How do I determine the length of an audio recording I am recording programaticaly? My current solution is to just time the start/stop recording events on the User Interface (literally the time the user hits record, then hits stop recording.) Given a .aac audio file, is there some library call in Objective-C or Python to determine its length?
A:
On the iPad:
totalFrames = format->mFramesPerPacket * recordedPackets; lengthInSeconds = totalFrames / format->mSampleRate
MikeN
2010-05-17 19:44:08