Question

I’m using NAudio library in a C# application. I’m trying to seek an audio (*.mp3 file) to the position I want.
However I didn’t figure out how to do it.

//Play the file starting from 16th second
waveStream.Seek(16, SeekOrigin.Begin);

And … It played starting almost from the beginning, but not from the 16th second. I also found a solution I thought true:

waveStream.Seek(waveStream.WaveFormat.AverageBytesPerSecond * 16, SeekOrigin.Begin);

It seems it’s closer the truth. Is my resolving true or not? If not what should I do?

Answer 1

You can set Position directly on a WaveStream, which must be converted into a byte offset – so yes, multiplying the average bytes per second by the number of seconds will get you to the right place (at least with regular PCM WAV files). WaveStream also has a helper property called CurrentTime allowing you to use a TimeSpan and it does the same calculation for you.

audioFile.Position += audioFile.WaveFormat.AverageBytesPerSecond * 15;