Open Allansk2 opened 6 years ago
@Allansk2 Ever figure this out? Also the video that is created, is it H264 codec or MPEG4?
@avanibhatnagar
try {
Movie orig_movie = MovieCreator.build(videoInput);
File audioFile = new File(audioPath);
AACTrackImpl aacTrack = new AACTrackImpl(new FileDataSourceImpl(audioFile));
//get duration of video
IsoFile isoFile = new IsoFile(videoPath);
double lengthInSeconds = (double)
isoFile.getMovieBox().getMovieHeaderBox().getDuration() /
isoFile.getMovieBox().getMovieHeaderBox().getTimescale();
Track track = (Track) orig_movie.getTracks().get(0);
Track audioTrack = (Track) aacTrack;
double startTime1 = 0;
double endTime1 = lengthInSeconds;
boolean timeCorrected = false;
if (audioTrack.getSyncSamples() != null && audioTrack.getSyncSamples().length > 0) {
if (timeCorrected) {
throw new RuntimeException("The startTime has already been corrected by another track with SyncSample. Not Supported.");
}
startTime1 = correctTimeToSyncSample(audioTrack, startTime1, false);
endTime1 = correctTimeToSyncSample(audioTrack, endTime1, true);
timeCorrected = true;
}
long currentSample = 0;
double currentTime = 0;
double lastTime = -1;
long startSample1 = -1;
long endSample1 = -1;
for (int i = 0; i < audioTrack.getSampleDurations().length; i++) {
long delta = audioTrack.getSampleDurations()[i];
if (currentTime > lastTime && currentTime <= startTime1) {
// current sample is still before the new starttime
startSample1 = currentSample;
}
if (currentTime > lastTime && currentTime <= endTime1) {
// current sample is after the new start time and still before the new endtime
endSample1 = currentSample;
}
lastTime = currentTime;
currentTime += (double) delta / (double) audioTrack.getTrackMetaData().getTimescale();
currentSample++;
}
CroppedTrack cropperAacTrack = new CroppedTrack(aacTrack, startSample1, endSample1);
Movie movie = new Movie();
movie.addTrack(track);
movie.addTrack(cropperAacTrack);
Container mp4file = new DefaultMp4Builder().build(movie);
FileChannel fc = new FileOutputStream(new File(output)).getChannel();
mp4file.writeContainer(fc);
fc.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static double correctTimeToSyncSample(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.getSampleDurations().length; i++) {
long delta = track.getSampleDurations()[i];
if (Arrays.binarySearch(track.getSyncSamples(), currentSample + 1) >= 0) {
timeOfSyncSamples[Arrays.binarySearch(track.getSyncSamples(), currentSample + 1)] = currentTime;
}
currentTime += (double) delta / (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];
}
When I have to trim the 6-sec video like startTime on 1sec and endTime 5sec then getSyncSamples give the timeOfSyncSample always 0.0
Hey @vijendrapatidar. It is a bit late but were you able to solve your problem here?
Does anyone know how to trim a video with the library. I find some solution in stackoverflow, but it always return the video from 0 second to 15 second, not matter what startMs and endMs. Does anyone know how to fix it? Thanks!