// Decoding Time to Sample Box
private void ParseStts(Box sibling)
{
var box = sibling as TimeToSampleBox;
_reader.BaseStream.Seek(4, SeekOrigin.Current); // FullBox
box.EntryCount = _reader.ReadUInt32();
for (int i = 0; i < box.EntryCount; i++)
{
var entry = new TimeToSampleBox.Entry();
entry.SampleCount = _reader.ReadUInt32();
entry.SampleDelta = _reader.ReadUInt32();
box.Entries.Add(entry);
}
}
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);
}
