wrote on 7/23/2006, 8:33 AM

The estimates in DVDA are completely bogus. Ignore them.

bakerbud9 wrote on 7/23/2006, 9:17 AM

You mentioned that your single MPEG-2 file has video and sound. I believe DVD Architect requires that the video and audio be in separate files, otherwise it may need to recompress the audio track. This might be a source of the problem.

ScottW wrote on 7/23/2006, 9:21 AM

I agree with John that the estimates DVDA makes are questionable - but, as you are rendering to an MPEG with audio and video, they may be accurate in your case.

The real question is are you using DVDA or DVDAS? In either case, the software is going to extract the audio from the MPEG-2 file and either re-encode it as AC3 (if you have DVDA) or PCM (with DVDAS); PCM audio is going to be larger than the audio that's likely encoded in your MPEG file, so that may be where the size difference is coming from.

If you are using Vegas/DVDA (not the movie studio version), you should render your video and audio to seperate files; video using the appropriate DVD Arch template, audio as AC3. Then DVDA will do pretty good with size estimates.

You should also consider using a bitrate calculator to make sure you can fit your material on the DVD - if you google "bitrate calculator" the first link is to a good calculator.

--Scott

R0cky wrote on 7/24/2006, 1:48 PM

Another factor to consider is "what is a Gigabyte" - is it 1024^3 or 1000^3?

Your 4.7 GB disk is more like 4.4 GB when a GByte is 1024^3.

I have to re-figure this out all of the time for the particular application I'm using. Sometimes it's worse ie a GByte is 1024*1024*1000 in some apps. Then you get 4.5 GBytes on a disk.

Rocky

johnmeyer wrote on 7/25/2006, 6:46 AM

	                  Bytes           KBytes      MBytes     GBytes

DVD Disc Capacity:	4,699,979,766   4,589,824   4,482      4.377