How can I extract and export audio from video files?

  • Thread starter Thread starter madfresh
  • Start date Start date
madfresh

madfresh

New member
Ey, what's up?!

I wanna spice up my tracks with samples from films/shows/documentaries etc. Does anyone know the best way to extract audio from video files and export it as Wav.? I tried to use the Streaming/Exporting Wizard in VLC but it seems like you have to export the audio from the entire video file and this takes quite a long time.

Thanks!!
 
SUPER from erightsoft.com will extract audio from video as any format you want.

It's FREE, too.... darned handy tool to keep around if you're messing with video.
 
madfresh said:
... but it seems like you have to export the audio from the entire video file and this takes quite a long time.
Click to expand...

Well then...don't "export"...instead just connect the audio outs of your video playback device to your recording rig...then simply play back the sections of video you want while *recording* the audio output into your recording device.

:)
 
Extracting audio from video takes a few stages, but is OK once you are used to it. The tools you need differ depending on the file container format (such as *.AVI, *.MPG) and the audio codec involved. You may find a 'one click' solution for the video files you use, but otherwise it involves:
1. Demultiplexing - separating the audio from the video
2. Transcoding - from lossy formats such as AC3 to WAV
3. Resampling - the most common audio sample rate in video is 48khz, typical audio-only sample rate is 44.1khz.

There are some superb help sites:
www.videohelp.com
www.doom9.org

The above sites have FAQs and links which offer an amazing range of freeware tools and step-through instructions for pretty much every conceivable task.

An invaluable free utility for looking at what is inside any particular A/V file is:
Mediainfo
 
One more thought - if all you want is small samples, set up your sound driver to record 'what you hear' and dub direct from your video player app to your audio app.

Most 'regular' techniques involve extracting the audio from the whole file, as a video file is really two data streams interleaved, one of audio and one of video, and from that point of view manipulating just the audio file requires extracting it. I don't have the same requirements as you - I tend to work on entire soundtracks - however, you will find that manipulating video always tends to be more time-consuming than audio alone - there's simply more data for the computer to wade through, no matter how little of it you actually want to use...
 
miroslav said:
Well then...don't "export"...instead just connect the audio outs of your video playback device to your recording rig...then simply play back the sections of video you want while *recording* the audio output into your recording device.

:)
Click to expand...

YES. Unless you want to get all the audio from a 30-60 minute video, this is probably the quickest way.
 
Thanks for all the suggestions and info guys!

I'm gonna try to set it up in Reaper (which is the software I use at the moment) so that I can record what I play in VLC. It seems like the easiest way to do it. Btw, if any knows how to do that, please let me know. I'm using a Mac.

Cheers
 
Oh yes! Managed to make it work. Not with VLC though, it didn't like my sound card. Used Movist (similar to VLC) instead and set it up in Reaper so that it records the output of the computer. Awesome. Thanks!
 
You must log in or register to reply here.
Back
Top