如何在播放之前/之后获得视频时长

Question

videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
            {
              @Override
              public void onCompletion(MediaPlayer mp) 
              {
                  VideoView videoView = (VideoView) findViewById(R.id.videoView1);
                  long duration= videoView.getDuration();

                  Toast.makeText(getApplicationContext(), "Video completed", Toast.LENGTH_LONG).show();
                  mShimmerDevice.stopStreaming();   
                  mShimmerDevice.stop();

              }

            });
       }

虽然此代码仅在视频播放完毕后才有效

Answer 1

您可以使用MediaMetadataRetriever。这样，您可以在不加载/播放视频的情况下检索有关视频的信息。

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

Answer 2

您可以在onPrepared()方法内进行视频开始播放之前获取视频的持续时间：

    //called when the mediaplayer is prepared to start buffering
    videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mediaPlayer) {
            Log.i("tag","video length:" +mediaPlayer.getDuration());

                }
    });

Answer 3

您还可以使用FFmpegMediaMetadataRetriever：

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