public static string FixVideoFileIfNecessary()
{
Java.IO.File videoFile = new Java.IO.File(Path.Combine(Environment.ExternalStorageDirectory.ToString(), "video_to_fix.mp4"));
using (IDataSource channel = new FileDataSourceImpl(videoFile.AbsolutePath)) {
IsoFile isoFile = new IsoFile(channel);
IList trackBoxes = isoFile.MovieBox.GetBoxes(Java.Lang.Class.FromType(typeof(TrackBox)));
bool hasError = true;
foreach (TrackBox trackBox in trackBoxes)
{
TimeToSampleBox.Entry firstEntry = trackBox.MediaBox.MediaInformationBox.SampleTableBox.TimeToSampleBox.Entries[0];
if (firstEntry.Delta > 10000)
{
hasError = true;
firstEntry.Delta = 3000;
}
}
if (hasError)
{
Movie movie = new Movie();
foreach (TrackBox trackBox in trackBoxes)
{
movie.AddTrack(new Mp4TrackImpl(channel.ToString() + "[" + trackBox.TrackHeaderBox.TrackId + "]", trackBox));
}
movie.Matrix = isoFile.MovieBox.MovieHeaderBox.Matrix;
using IContainer outt = new DefaultMp4Builder().Build(movie);
string filePath = Path.Combine(Environment.ExternalStorageDirectory.ToString(), "fixedVideo.mp4");
using FileChannel fileChannel = new RandomAccessFile(filePath, "rw").Channel;
outt.WriteContainer(fileChannel);
return(filePath);
}
}
return(videoFile.AbsolutePath);
}
// You can merge any amount of movies, but some format are less stable
public void Merge(string sourceDirectory, string movie1, string movie2, string destinationDirectory, string destinationFile)
{
var inMovies = new Com.Googlecode.Mp4parser.Authoring.Movie[] {
MovieCreator.Build(Path.Combine(sourceDirectory, movie1)),
MovieCreator.Build(Path.Combine(sourceDirectory, movie2)),
};
var videoTracks = new List <ITrack>();
var audioTracks = new List <ITrack>();
foreach (var m in inMovies)
{
foreach (var t in m.Tracks)
{
if (t.Handler.Equals("soun"))
{
audioTracks.Add(t);
}
if (t.Handler.Equals("vide"))
{
videoTracks.Add(t);
}
}
}
var result = new Com.Googlecode.Mp4parser.Authoring.Movie();
if (audioTracks.Count > 0)
{
result.AddTrack(new AppendTrack(audioTracks.ToArray()));
}
if (videoTracks.Count > 0)
{
result.AddTrack(new AppendTrack(videoTracks.ToArray()));
}
var outContainer = new DefaultMp4Builder().Build(result);
var fc = new FileOutputStream(Path.Combine(destinationDirectory, destinationFile)).Channel;
outContainer.WriteContainer(fc);
fc.Close();
}