Hi,
 
When I watch movies I often hear some excellent music , and I want to extract the music from video.
I have queried a number of methods and try to do it with some tools, but the sound quality becomes poor.
 
How can I make it? Thanks.
 

When you import video to Sonar, the audio and video track is separated. The audio should be the same quality.

Pretty much what Tom said.  Whether using Sonar or another audio tool, the audio is usually identical to the source unless you change settings in project.

You know, I had no idea Sonar could do this, and it could be the solution to a problem I have - I have a DVD/CD double pack of a concert, but have read reviews warning that the CD installs some kind of malware. For us relics still on 8.31, will this work? And will it work directly from a DVD?
 
Hmmm...

craigfowler
You know, I had no idea Sonar could do this, and it could be the solution to a problem I have - I have a DVD/CD double pack of a concert, but have read reviews warning that the CD installs some kind of malware. For us relics still on 8.31, will this work? And will it work directly from a DVD?
 
Hmmm...

First, the video needs to be converted to some format Sonar will read. This article refers to Sonar 5 :
 
http://www.soundonsound.com/sos/oct06/articles/sonartech_1006.htm
 
I have also recorded the audio directly from the DVD player's RCA audio out, as it's just a few minutes of audio that I needed, and I skip the ripping/conversion part.

Thanks for the link!

Ah.  I thought you were trying to  extract the audio from a file. Sonar does rip cds just fine  but I doubt it rips DVD audio.  Never tried.

Dub, you're right - Sonar don't rips DVD.. just trying to explain my process, it's faster to manually record a few mins of DVD output, rather than rip (using another software) and then convert / import the video.

Most DVD audio is encoded with some choice of licensed multi channel codec and it is muxed into the VOB interleave.
 
Extracting audio from a DVD is a completely different process than copying PCM off a CD, giving it a header, and adding file type extension.
 
There are many dubious apps that specialize in doing it.
 
 
best regards,
mike
 
 

Thank you for all your reply!
To get the audio from video, we can only convert the video file to audio file.
The conversion process requires decoding and encoding, maybe the audio quality is bound to fall.
So we should use appropriate encoder to make it.