@Test
public void testEncryptDecryptFragmentedMp4() throws Exception {
SecretKey sk =
new SecretKeySpec(new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, "AES");
Movie m =
MovieCreator.build(
CencTracksImplTest.class.getProtectionDomain().getCodeSource().getLocation().getFile()
+ "/com/googlecode/mp4parser/authoring/samples/1365070268951.mp4");
List<Track> encTracks = new LinkedList<Track>();
for (Track track : m.getTracks()) {
encTracks.add(new CencEncryptingTrackImpl(track, UUID.randomUUID(), sk));
}
m.setTracks(encTracks);
Mp4Builder mp4Builder = new FragmentedMp4Builder();
Container c = mp4Builder.build(m);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
c.writeContainer(Channels.newChannel(baos));
c.writeContainer(new FileOutputStream("output.mp4").getChannel());
Movie m2 = MovieCreator.build(new MemoryDataSourceImpl(baos.toByteArray()));
List<Track> decTracks = new LinkedList<Track>();
for (Track track : m2.getTracks()) {
decTracks.add(new CencDecryptingTrackImpl((CencEncyprtedTrack) track, sk));
}
m2.setTracks(decTracks);
c = mp4Builder.build(m2);
c.writeContainer(new FileOutputStream("output2.mp4").getChannel());
}
public static void main(String[] args) throws IOException {
Movie video =
MovieCreator.build(
Channels.newChannel(
Mp4WithAudioDelayExample.class.getResourceAsStream("/count-video.mp4")));
Movie audio =
MovieCreator.build(
Channels.newChannel(
Mp4WithAudioDelayExample.class.getResourceAsStream("/count-english-audio.mp4")));
List<Track> videoTracks = video.getTracks();
video.setTracks(new LinkedList<Track>());
List<Track> audioTracks = audio.getTracks();
for (Track videoTrack : videoTracks) {
video.addTrack(new AppendTrack(videoTrack, videoTrack));
}
for (Track audioTrack : audioTracks) {
audioTrack.getTrackMetaData().setStartTime(10.0);
video.addTrack(audioTrack);
}
IsoFile out = new DefaultMp4Builder().build(video);
FileOutputStream fos = new FileOutputStream(new File(String.format("output.mp4")));
out.getBox(fos.getChannel());
fos.close();
}
@Override
void executeExample() throws IOException {
String audioEnglish = EXAMPLE_ROOT + "/count-video.mp4";
Movie countVideo = MovieCreator.build(audioEnglish);
TextTrackImpl subTitleEng = new TextTrackImpl();
subTitleEng.getTrackMetaData().setLanguage("eng");
subTitleEng.getSubs().add(new TextTrackImpl.Line(5000, 6000, "Five"));
subTitleEng.getSubs().add(new TextTrackImpl.Line(8000, 9000, "Four"));
subTitleEng.getSubs().add(new TextTrackImpl.Line(12000, 13000, "Three"));
subTitleEng.getSubs().add(new TextTrackImpl.Line(16000, 17000, "Two"));
subTitleEng.getSubs().add(new TextTrackImpl.Line(20000, 21000, "one"));
countVideo.addTrack(subTitleEng);
TextTrackImpl subTitleDeu =
SrtParser.parse(new FileInputStream(new File(EXAMPLE_ROOT + "/count-subs-deutsch.srt")));
subTitleDeu.getTrackMetaData().setLanguage("deu");
countVideo.addTrack(subTitleDeu);
Container out = new DefaultMp4Builder().build(countVideo);
FileOutputStream fos = new FileOutputStream(new File(EXAMPLE_ROOT + "/output.mp4"));
FileChannel fc = fos.getChannel();
out.writeContainer(fc);
fos.close();
}
public static void main(String[] args) throws IOException {
String audioEnglish =
RemoveSomeSamplesExample.class.getProtectionDomain().getCodeSource().getLocation().getFile()
+ "/count-english-audio.mp4";
Movie originalMovie = MovieCreator.build(new FileInputStream(audioEnglish).getChannel());
Track audio = originalMovie.getTracks().get(0);
Movie nuMovie = new Movie();
nuMovie.addTrack(
new AppendTrack(
new CroppedTrack(audio, 0, 10),
new CroppedTrack(audio, 100, audio.getSamples().size())));
Container out = new DefaultMp4Builder().build(nuMovie);
FileOutputStream fos = new FileOutputStream(new File("output.mp4"));
out.writeContainer(fos.getChannel());
fos.close();
}
/**
* all the trimming happens in this method.
*
* <p>STEP A ==>> For each track in the video, we first get the start time for all the tracks.
*
* <p>STEP B ==>> For each track in the video, we crop the tracks with a 'start time' and 'end
* time' and add it to the Movie object.
*
* <p>STEP C ==>> Finally write the newly created movie to the disk.
*/
private String cropSelectedVideo() {
FileInputStream fileInputStream = null;
FileChannel fileChannel = null;
try {
File videoFile = new File(mFullPathToVideoFile);
fileInputStream = new FileInputStream(videoFile);
fileChannel = fileInputStream.getChannel();
Movie movie = MovieCreator.build(fileChannel);
if (movie == null) {
return null;
} else {
List<Track> tracks = movie.getTracks();
movie.setTracks(new LinkedList<Track>());
boolean timeCorrected = false;
if ((tracks == null) && (tracks.size() <= 0)) {
return null;
} else {
/**
* 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 fragment is exactly the such a
* frame.
*/
for (Track track : tracks) {
if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {
if (timeCorrected) {
/**
* This exception here can be false position in case we have multiple tracks with
* sync sample at exactly the same position. E.g. a single movie containing multiple
* qualities of the same video.
*/
} else {
mStartTime = correctTimeToNextSyncSample(track, mStartTime, false);
mEndTime = correctTimeToNextSyncSample(track, mEndTime, true);
timeCorrected = true;
}
}
}
for (Track track : tracks) {
long currentVidSample = 0;
double currentTime = 0;
long startVidSample = -1;
long endVidSample = -1;
for (int i = 0; i < track.getDecodingTimeEntries().size(); i++) {
TimeToSampleBox.Entry myEntry = track.getDecodingTimeEntries().get(i);
for (int j = 0; j < myEntry.getCount(); j++) {
// I am trying to find the start time and end time when the trimmimg occurs
if (currentTime <= mStartTime) {
// our current video sample is before the starting time for the crop
// if the startVidSample is equal to the length of the video,
// an error happened, and we should throw an exception
startVidSample =
currentVidSample; // the new begining of the video will be set to this place
// of the video
} else if (currentTime <= mEndTime) {
// our current video sample is after the starting time for the crop
// but before the end time of the crop
endVidSample =
currentVidSample; // the new end of the video will be set to this place of the
// video
} else {
// our current video sample is after the end time of the cropping
// we just stop this this loop
break;
}
// getDelta() : the amount of time the current video sample covers
currentTime +=
(double) myEntry.getDelta() / (double) track.getTrackMetaData().getTimescale();
currentVidSample++;
}
}
movie.addTrack(new CroppedTrack(track, startVidSample, endVidSample));
}
}
}
IsoFile isoFile = new DefaultMp4Builder().build(movie);
/** STEP C ==>> After we created the Movie, we have to place it into a nonvolatile memory. */
return Util.placeFileInNonVolatileDrive(isoFile, mVideFolderPath, "trim_output");
} catch (Exception e) {
Log.e(TAG, "IO ERROR: " + e);
} finally {
if (fileInputStream != null) {
try {
fileInputStream.close();
} catch (IOException e) {
Log.e(TAG, "IO ERROR: " + e);
}
}
if (fileChannel != null) {
try {
fileChannel.close();
} catch (IOException e) {
Log.e(TAG, "IO ERROR: " + e);
}
}
}
return null;
}
