Android: Read and Write .mp4 metadata -Tag

Question

I want to read and edit(Write) the mp4 metadata. Particularly I want to read/write Tag metadata in android as shown in below picture.

I searched for this on internet and found mp4Parser, but I think mp4Parser don't write Title Keyword.

For .jpg file we use XPKeyword metadata which represents title. So same way how to do same for .mp4 file.

Answer 1

The Android SDK contains the class MediaMetadataRetriever to retrieve all the metadata values inside your file, you can read more about MetaData values here.

public void readMetaData() {
    File sdcard = Environment.getExternalStorageDirectory();
    File  file = new File(sdcard,"/Android/data/myfile.mp4");

    if (file.exists()) {
        Log.i(TAG, ".mp4 file Exist");

        //Added in API level 10
        MediaMetadataRetriever retriever = new MediaMetadataRetriever();
        try {
            retriever.setDataSource(file.getAbsolutePath());
            for (int i = 0; i < 1000; i++){
                //only Metadata != null is printed!
                if(retriever.extractMetadata(i)!=null) {
                    Log.i(TAG, "Metadata :: " + retriever.extractMetadata(i));
                }
            }
        } catch (Exception e) {
            Log.e(TAG, "Exception : " + e.getMessage());
        }
    } else {
        Log.e(TAG, ".mp4 file doesn´t exist.");
    }
}

To edit/write metadata, Android SDK doesn´t have any method, probably by copyright issues, but you can use options like:

https://github.com/sannies/mp4parser

http://multimedia.cx/eggs/supplying-ffmpeg-with-metadata/

https://github.com/bytedeco/javacv/blob/master/src/main/java/org/bytedeco/javacv/FFmpegFrameRecorder.java