ServeMp4public class ServeMp4 extends AbstractHandler | Created with IntelliJ IDEA.
User: sannies
Date: 10/28/12
Time: 11:08 AM
To change this template use File | Settings | File Templates. |
| Fields Summary |
|---|
| com.googlecode.mp4parser.authoring.Movie | movie |
| Methods Summary |
|---|
| private static double | correctTimeToSyncSample(com.googlecode.mp4parser.authoring.Track track, double cutHere, boolean next)
double[] timeOfSyncSamples = new double[track.getSyncSamples().length];
long currentSample = 0;
double currentTime = 0;
for (int i = 0; i < track.getDecodingTimeEntries().size(); i++) {
TimeToSampleBox.Entry entry = track.getDecodingTimeEntries().get(i);
for (int j = 0; j < entry.getCount(); j++) {
if (Arrays.binarySearch(track.getSyncSamples(), currentSample + 1) >= 0) {
// samples always start with 1 but we start with zero therefore +1
timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(), currentSample + 1)] = currentTime;
}
currentTime += (double) entry.getDelta() / (double) track.getTrackMetaData().getTimescale();
currentSample++;
}
}
double previous = 0;
for (double timeOfSyncSample : timeOfSyncSamples) {
if (timeOfSyncSample > cutHere) {
if (next) {
return timeOfSyncSample;
} else {
return previous;
}
}
previous = timeOfSyncSample;
}
return timeOfSyncSamples[timeOfSyncSamples.length - 1];
| | protected static long | getDuration(com.googlecode.mp4parser.authoring.Track track)
long duration = 0;
for (TimeToSampleBox.Entry entry : track.getDecodingTimeEntries()) {
duration += entry.getCount() * entry.getDelta();
}
return duration;
| | public void | handle(java.lang.String target, org.eclipse.jetty.server.Request baseRequest, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
String start = request.getParameter("start");
List<Track> tracks = movie.getTracks();
movie.setTracks(new LinkedList<Track>());
// remove all tracks we will create new tracks from the old
double startTime = Double.parseDouble(start);
double endTime = (double) getDuration(tracks.get(0)) / tracks.get(0).getTrackMetaData().getTimescale();
boolean timeCorrected = false;
// Here we try to find a track that has sync samples. Since we can only start decoding
// at such a sample we SHOULD make sure that the start of the new fragment is exactly
// such a frame
for (Track track : tracks) {
if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {
if (timeCorrected) {
// This exception here could be a false positive in case we have multiple tracks
// with sync samples at exactly the same positions. E.g. a single movie containing
// multiple qualities of the same video (Microsoft Smooth Streaming file)
throw new RuntimeException("The startTime has already been corrected by another track with SyncSample. Not Supported.");
}
startTime = correctTimeToSyncSample(track, startTime, false);
endTime = correctTimeToSyncSample(track, endTime, true);
timeCorrected = true;
}
}
for (Track track : tracks) {
long currentSample = 0;
double currentTime = 0;
long startSample = -1;
long endSample = -1;
for (int i = 0; i < track.getDecodingTimeEntries().size(); i++) {
TimeToSampleBox.Entry entry = track.getDecodingTimeEntries().get(i);
for (int j = 0; j < entry.getCount(); j++) {
// entry.getDelta() is the amount of time the current sample covers.
if (currentTime <= startTime) {
// current sample is still before the new starttime
startSample = currentSample;
}
if (currentTime <= endTime) {
// current sample is after the new start time and still before the new endtime
endSample = currentSample;
} else {
// current sample is after the end of the cropped video
break;
}
currentTime += (double) entry.getDelta() / (double) track.getTrackMetaData().getTimescale();
currentSample++;
}
}
movie.addTrack(new CroppedTrack(track, startSample, endSample));
}
IsoFile out = new DefaultMp4Builder().build(movie);
response.setHeader("content-type", "video/mp4");
out.getBox(Channels.newChannel(response.getOutputStream()));
| | public static void | main(java.lang.String[] args)
Movie movie = MovieCreator.build(new FileInputStream(new File("/home/sannies/CSI.S13E02.HDTV.x264-LOL.mp4")).getChannel());
Server server = new Server(8080);
server.setHandler(new ServeMp4(movie));
server.start();
server.join();
|
|
