Hi everyone, this is my first post and I have a problem that I'm struckling with for a few weeks now. I have tried to rip the audio from a DVD with a live concert using DVD Decrypter (IFO Mode; File Splitting by Chapter) and demuxing the audio. The resulting tracks all have a negative delay time. After importing in Wavepad I noticed that the files are not gapless when joining them (after removing the delays). I also noticed that all tracks start with a fade in, while there should be a continuous loud crowd noise.
However when I demux the audio without File Splitting, the whole resulting track is gapless. I don't want to cut this big file manually in separate tracks. So my question is, how can I rip the audio from a DVD gaplessly split into chapters without having to deal with delays? Or is that impossible?
Cheers!

rip the whole stream and use the chapter stops to create a CUE file

then split the stream up by audio/cue


later

What format are these files? (You should be able to join WAV file without a gap.)

If you are joining the files with Wavepad, why are you splitting the tracks first? Are you making a CD, or MP3s? (Whenever I've made a "live" CD, I've used one long WAV file, and added the track-index points with my burning software).

I don't understand that. It takes "work" (i.e. an algorithm) to fade-in a digital track. I can't see how it's happening accidently!

It's really not that much work, and you might not want to use the exact same chapter-points as the original DVD anyway.

And, I wouldn't expect the delay to cause a problem. The delay is just supposed to help sync the audio & video. I wouldn't expect a gap to be added to the ripped audio.... But I dunno, maybe it does foul things up if you rip separate chapters.

My method:

Rip the whole AC3 file. Convert to WAV. Use CDWAVE to split into tracks on sector boundries.

http://www.hydrogenaudio.org/forums/index....showtopic=43147

Edit: Although Stream Processing with DVD Decrypter appears to be the most direct method, if you still have the full disc audio track you may want to just use that with a cuesheet. I would look at ChapterXtractor and Chap2Cue to create your cuesheet.

The AC3 should not be transcoded to another format. If necessary AC-3s can be cut using a hex editor the same way as CBR mpeg layer-3 with no bit reservoir. Audio delay only matters when there is also a video stream compared to which the audio is either early or late.

I second the reply by xmixahlx.

Will WavePad open AC3 files?

As a live concert DVD I am expecting a PCM audio track.

To add a bit more to my previous post. I only convert to WAV/FLAC because I often make audio cd's from DVD only concerts.

Do any DAPs support ac3? If not, then you're probably going to be converting.

well i ALWAYS keep just the ac3/cue because:

* i have a rockboxed h320 so playback isn't an issue
* k3b uses liba52 to decode ac3 files & burn

so if i need to edit the file i'll decode the whole thing to wave, edit what i want, create new tracking and then use shntools to fix the tracks and burn with k3b.


later

Even if you can't play AC-3 on your current hardware, that properly made copy will serve as 'lossless' source for future transcodes. It is lossless compared to the copy you got and maybe only copy publicly available.

Of course normal PCM data will make your life much easier, since you can work with nice visual waveform.

Hi guys,
Thanks for all the help. I managed to get a perfect rip using the following:
1 - DVD Decrypter: demux in IFO (no file splitting)
2 - Chapter-X-Tractor: find chapter CUE file
3 - Belight/Besweet (only in case of lossless format): end result wav-file
4 - Wavepad: cut into chapters using CUE file

I only have one question left. Is the audio track on a DVD always one big file? If yes, how does the delay work? Is the audio skipped or speed up at the beginning of a new video chapter? When I listen to a DVD I never hear a discontinuous sound. I'm very curious how it works.

Cheers!