rendering...why is file larger than original

gbholden wrote on 9/5/2003, 11:58 AM
I have a movie that I captured using Movie Mill. Captured as an MPEG 2 file with DVD NTSC settings. When I look at properties the size of file is 3.48 or 3,742,534,144 bytes
In Vegas I did basic editing out of commercials...left the black frames which were fine for fade in and out and even deleted a part of the intro. It is amlost 1hr and 36 min long. When I render it as an MPEG 2 it gets almost to the end and then I get an error message ....AllocateMixBuffer(Microsoft Sound Mapper)! m_wfxPrepared.nSamplesPerSec is 48000![m-ccPreroll 245468925895644336 nBuffers 571540087]
Not sure what this means but I think it has something to do with the file being to big. When I check properties of what was rendered the size of the file is 3.99 or 4,294,926,336 bytes.
How can a file after deletings some of it end up larger than the original? I could understand if I changed the file format but I didn't.

Comments

Former user wrote on 9/5/2003, 12:28 PM
Looks like the error is related to Audio, but not sure.

Is the new MPEG at the same bitrate as the original. If it is a higher bitrate or a variable bitrate, the file will be bigger.

Dave T2
hugoharris wrote on 9/5/2003, 12:44 PM
The file size can differ depending on bitrate, especially with different codecs and VBR (variable bit rate) encoding.

The error message is likely due to the FAT32 hard disk file limit (4 GB). To work with larger files, you need to convert to NTFS file system. You can search Microsoft's site for instructions - I recently converted my boot drive too. Interestingly, I needed to reinstall Vegas and DVD-A afterwards.

Good luck,
Kevin.
Jsnkc wrote on 9/5/2003, 1:07 PM
Also don't edit MPEG-2 files, then re-render them to MPEG-2, you'll get a lot of quality loss. Best to start with AVI's, then edit and render to MPEG-2, you'll get much better quality.
TheHappyFriar wrote on 9/5/2003, 1:17 PM
Use TMPGenc (www.tmpgenc.com) and cut the parts out of your mpeg-2 by spliting the mpeg file. Then (within the 30 day trial) you can re-join the mpeg-2 file into 1 and put that on DVD. Doesn't re-encode! :)
gbholden wrote on 9/5/2003, 4:05 PM
I'm new at this and not sure what you mean by the bit rate and changing it.
My system is the XP Media center which when I record with it puts an extension on the end that can only be recognised by MY DVD and I don't like the way that program sets its menus. For some reason the Media Center controls the capture device...which is a TV tuner...and I can't use other capture programs...not even My DVD or Windows Movie Maker. Movie Mills is put out by the same ones thatmade the capture card and seems to be able to record without any problem so I've use it. It only has an option for wav or mpeg. I've set it's video bitrate at 5,000,000 and I noticed Vegas has a variable bitrate 0f 8,000,000 average bps of 6,000,000 and min of 192,000,000. Is this what you were talking about and should I change it to 5,000,000.
I have directions for converting my hard drive from FAT but was affraid I'd mess things up...like Windows and the files I already have.
I saw that avi files were the best to capture in but when I tried it with a short video the file was so large it was rediculas and I didn't dare try with a movie. I do have a P4 120 GB hard drive but it looked like a 1 and a half hour movie would take up the whole drive