private static void decodeMP4(string inFile, string outFile)
{
using (var inFileStream = File.OpenRead(inFile))
{
var cont = new MP4Container(inFileStream);
var movie = cont.getMovie();
// --- read cover-picture if exists ---
if (movie.containsMetaData())
{
var meta = movie.getMetaData();
if (meta.contains(MetaData.Fields.COVER_ARTWORKS))
{
coverPicture = meta.get(MetaData.Fields.COVER_ARTWORKS).First().getImage();
}
}
var tracks = movie.getTracks(AudioTrack.AudioCodec.CodecType.AAC);
if (tracks.Length == 0)
{
throw new Exception("movie does not contain any AAC track");
}
var track = (AudioTrack)tracks[0];
using (var wav = new WaveFileWriter(File.Create(outFile), track.getSampleRate(), track.getChannelCount(), track.getSampleSize()))
{
var dec = new Decoder(track.getDecoderSpecificInfo());
var buf = new SampleBuffer();
while (track.hasMoreFrames())
{
if (track.currentFrame % 10 == 0)
{
Console.WriteLine(track.currentFrame.ToString("N0") + " / " + track.frames.Count.ToString("N0"));
}
var frame = track.readNextFrame();
dec.decodeFrame(frame.getData(), buf);
wav.write(buf.getData());
}
}
}
}
