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Old May 14th, 2007, 03:01 PM   #1
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Detecting Audio frame rate

How can I detect the frame rate of an audio file? I received a song as an mp3 and I plan on cutting footage (to be shot) on it. It is a music video so the visuals have to sync with the music track.
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Old May 15th, 2007, 09:47 AM   #2
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Oliver, welcome to DVi.

I am not sure I understand your question - frame rate reffers to video and not audio. What do you exactly mean?
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Old May 15th, 2007, 10:44 AM   #3
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Originally Posted by Ervin Farkas View Post
Oliver, welcome to DVi.

I am not sure I understand your question - frame rate reffers to video and not audio. What do you exactly mean?
Hey Ervin,
well lets say you create a composition in after effect with 60fps as its frame sampling rate, your audio will play distorted, which means audio has a frame rate lower than that one. I tried it with a song I ripped off of a CD. It plays fine on 24fps even 25fps. When I jump to 30, it starts getting distorted. At 60fps, forget it.
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Old May 15th, 2007, 12:12 PM   #4
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Again, frame rate cannot refer to audio - audio has no frames. Are you talking about sample rate? Your wording "video sampling rate" makes me think you don't have a clear understanding of video frame rate and audio sampling rate.

What you may be experiencing is inadequate audio sample rate - commercial audio CDs have a sample rate of 44.1KHz while video works with audio at 32KHz or 48KHz. But any decent NLE should convert the sample rate automatically when you import the audio clip - so I am still confused. When you start your project what template do you choose in your NLE?

Can you elaborate on this "distorted" audio? What does it sound like?
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