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Jeremy Doyle
compressor 2 question
on Oct 31, 2005 at 9:58:19 pm

I have a timeline that is 2 hr 37 minutes or 157 minutes. I figure I'll just modify one of the compressor presets so I chose the dvd best quality 150 minutes -16x9. It has mpeg 2 3.7 Mbps 2-pass listed, but when I go into the inspector window and look under the quality tap it says it allows up to 118 minutes of video on a DVD-5.

Shouldn't this listing than be for the 120 minute setting? Of course the setting for 120 minutes says 94 minutes in the inspector and the 90 minute says 80.

I have to go all the way down to 2.4 Mbps for the inspector to allow 158 minutes. Why are the presets so off?


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Craig Seeman
Re: compressor 2 question
on Nov 2, 2005 at 1:38:34 am

How were you encoding the audio? Note the preset says 150 minutes with Dolby Digital Audio or 120 minutes with AIFF.


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derek woods
Re: compressor 2 question
on Nov 2, 2005 at 12:04:49 pm

I just did the exact same thing! is that a bad setting? I compressed it out and it was 5 gigs! can some of the experts look at the settings and see what they think?
i don't use dvdsp as much as fcp, so i used an old ken stone article and compressed it that way
http://www.kenstone.net/fcp_homepage/compressor_warmouth.html

it seems weird the first version with a more than 120 preset would be so screwed up.


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Jeremy Doyle
Re: compressor 2 question
on Nov 2, 2005 at 2:23:04 pm

If I compress the video using this preset the video file doesn't even fit on the disc much less any audio.

But if you must know I was going to use ac3 at 192 in 2/0. Like I said the video file is larger than what will fit on a disc with that preset


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Charles Simonson
Re: compressor 2 question
on Nov 4, 2005 at 7:50:04 pm

Here is a good bitrate calculator that I like:
http://www.3ivx.com/support/calculator/
It what built for a different format, but the numbers still work for MPEG-2 compression.


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Jeremy Doyle
Re: compressor 2 question
on Nov 4, 2005 at 8:20:57 pm

I don't mind doing the math, I was just complaining because if the preset says 150 then it should allow 150 not 120.

I liked the mpeg 2 export directly from my timeline where it would estimate my file size as I moved my sliders, but now with newer versions I use compressor and it doesn't have a file size estimater that I know of just the video length calculations.


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Craig Seeman
Re: compressor 2 question
on Nov 4, 2005 at 10:25:29 pm

After inputing your file into Compressor 2 and then either using a preset or making your own, Select the file's setting in the Batch window and look at the Summary in the Inspector window. It will tell you the estimated file size.

I just input a file of 1:15 minutes DV (about 16G) and selected the 150 minutes Best Encode 4:3 preset and it shows me an estimate of 2.03GB after compression.


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Jeremy Doyle
Re: compressor 2 question
on Nov 6, 2005 at 10:28:35 pm

Thanks for the tip. I didn't know that.


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