I am trying to read PCM samples from a (converted) MP3 file using NAudio, but failing as the Read method returns zero (indicating EOF) every time.
Example: this piece of code, which attempts to read a single 16-bit sample, always prints "0":
using System;
using NAudio.Wave;
namespace NAudioMp3Test
{
class Program
{
static void Main(string[] args)
{
using (Mp3FileReader fr = new Mp3FileReader("MySong.mp3"))
{
byte[] buffer = new byte[2];
using (WaveStream pcm = WaveFormatConversionStream.CreatePcmStream(fr))
{
using (WaveStream aligned = new BlockAlignReductionStream(pcm))
{
Console.WriteLine(aligned.WaveFormat);
Console.WriteLine(aligned.Read(buffer, 0, 2));
}
}
}
}
}
}
output:
16 bit PCM: 44kHz 2 channels
0
But this version which reads from a WAV file works fine (I used iTunes to convert the MP3 to a WAV so they should contain similar samples):
static void Main(string[] args)
{
using (WaveFileReader pcm = new WaveFileReader("MySong.wav"))
{
byte[] buffer = new byte[2];
using (WaveStream aligned = new BlockAlignReductionStream(pcm))
{
Console.WriteLine(aligned.WaveFormat);
Console.WriteLine(aligned.Read(buffer, 0, 2));
}
}
}
output:
16 bit PCM: 44kHz 2 channels
2
What is going on here? Both streams have the same wave formats so I would expect to be able to use the same API to read samples. Setting the Position property doesn t help either.