Android去掉视频声音

【Android】使用MediaExtractor、MediaMuxer去掉视频文件中的音频数据_android 去掉视频音频_little_fat_sheep的博客-CSDN博客

 

void removeSound() {try {String path = Environment.getExternalStorageDirectory().getPath();String filename = "no_sound_" + input_path.substring(input_path.lastIndexOf("/") + 1);String output_path = path + File.separator + filename;MediaExtractor mediaExtractor = new MediaExtractor();mediaExtractor.setDataSource(input_path);MediaMuxer mediaMuxer = new MediaMuxer(output_path, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);int input_size = 0;int videoTrackIndex = -1;int count = mediaExtractor.getTrackCount(); //获取轨道数for (int i = 0; i < count; i++) {MediaFormat format = mediaExtractor.getTrackFormat(i);String mime = format.getString(MediaFormat.KEY_MIME);if (mime.startsWith("video/")) { // mp4为"video/avc"input_size = format.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);mediaExtractor.selectTrack(i);videoTrackIndex = mediaMuxer.addTrack(format);break;}}mediaMuxer.start();int sampleSize = 0;MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();ByteBuffer buffer = ByteBuffer.allocate(input_size); //也可以设置为：500*1024while ((sampleSize = mediaExtractor.readSampleData(buffer, 0)) > 0) {info.offset = 0;info.size = sampleSize;info.flags = mediaExtractor.getSampleFlags();info.presentationTimeUs = mediaExtractor.getSampleTime();mediaMuxer.writeSampleData(videoTrackIndex, buffer, info); //写入数据mediaExtractor.advance(); //下一帧}mediaExtractor.release();mediaMuxer.stop();mediaMuxer.release();MediaScannerConnection.scanFile(MainActivity.this, new String[]{ output_path }, null, null);Toast.makeText(getApplicationContext(), "视频生成完成：" + output_path, Toast.LENGTH_SHORT).show();} catch (Exception e) {Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show();Log.e(Thread.currentThread().getStackTrace()[2] + "", e.toString());}
}

选择视频文件

String input_path = "";void chooseFile() {    int CHOOSE_VIDEO = 200;Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);startActivityForResult(intent, CHOOSE_VIDEO);
}@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (resultCode == RESULT_OK) {Uri uri = data.getData();String[] proj = { MediaStore.Video.Media.DATA };Cursor cursor = managedQuery(uri, proj, null, null, null);int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);cursor.moveToFirst();input_path = cursor.getString(column_index);Log.e(Thread.currentThread().getStackTrace()[2] + "", input_path);}
}