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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
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Unable to merge videos in Android using JavaCV ("Sample Description" Error)
15 décembre 2015, par SanI am creating a video from images via FFMPEG and I am able to get the video from images. I am also making use of JavaCV to merge two videos and I am able to join videos using JavaCV without any issues provided both the videos are taken via camera, i.e, a video actually recorded via mobile camera.
Issue that I’m facing :
I am not able to merge the video that was generated from FFMPEG using the images along with the video user has chosen which will mostly be a video that was not generated and taken via mobile camera.
CODE :
Code to generate Video via Images :FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(path + "/" + "dec16.mp4", 800, 400);
try {
recorder.setVideoCodec(avcodec.AV_CODEC_ID_MPEG4);
//recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
recorder.setVideoCodecName("H264");
recorder.setVideoOption("preset", "ultrafast");
recorder.setFormat("mp4");
recorder.setFrameRate(frameRate);
recorder.setVideoBitrate(60);
recorder.setPixelFormat(avutil.AV_PIX_FMT_YUV420P);
startTime = System.currentTimeMillis();
recorder.start();
for(int j=0;j recorder.getTimestamp()) {
recorder.setTimestamp(t);
recorder.record(image);
}
}
recorder.stop();
} catch (Exception e) {
e.printStackTrace();
}Code to merge Videos :
int count = file_path.size();
System.out.println("final_joined_list size " + file_path.size());
if (file_path.size() != 1) {
try {
Movie[] inMovies = new Movie[count];
mediaStorageDir = new File(
Environment.getExternalStorageDirectory()
+ "/Pictures");
for (int i = 0; i < count; i++) {
File file = new File(file_path.get(i));
System.out.println("fileeeeeeeeeeeeeeee " + file);
System.out.println("file exists!!!!!!!!!!");
FileInputStream fis = new FileInputStream(file);
FileChannel fc = fis.getChannel();
inMovies[i] = MovieCreator.build(fc);
fis.close();
fc.close();
}
List<track> videoTracks = new LinkedList<track>();
List<track> audioTracks = new LinkedList<track>();
Log.d("Movies length", "isss " + inMovies.length);
if (inMovies.length != 0) {
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);
}
if (t.getHandler().equals("")) {
}
}
}
}
Movie result = new Movie();
System.out.println("audio and videoo tracks : "
+ audioTracks.size() + " , " + videoTracks.size());
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()])));
}
IsoFile out = null;
try {
out = (IsoFile) new DefaultMp4Builder().build(result);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
long timestamp = new Date().getTime();
String timestampS = "" + timestamp;
File storagePath = new File(mediaStorageDir
+ File.separator);
storagePath.mkdirs();
File myMovie = new File(storagePath, String.format("%s.mp4", timestampS));
FileOutputStream fos = new FileOutputStream(myMovie);
FileChannel fco = fos.getChannel();
fco.position(0);
out.getBox(fco);
fco.close();
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String mFileName = Environment.getExternalStorageDirectory()
.getAbsolutePath();
// mFileName += "/output.mp4";
File sdCardRoot = Environment.getExternalStorageDirectory();
File yourDir = new File(mediaStorageDir + File.separator);
for (File f : yourDir.listFiles()) {
if (f.isFile())
name = f.getName();
// make something with the name
}
mFileName = mediaStorageDir.getPath() + File.separator
+ "output-%s.mp4";
System.out.println("final filename : "
+ mediaStorageDir.getPath() + File.separator
+ "output-%s.mp4" + "names of files : " + name);
single_video = false;
return name;
} else {
single_video = true;
name = file_path.get(0);
return name;
}
</track></track></track></track>Error :
The Error that I am facing while trying to merge the videos generated via Images and a normal video is
12-15 12:26:06.155 26022-26111/? W/System.err﹕ java.io.IOException: Cannot append com.googlecode.mp4parser.authoring.Mp4TrackImpl@45417c38 to com.googlecode.mp4parser.authoring.Mp4TrackImpl@44ffac60 since their Sample Description Boxes differ
12-15 12:26:06.155 26022-26111/? W/System.err﹕ at com.googlecode.mp4parser.authoring.tracks.AppendTrack.<init>(AppendTrack.java:48)
</init>Fix that I tried :
Google advised me to change the CODEC in JavaCV from
avcodec.AV_CODEC_ID_MPEG4
toavcodec.AV_CODEC_ID_H264
. But when I did that, I am not able to get the video from images thereby throwing the following error :12-15 12:26:05.840 26022-26089/? W/linker﹕ libavcodec.so has text relocations. This is wasting memory and is a security risk. Please fix.
12-15 12:26:05.975 26022-26089/? W/System.err﹕ com.googlecode.javacv.FrameRecorder$Exception: avcodec_open2() error -1: Could not open video codec.
12-15 12:26:05.975 26022-26089/? W/System.err﹕ at com.googlecode.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:492)
12-15 12:26:05.975 26022-26089/? W/System.err﹕ at com.googlecode.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:267)What I need :
Creating video from Images is inevitable and that video will definitely be used to merge with other videos which might have any Codec Formats. So I need to find a way to merge any kind of videos irrespective of their Codecs or any other parameters. I am trying to keep it simple by just using the Jars and SO files and I dont want to drive myself crazy by going on a full scale implementation of FFMPEG Library. That being said, I am also ready to look into that library if I dont have any other ways to achieve what I want but a solid resource with an ALMOST working code would be much appreciated. Cheers.
Update :
I looked upon the issues mentioned at GitHub of OpenCV, but didnt find anything solid from it.
OpenCV Issues