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Old July 9th, 2010, 08:07 AM   #1
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Huge AVI renders

I shot a wedding and edited the clips together for about a 40 minute video with titles and some FX effects too. Well I was going to burn to DVD so i went through the normal no reduction render to AVI and the file turned out to be like 95gig as reported by Windows Explorer. This can't be right can it and what the heck can you do with an AVI that big? I ended up obviously ditching the burn to DVD idea. After I reduced it in VirtualDub to a 720 AVI it was still like 15Gig before I filled up the drive I was wrting to and had to quit.

What's the normal file size for a 40 min 1080p AVI??

I ended up rendering it out as a mp4 and it went to about 1.5 Gig but I haven't had a chance to view it to see how it looks.

Is this mucho strange???
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Old July 9th, 2010, 08:40 AM   #2
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uncompressed avi files are large, that is normal.
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Old July 9th, 2010, 08:50 AM   #3
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Harry, instead of rendering to uncompressed AVI, just render to the proper DVD file. Is this a Blueray? or SD DVD? If SD just render to MPEG2 which will be MUCH smaller than uncompressed AVI.
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Old July 9th, 2010, 09:31 AM   #4
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I didn't say anything before, but as Edward points out, not sure why you're rendering to avi.
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Old July 9th, 2010, 09:51 AM   #5
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the reason is the cookbook step-by-step I developed w/ Perrone's help

1. 1920x1080p .MOV from camera
2. Cineforn HDLink convert to 1920x1080p AVI
3. Pull into Vegas and edit add titles FX etc then render out to AVI using Lagrith w/ ar 1
4. VirtualDub Lanczos scaler for resize to 854x480 w/ Compression set to Lagarith here too
5. Open into Vegas and render to MPEG2
6. Pull into DVD Architect and burn DVD

This works where everything else I tried failed. That's why I did what I did. If there is a better way that works I'm all ears!!

Thanks for the feedback.
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Old July 9th, 2010, 10:38 AM   #6
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Quote:
Originally Posted by Harry Simpson View Post
What's the normal file size for a 40 min 1080p AVI??
That depends on the frame rate and whether it uses 3 or 4 bytes per pixel.

For example, if it uses 4 bytes per pixel, that would be 1920 x 1080 x 4 = 8,294,400 bytes per frame. Assuming 30 fps, that would be 248,832,000 bytes per second, which is 14,929,920,000 bytes per minute, so a 40-minute 1080p 30 fps video would contain 597,196,800,000 bytes of raw image data, which is about 556 GB the way the computer converts bytes to gigabytes (a gigabyte is 1024 = 1,073,741,824 bytes). Or if it uses 3 bytes per pixel, then of 556 is 417 GB. So, your 95 GB AVI was actually quite well compressed and reasonably small, especially if it used non-lossy compression.
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Old July 9th, 2010, 11:28 AM   #7
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Thanks Adam,

Gee so even with this great compression - rendering this out to a mpeg2 for DVD would/should produce media content that would be too large for one DVD or, like the MP4 it will render to a usable size?

Can one use a double layered DVD to play SD back from a DVD player. course that's only 8gig or so. I reackon it would get back to tweaking the compression/quality balance eh?
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Old July 9th, 2010, 11:46 AM   #8
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MPEG2 would compress it much better yet because it is a lossy type of compression. Plus, a DVD uses SD, which is only 720 x 480 (in NTSC), which by itself reduces the size by a factor of 6 (1920x1080 / (720x480) = 6).

And yes, you can burn it to a dual layer DVD and play it back. But if it is only 40 minutes long, it should fit on a single layer DVD very nicely.
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Old July 10th, 2010, 08:31 AM   #9
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Thanks for the info and inspiration - trying it again.
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