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Sampling audio from video clips

Posted: Tue Apr 08, 2008 5:57 am
by voltageHead
I recently found a few MP4's that i wanted to take samples from.
Some of them i can get them to load up in sound forge i can see the wave and video displayed on the screen but in says that i have a unsupported sample format or rate?I have the mpeg plugin.
Can any one give me some help in what to look for in mpeg audio sampling to get in to work.I may need a codex or something I think.
and help would be great.The sample rate I could not get to work was 22khz

Posted: Tue Apr 08, 2008 10:44 am
by DX
My choice would be to get a full duplex audio card, which allows you play audio (D/A) and record it (A/D) at the same time. So you can open any audio editor like cool edit /Adobe audition, and set the audio card settings to WAVE INPUT. Then, press record and play the file. Audio should be recorded that way.

That's the way I usually do.

Posted: Tue Apr 08, 2008 3:28 pm
by novielo
did you tried col edit pro? maybe it would work better for your video.
also, since it already have lost a part f it's audio quality because of the mp4 and you don't have a full duplex. you could record h
the audio on a external media.

Posted: Wed Apr 09, 2008 7:59 pm
by PitchBender
technically, if you can hear it on your PC then you can sample it. My soundblaster thingy soundcard has a setting in the control panel thingy that says "record what you hear". I check it then I just play the file on my PC and press record in Cool Edit. You can also get a free app (sorry can't think of the name) that will do this for you.