HELP!@! .PCM to AIFF conversion

[mullet]

So I've tried everything I can think of to Convert a VOB containing PCM audio to a MOV that has both the Video and Audio. So far every little app I've tried has produced no audio but Video. I've tried Diva, mpeg2decX, MM2C and nothing has worked. So I figured I'd split them into elementary streams using OSEx... and then convert using that PCMtoAIFF 1.0... nope that only produced noise... why is it so hard to find an app that will do this PCM to WAV or AIFF conversion easily? Anyone have any answers?

Peace,
Scott Dominick

[Thargok]

#1 None of those programs are supposed to do audio...MPEG-2 is not an audio format.

#2 PCM audio has always been the cause of trouble

#3 ffmpegX should decode it for you, for more information see that forum.

[AntnyMD]

and then convert using that PCMtoAIFF 1.0... nope that only produced noise... why is it so hard to find an app that will do this PCM to WAV or AIFF conversion easily? Anyone have any answers?

PCMtoAIFF 1.0 will produce noise if the VOB was ripped/created using OS X programs. In order for this software to work properly, you must log in to the full OS 9, use an OS 9 ripper (set to demux streams), then drop the .PCM file onto the icon for PCMtoAIFF. Once you do this, the resulting AIFF file can be used in OS X programs, and the file wont be noise.

The only working alternative I've found is to make a DivX using 42, and use the audio from that. 42 converts PCM audio properly in DivX mode. I haven't tried ffmepgX on VOBs wit PCM audio ... it may work.

[brett]

here's how i did it in osx from an imovie vob:

(1) get the pcm-containing VOB off the idvd-recorded disk with DVDBackup. in this case, it's an edited second half of a game between duke and southern cal called "VTS_04_1.VOB".

(2) command line that vob's pcm audio into an "mp3" (heh):

mencoder -oac mp3lame -lameopts cbr=320 -ovc frameno /Users/bharding/Desktop/VTS_04_1.VOB -o duke.mp3

note: this "duke.mp3" appears to be 128, not 320, and is not an "mp3" that will play in qt or itunes, nor will any of the "tools" convert it, it seems. but it plays fine in vlc/mplayer. so we have to . . .

(3) after lots of guessing, i used something called divx tool osx. i changed the creator and type of the file to quicktime. (don't know if that is needed -- it didn't make the file playable in qt or itunes.) then i hit the "save mp3" button at the bottom. so now we have new mp3 file, "duke2.mp3".

(4) itunes will read duke2.mp3, so we can convert it to .aif therein.

done.

[paxman]

OK. This question is always coming up on various boards. I had to figure it out the hard way, but hopefully I have been able to help lots of people NOT go through all the crap I did! The problem is not with PCM audio, but with OSeX. There is a bug that prevents it from ripping PCM audio properly. You have to use another ripping app. I use DVDextractor 0.9b (get from versiontracker.com or other). It is an OS9 app, but you can run it in classic so long as the disc is NOT encrypted. If it needs to be deCSSed then you gotta boot into OS9 on this one. If you can't/won't boot into 9, maybe rip with DVDbackup first, removing the protection, then rip the disk image with DVDextractor. I've seen Yade out for OS X now, but I haven't tried it yet.

The resulting PCM audio file from DVDextractor is a proper PCM file, but PCM audio is headerless, and therefore needs to have one added in order for the computer to know what to expect from the file. Launch SoundHack (also get from versiontracker.com) and add a header to the file (apple-H). Change the header info to: 48000 Hz and 2 channel stereo. Save the file as an AIFF, and voila! your audio should play just fine. DVD audio is sampled at 48,000 Hz while CDs and VCDs, SVCDs etc, are 44,100 Hz. That's why we input 48,000 into the header info. Otherwise the computer will playback the audio too quickly or slowly.

Hope that helps. Let me know if i can clarify any of this.

[LABachlr]

I know this is a very old thread, but I just wanted to let you guys know that Yade X produces a PCM file with no noise. MacTheRipper was what was causing the noise in the PCM audio file. At least it was for me. The Yade X PCM file converts to AIFF via PCMtoAIFF 1.1 flawlessly!

[WiseWeasel]

MacTheRipper 2.6 now has demuxing capabilities, and support for PCM streams. It should be released soon...

[geezerbuttz]

Excuse me , But , the version of MTR you are using does not even demux , so how did you manage to get a PCM audio stream from it.???. oh , dont bother answering , you cant , i didnt code the ability , so argument over.........

This is a bit like the guy on VT that asked how to get the MP4 file from the app!!!!!!

Ahhhh, you demuxed the MTR rip with another app... so it was the other app that caused the issues as the rip is 1:1

BTW . i ran a check on MTR 2.6 PCM rip .... converted to AIFF with PCM2AIFF.. played back ok , no glitches...

GB

[Cornucopia]

Just a guess (usually an educated one), but I'm thinking that all those apps that got it "wrong" and gave you noise probably just saved to the wrong byte order: LSB vs. MSB. You could easily use a hex editor or other simple apps (some of which are probably available on the Net) to swap the byte ordering, then you ought to be good to go...

HTH,
Scott

[LABachlr]

Well, geezer, I wasn't even going to reply to your rude post, but I figured you need some enlightening, and some teachings on dealing with the very people that give you something to do in life.

A. I demuxed nothing. MTR produced the PCM file, plain and simple. I only used two programs. MTR to rip, and then PCM2AIFF to convert. The PCM file did not just appear out of thin air. Right after I ripped the DVD, it was there, along with the vid file. Apparently, you are not aware of all that your program does. And just so you know, the audio from my DVD was there when I played it back in QT as an AIFF file. It just had a lot of noise.

B. I know that you are not aware that your program does in fact produce PCM files from certain DVD's (in this case, it was a DVD made with iMovie), albeit a non-working PCM file, but you should have paid more attention when you were coding it, and coded it to say, "Sorry, I can't rip this DVD with a working audio file, as this version does not support it."

C. You really shouldn't insult the very people that give you something to do in life. If it weren't for us, you would not have anyone to test your program, use your program, give you feedback on your program, and, most importantly, commend you for your talent. I'm not denying it's a great program, because it is. It's just your attitude that needs adjusting. By me pointing out a weakness in your program, it only allows you to make your program stronger and better. As they say, you should thank your enemies, as they are the very ones that point out your weaknesses so that you can become a better player in whatever game you are playing. However, I would consider myself in a neutral position in this circumstance. Just trying to help others, including yourself, with my feedback.

I hope you take heed to at least some of my words of wisdom. But, just so you know, since you rubbed me the wrong way, I will definitely think twice about giving you any more helpful feedback about your program. You should have replied in the same manner as WiseWeasal. His reply was informative and cordial.

Good luck to you.

[WiseWeasel]

I don't think your comment was phrased very constructively either. I predict (another) flame war in 5...4...3...2... I don't think Geezer is doing this for people who give him something to do, but for himself, people helping out, and those who have donated to the cause, as well as for the Mac community at large to a certain degree, and to make Lupin (DVDBackup developer) get off his high horse thinking he can hold the DTOX people hostage by not releasing updates to his app until they share profits. As an aside, I don't think you have to worry about us lacking people willing to send in feedback on MTR. I also find it difficult to believe that MTR output a .pcm file, as it's not equipped to deal with those (until 2.6 is released), but I guess there might be something peculiar about how iDVD is mastering its DVDs. Regardless, if I had moderator status, I'd lock this thread before it degenerates into yet another verbal fisty-cuffs (hint to some mod). Under normal circumstances, you would have to use a demuxing tool to get the .PCM stream out of a VOB after extracting with MTR 2.0.2. I've never made a DVD with iDVD, so it's possible that has a strange VOB structure that's messing with MTR somehow. Since MTR is not supposed to have stream support, it's no surprise to me that any PCM files it created were unusable, whereas YadeX works correctly since it does have support for stream extraction.

[geezerbuttz]

mtr 2.0.2 can only output.... wait for it....

VOBS VOBS VOBS VOBS..

yes thats right VOBS.......

And for the hard of hearing And Terminaly Stupid..

VOBS.

no m2v , no ac3 , no Mpa , no DTS, no PCM...

The code is not in there , i should know , i got the bloody source in front of me.

How dare you tell me that that you know 'more' about the app than i do...

just to remind you ... i did write the bloody thing....

you say that

MTR produced the PCM file, plain and simple. I only used two programs. MTR to rip, and then PCM2AIFF to convert

So... mtr does NOT output a PCM stream.... it outs a VOB ,,,, im not surpised that the audio you decoded from that was screwed... you need to get a grip on file formats , and how a VideoObject handles and contains its streams....

As for needing to do something in my life...
How about being Married , having Children , managing my own buisness etc etc.. I think I have enough to do....

MTR , for the unenligtened , was only started as a ' what if?' project when i started to communicate with WW... it develeoped into the app it is now because of the support of a few members of the group who send in bug reports , new ideas , and other types of support. It is not developed by people who have no clue on what they are doing with the app.

I should of paid more attention when codeing it ? WTF are you on!!!!


If I need to adjust my attitude , you need to take your head out of your butt.

How can the app not doing something that it was never designed to do be a 'Weakness'??? you realy are a joke.

As for giving Usefull feedback , It would be usefull if you knew how the app worked , and stopped trying to tell the very people behind the app how it works...

Jesus Christ... give me strength!!!!!



You are in breach of the forum rules and are being issued with a formal warning.
/ Moderator lordsmurf

[WiseWeasel]

Oh man, this is getting ugly... Saw this one coming. If only I had the power to lock threads before they erupt. It's only downhill from here, I tells ya. Any mods around?

[AntnyMD]

Lock the thread because its gone off topic (plus since the solution to the current problem is YadeX, the problem is solved). Flame wars can be very entertaining sometimes!