private MovieBox createMovieBox(Movie movie) {
MovieBox movieBox = new MovieBox();
MovieHeaderBox mvhd = new MovieHeaderBox();
mvhd.setVersion(1);
mvhd.setCreationTime(DateHelper.convert(new Date()));
mvhd.setModificationTime(DateHelper.convert(new Date()));
long movieTimeScale = getTimescale(movie);
long duration = 0;
for (Track track : movie.getTracks()) {
long tracksDuration =
getDuration(track) * movieTimeScale / track.getTrackMetaData().getTimescale();
if (tracksDuration > duration) {
duration = tracksDuration;
}
}
mvhd.setDuration(duration);
mvhd.setTimescale(movieTimeScale);
// find the next available trackId
long nextTrackId = 0;
for (Track track : movie.getTracks()) {
nextTrackId =
nextTrackId < track.getTrackMetaData().getTrackId()
? track.getTrackMetaData().getTrackId()
: nextTrackId;
}
mvhd.setNextTrackId(++nextTrackId);
movieBox.addBox(mvhd);
for (Track track : movie.getTracks()) {
movieBox.addBox(createTrackBox(track, movie));
}
// metadata here
Box udta = createUdta(movie);
if (udta != null) {
movieBox.addBox(udta);
}
return movieBox;
}
