Read mp3 metadata from assets folder

Question

I have an app with some mp3 files stored inside a subfolder of assets folder. I obtain list of files in this way

context.getAssets().list("audio");

and results show it inside a listview. By doing this, what i see is a list of mp3 filenames. Now i don't want show filenames, but associated metadata for each file.

score 3 · Answer 1 · answered Jan 26 '15 at 21:52

Copying the file to disk isn't necessary. MediaMetadataRetriever and FFmpegMediaMetadataRetriever both offer a setDataSource method that takes a FileDescriptor as an argument:

FFmpegMediaMetadataRetriever metaRetriver = new FFmpegMediaMetadataRetriever();\
// or MediaMetadataRetriever metaRetriver = new MediaMetadataRetriever();

String path = "audio";

String [] files  = context.getAssets().list(path);

for (int i = 0; i < files.length; i++) {
    String file = path + "/" + files[i];

    AssetFileDescriptor afd = context.getAssets().openFd(file);

    metaRetriver.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());

    String album = metaRetriver.extractMetadata(FFmpegMediaMetadataRetriever.METADATA_KEY_ALBUM);
    String artist = metaRetriver.extractMetadata(FFmpegMediaMetadataRetriever.METADATA_KEY_ARTIST);
    String gener = metaRetriver.extractMetadata(FFmpegMediaMetadataRetriever.METADATA_KEY_GENRE);

    afd.close();
}

metaRetriver.release();

score 0 · Accepted Answer · edited May 23 '17 at 12:22

0

Here you go. First get the file path as shown here

How to pass a file path which is in assets folder to File(String path)?

And then get metadata of audio as shown here

How to extract metadata from mp3?

edited May 23 '17 at 12:22

Community

1
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answered Jan 25 '15 at 09:49

Noman Rafique

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but in this way i copy file from asset folder to another folder into device storage, occupying double disk space. So if i have 20 MB of mp3 inside assets, after copy i occupy another 20 mb of storage, and i would avoid this – giozh Jan 25 '15 at 10:14
After getting metadata delete the file and pick next one and so one ;-) – Noman Rafique Jan 25 '15 at 10:23
This isn't the best approach, see my answer. – William Seemann Jan 26 '15 at 21:53

score 0 · Answer 3 · answered Jan 25 '15 at 09:51

By metadata means name, title, time etc data if you want then you need to use MediaMetadataRetriever class to do so..

MediaMetadataRetriever metaRetriver = new MediaMetadataRetriever();
metaRetriver.setDataSource("path of song");
String album = metaRetriver.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);

String artist = metaRetriver
    .extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);
String gener=metaRetriver
                .extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE);

Similarly you can extract other data also..
Hope it will help you.

Read mp3 metadata from assets folder

3 Answers3