My question is much like the one described in this post: Cant append to video in Android, only have been unable to use an updated jar to fix my problem (I am currently using is isoviewer-1.0-RC-26). The following is my code:
private Uri concatenateMP4() {
try {
FileChannel fc1 = new FileInputStream(myVid1).getChannel();
FileChannel fc2 = new FileInputStream(myVid2).getChannel();
FileChannel fc3 = new FileInputStream(myVid3).getChannel();
try {
Movie[] inMovies = new Movie[]{
MovieCreator.build(fc1),
MovieCreator.build(fc2),
MovieCreator.build(fc3)
};
List<Track> videoTracks = new LinkedList<Track>();
List<Track> audioTracks = new LinkedList<Track>();
for (Movie m : inMovies) {
for (Track t : m.getTracks()) {
if (t.getHandler().equals("soun")) {
audioTracks.add(t);
}
if (t.getHandler().equals("vide")) {
videoTracks.add(t);
}
}
}
Movie result = new Movie();
if (audioTracks.size() > 0) {
result.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
}
if (videoTracks.size() > 0) {
result.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));
}
Container out = new DefaultMp4Builder().build(result);
String fileNameString = fName+"_"+lName"_"org+System.currentTimeMillis()+".mp4";
File aFile = new File(vidDir,fileNameString);
FileChannel fc = new RandomAccessFile(aFile,"rw").getChannel();
out.writeContainer(fc);
fc.close();
combinedVidUri = addVideo(aFile);
return combinedVidUri;
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return null;
}
I am running this code in an asyncTask so that when the vids are a little bit larger they do not tie up the UI thread. The following is the error that I am getting:
10-01 19:07:01.367 11805-12202/com.myapp.myappProject E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: java.nio.BufferUnderflowException
at java.nio.Buffer.checkGetBounds(Buffer.java:177)
at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:41)
at java.nio.MappedByteBufferAdapter.get(MappedByteBufferAdapter.java:144)
at java.nio.ByteBuffer.get(ByteBuffer.java:384)
at java.nio.channels.Channels$OutputStreamChannel.write(Channels.java:345)
at com.googlecode.mp4parser.AbstractBox.getBox(AbstractBox.java:163)
at com.googlecode.mp4parser.authoring.tracks.AppendTrack.<init>(AppendTrack.java:52)
at com.myapp.myappProject.Submit.concatenateMP4(Submit.java:142)
at com.myapp.myappProject.Submit.access$000(Submit.java:71)
at com.myapp.myappProject.Submit$StartUploadChain.doInBackground(Submit.java:245)
at com.myapp.myappProject.Submit$StartUploadChain.doInBackground(Submit.java:236)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
... 5 more
I know the videos I am attempting to concatenate actually exist and I am fairly certain (both through the above output and through the use of Log statements) that it breaks as it goes to add a new track to the result variable. What am I doing wrong?
The worst part is that I am testing on both a google nexus and a samsung galaxy tab. The nexus works, the galaxy throws the error.
