Get Video duration before or without Playing

MediaMetadataRetriever retriever = new MediaMetadataRetriever();
retriever.setDataSource(your_data_source);
String time = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
long timeInmillisec = Long.parseLong( time );

References
https://stackoverflow.com/questions/24014330/how-can-i-get-a-video-duration-before-without-playing