-
DVDA File Size Discrepancy
I am making a DVD and I am trying to fit as much on as possible. I am hoping to fit 2hrs 45min on it.
When I put an .avi file into the DVDA project, there is a gigantic size discrepancy between the file size on the computer, and the file size on the DVD. On the computer the .avi is 351MB (40 min), while on the DVD it is 2.7GB.
Does anyone know why this is happening? Why does the DVD make this small file huge?
-
5 Replies
-
351 MB for a 40 minute AVI doesn’t sound right. Consider that 60 minutes is 13gigs. ALthough DVDAis known for overstaing the file size by a rather large margin the 351MB AVI sounds WAY off. Regardless of what size it is, when you render it in DVDA (it sounds like that’s what you’re doing) you should be OK.
Don -
That’s what I thought too. I thought I would be fine, considering that DVDA would actually compress the .avi file, but that does not seem to be what is happening. The .avi file is 351MB on the disk. I am positive of that. Perhaps the answer to my question lies in the kind of .avi file. Here are it’s properties.
Original .avi file properties:
Frame Rate: 24.9967
Field Order: None (Progressive Scan)
Pixel Aspect Ratio: 1.000 (Square)
Audio Attributes: 130 kBit/s, 48000 Hz, Stereo, MPEG Layer-3
Video Format: DivX 6.8 Codec (2 Logical CPUs), 512x384x24Would any of these properties cause DVDA to have such a huge discrepancy?
I’m starting out with a pretty low quality .avi video. Is the MPEG ‘compression’ creating a “better” file that already exists?
I tried turning the .avi into an MPEG using the DVD Architect NTSC DVD setting in Vegas, and the resulting file size was 1.8 GB.
_______________
Michael M. -
[Michael Morone] “Video Format: DivX 6.8 Codec (2 Logical CPUs), 512x384x24”
There’s your problem. DivX is a highly compressed format. It’s not a standard DV file.
Edward Troxel
-
Okay, thanks for clearing that up. I just have one more question. Is there anyway I could put these AVI files onto a DVD without losing quality? I tried rendering them in Vegas as an MPEG (DVD Architect NTSC DVD Format), with a variable bit-rate fairly low (the only way I could get the file size to remain similar), and the quality is noticably different.
Is there no way to convert the AVI file to an mpeg of the same size without losing quality?
Thanks for all the help,
Michael
-
There is no way. That is the nature of video compression. Going from one highly compressed format to another compressed format, and you will lose quality.
—
Terje A. Bergesen : https://terje.bergesen.info/
Reply to this Discussion! Login or Sign Up