Mac: extracing VIDEO_TS audio; replacing VIDEO_TS audio?

[cleantone]

Okay. I am hoping to figure out a way to demux audio from a DVD and then remux new audio back onto it without loosing video quality. I made a DVD of a VHS tape a while ago. The audio has a flaw. I can fix it and put the audio back on. The exact length and sync shouldn't change. I figure ffmegx should be able to make this happen. Anyone know?

[ffooky]

I'd go with one of the demux options in the File menu of MPEG Streamclip. If you open the first main VOB in a VIDEO_TS it'll give you the option of opening the whole set as one. Once you've made your corrections in the audio you could remux (as a VIDEO_TS folder) with ffmpegX or, as long as the audio and video streams are identically named apart from extension and in the same directory, you can use Toast.

[U2Lynne]

You might want to take a look at this thread: http://www.thetradersden.org/forums/...ad.php?t=32975 There are some software links to applications to demux the DVD and remux new audio.

edit: And there goes ffooky replying first. How does he always get to these Mac threads so darned fast!?!?

[cleantone]

Okay. I'll try that. It tells me I need to update my mpeg2 component or something. The link it gives me doesn't seem to work on apple.com though. Anyway, how do you open all of the VOB at once? I have a VIDEO_TS with 4 VOB's. It seems to open one at a time. Thanks for the help guys!

[ffooky]

Yep, due to licensing reasons you have to buy/obtain the MPEG-2 component.

Right/control click on the first 1,024 meg VOB in your VIDEO_TS folder, select to open with MPEG Streamclip and then you'll be offered the choice of opening just that VOB or the whole VTS_0*.

[cleantone]

Thanks! I got that part done. Now how do I remux? Do I need that mpeg2 thing to do that?

[ffooky]

Originally Posted by cleantone

Thanks! I got that part done. Now how do I remux? Do I need that mpeg2 thing to do that?

Not as far as I'm aware with ffmpegX but probably with Toast. There are other options at this point...MovieGate comes to mind...but give ffmpegX a bash first. You'll need to go the tools->mux option and then it will be obvious what to do. I'd advise selecting Open Terminal Window from the dropdown menu under ffmpegX in the menu bar, it helps when trying to find out what's gone wrong, if it does

[cleantone]

Thanks. I am working on it right now. It doesn't seem to want to take aiff so I am making an mp3 and I hope that will work and keep sync. I wasn't able to fine the terminal. I have version 0.0.9u.

[ffooky]

Ah, I hadn't anticipated your using AIFF. Convert that to WAV with iTunes/QuickTime and ffmpegX will play nice and avoid a/nother lossy stage.

[cleantone]

Okay. I am trying it with WAV right now. It looks to be making an .mp2 from the WAV file. I'll see if it works. Thanks for the help. I have to leave shortly.

[cleantone]

I can't figure out why it says "unable to read from" on that folder. The permissions are okay for read and write. Any idea?

ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX static build for ffmpegX
configuration: --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264
built on Dec 1 2005 03:50:24, gcc: 3.3 20030304 (Apple Computer, Inc. build 1666)
Input #0, wav, from '/Users/xxxxxxxx/Desktop/new soundtrack.wav':
Duration: 00:45:14.2, start: 0.000000, bitrate: 1535 kb/s
Stream #0.0: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s
Output #0, mp2, to '/Users/xxxxxxxx/Desktop/new soundtrack.wav.mp2':
Stream #0.0: Audio: mp2, 48000 Hz, stereo, 224 kb/s
Stream mapping:
Stream #0.0 -> #0.0
video:0kB audio:74217kB global headers:0kB muxing overhead 0.000000%
INFO: [mplex] mplex version 2.2.2 ($Date: 2003/05/13 20:27:15 $)
**ERROR: [mplex] Unable to read from /Users/xxxxxxxx/Desktop/xxxxxxxx/VIDEO_TS.

[ffooky]

Where is the relevant M2V file (as demuxed by MPEG Streamclip) located ?

[cleantone]

On the desktop right now. That is where the WAV file was. Does it need to be in the VIDEO_TS folder?

[ffooky]

Nope. In ffmpegX's mux tab you need to select the M2v as the video and your edited WAV as the audio. ffmpegX will create it's own VIDEO_TS folder (along with a muxed MPEG beforehand) in the same directory as the source files. For safety's sake it's probably a good idea to pop them in a directory of their own before muxing.

[cleantone]

M2v? What is that? I need to bail in just a couple minutes. Thanks for the help!

googled:

Packetized Elementary Stream. It contains only video related data.

M2V files are normally destined to be multiplexed (muxed), which is the process of adding audio data and perhaps other streams such as subtitles, before use. M2Vs are created by demultiplexing (demuxing) an existing MPEG-2, or by converting another video format to MPEG-2.

The file extension M2V is mostly found with SFV Host Files.

So this is something I was supposed to make with mpeg streamclip? I'm on my way out. Hopefully we can pick this up tomorrow or another day. Thanks.