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Old 20 Jan 2003, 12:53 PM   #1
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Question DVD to DivX 5.x using Gordian Knot - AC3 vs MP3?

Lately I've been following the DVD to DivX 5.x using Gordian Knot guide to do all my encoding. And then I came across all of the debate between AC3 audio and MP3. My question is, the Gordian Knot guide uses MP3 ... is this acceptable? And how would I go about using AC3 with Gordian Knot?

Second, all of my rips have lots of artifacts, they're pretty blocky. Using 2 pass and Divx 5 pro ... I'm getting max file size... I don't know what else to try! What should the "compatibility" be at, and all those other settings? I wish the guide went into more detail... any help?
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Old 20 Jan 2003, 05:18 PM   #2
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My question is, the Gordian Knot guide uses MP3 ... is this acceptable?
Nothing wrong with that. In fact, using MP3 (or even OGG) gives you smaller filesize for a small reduction in quality (as long as you are using a respectable audio codec). AC3 basically is the original sound stream found in a lot of DVDs, but it is considerably large. Hence you should aim for a minimum of 2 CDs if you are planning to use AC3.

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And how would I go about using AC3 with Gordian Knot?
You can rip the AC3 track out using DVD2AVI and mux it using nandub or VirtualDubMod.

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Second, all of my rips have lots of artifacts, they're pretty blocky. Using 2 pass and Divx 5 pro ... I'm getting max file size...
What are your quantisizer settings?
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Old 20 Jan 2003, 07:48 PM   #3
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using ac3 isnt that complicated.

have dvd2avi extract ac3 like enchanter said before.
afterwards mux theses audiostream(s) with your avi using CORRECT interleaving settings and you're done!

for a guide click my upper anigif
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Old 21 Jan 2003, 11:18 PM   #4
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have dvd2avi extract ac3 like enchanter said before.
afterwards mux theses audiostream(s) with your avi using CORRECT interleaving settings and you're done!
How do you determine the correct interveaving settings ?
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Old 21 Jan 2003, 11:21 PM   #5
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How do you determine the correct interveaving settings ?
by using what has proven to be good; i.e. using the settings that were proposed in TSUNAMIS MUXING table.

you'll find the values in my guide.
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Old 22 Jan 2003, 01:36 AM   #6
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Oh right, so is MP3 the same principle as at the moment I have been intervealing every one frame - as in are there different settings for MP3 interleaving.
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Old 22 Jan 2003, 06:44 AM   #7
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For muxing MP3, there are various interleave settings that will work just as well. For me, I interleave every 1000 ms or 24 frames, and it works fine for me.
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Old 22 Jan 2003, 07:06 AM   #8
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Oh right ok cool - so is there any advantages / disadvantages of different interleaving settings for MP3, or doesn't it really matter ?
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Old 22 Jan 2003, 08:04 AM   #9
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so is there any advantages / disadvantages of different interleaving settings for MP3, or doesn't it really matter ?
As long as it works properly, what more can you ask for?
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