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afterdawn.com > forums > dvd±r discussion > dvd±r for newbies > ripping/extracting dts/ac-3 audio
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Ripping/Extracting DTS/AC-3 Audio
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clsgman
Newbie
_ 		15. June 2004 @ 16:34 _ Link to this message    Send private message to this user   
Can I use DVDShrink or other ripper/decoder to extract DTS or AC-3 audio only and burn audio on DVDs. I have many music/concert DVDs I'd like to play w/o the TV.
I figure I could put 2-3 soundtracks on 1 DVD w/o using up GBs for the VOB files.

But I think the audio is bound to the VOB files. I hope I'm wrong
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-LoNeR-
Senior Member
_ 		16. June 2004 @ 01:15 _ Link to this message    Send private message to this user   
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vurbal
Staff Member

2 product reviews
_ 		16. June 2004 @ 11:03 _ Link to this message    Send private message to this user   
You can demux the audio by ripping the VOBs with DVD Decrypter (or any ripper) and then opening them in DVD2AVI. Go to the Audio menu and under Output Method select Demux(AC3,DTS,WAV) and then (still on the Audio menu) go to Track Number and select the stream you want. If you're not sure which one you want you can just set Output method to Demux All Tracks. Finally, go to the File menu and select Save Project and save it. When it's done you'll have 1 or more audio files and a D2v file which you can delete.

Then you need a video file to mux them with when you author. You can produce a blank video file with AviSynth by making a text file with .AVS for the extension (with AviSynth installed of course) and just this line in it:

BlankClip(length=S*F,width=352,height=240,fps=29.97).KillAudio()

Replace 29.97 with 25 and 240 with 288 for PAL and replace S*F with the number of seconds of audio multiplied by the number used for fps at the end of the line (ie 29.97 for NTSC or 25 for PAL).

Encode the AVS file with the lowest bitrate CBR MPEG-1 file you can in TMPGEnc and you'll have the smallest possible DVD compliant video file to author with. Depending on what you want for menus, there are various authoring programs that can author the video and audio files into a DVD.

Edit: Added more complete DVD2AVI instructions.
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Rich Fiscus
@Vurbal on Twitter
AfterDawn Staff Writer

This message has been edited since posting. Last time this message was edited on 16. June 2004 @ 11:11
clsgman
Newbie
_ 		16. June 2004 @ 15:12 _ Link to this message    Send private message to this user   
Thanks for your replies.
If I Demux the audio (AC-3) for instance will it retain the multichannel attributes so that I can burn a surround sound track?
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vurbal
Staff Member

2 product reviews
_ 		16. June 2004 @ 16:55 _ Link to this message    Send private message to this user   
Yes, the audio will be exactly the same as the original.

Edit: I should also mention that all of the tools I listed are free.
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Rich Fiscus
@Vurbal on Twitter
AfterDawn Staff Writer

This message has been edited since posting. Last time this message was edited on 16. June 2004 @ 19:20
clsgman
Newbie
_ 		19. June 2004 @ 04:39 _ Link to this message    Send private message to this user   
Thanks again.
This is great. I can rip & burn all my mutichannel videos. One more question though if you don't mind.

A trial version of DVD Audio Extractor has helped me Demux the DTS tracks from my DVDs. The file format has a .dts suffix. If I burn that file, will it be read by my DVD standalone which has a DTS decoder?

I appreciate your input. Thanks again
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vurbal
Staff Member

2 product reviews
_ 		20. June 2004 @ 09:54 _ Link to this message    Send private message to this user   
I haven't really worked with demuxed DTS tracks, but the AC3 tracks I've worked with have had .AC3 extensions so that sounds right.
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Rich Fiscus
@Vurbal on Twitter
AfterDawn Staff Writer
clsgman
Newbie
_ 		20. June 2004 @ 15:21 _ Link to this message    Send private message to this user   
Thanks for your quick reply again.
So I gather that if you burn your .AC3 files to a CD, you would have a multichannel audio CD. If played on a 5.1 system, you would hear a surround sound track.

I assume that a .dts file can be burned and played the same provided I have a DTS decoder. (which I do). Thanks I'll give it a try.
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vurbal
Staff Member

2 product reviews
_ 		20. June 2004 @ 17:15 _ Link to this message    Send private message to this user   
Actually, if you go to Doom9 and read through some posts (I think most of what you need is in stickies) on the Audio forum, you'll find instructions for making a surround CD. I think it's a little more complicated than that because a Dolby Digital or DTS encoded CD uses PCM audio encoded with surround instructions, whereas actual AC3 or DTS also compresses the audio. I played around with making Dolby Digital CD's but since I don't have digital inputs on my old POS receiver (a requirement for playing those CDs) I had to test them at a friend's house and it was too much work for a CD that wouldn't even play on my system.

If your player supports miniDVD (DVD files on a CD - supported by many/most newer players) you can author to a single disc that way, which was my solution since my Apex player supported it. Then you just author a small DVD and burn it to CD.
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Rich Fiscus
@Vurbal on Twitter
AfterDawn Staff Writer
clsgman
Newbie
_ 		21. June 2004 @ 03:45 _ Link to this message    Send private message to this user   
Thanks verbal. I'll check it out.
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vurbal
Staff Member

2 product reviews
_ 		21. June 2004 @ 08:55 _ Link to this message    Send private message to this user   
Just be careful how much you read. You can spend a lot hours sidetracked on things like the Ambisonic thread there, which produces great results but I think I lost 2 weeks of my life playing with it. 8D
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Rich Fiscus
@Vurbal on Twitter
AfterDawn Staff Writer
afterdawn.com > forums > dvd±r discussion > dvd±r for newbies > ripping/extracting dts/ac-3 audio
 

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