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我想比特率,採樣率,一個音頻文件嘗試獲得比特率,採樣率,信道計數
我使用代碼
@SuppressLint("NewApi")
public void GetSampleRate(String path)
{
MediaExtractor mex = new MediaExtractor();
try {
mex.setDataSource(new File(path).getAbsolutePath());// the adresss location of the sound on sdcard.
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
MediaFormat mf = mex.getTrackFormat(0);
bitRate = mf.getInteger(MediaFormat.KEY_BIT_RATE);
sampleRate = mf.getInteger(MediaFormat.KEY_SAMPLE_RATE);
channelCount = mf.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
}
的信道計數但是當編譯器來上這條線
mex.setDataSource(new File(path).getAbsolutePath());
logcat顯示一個錯誤
10-13 12:57:52.772: E/WVMExtractor(9554): Failed to open libwvm.so: dlopen failed: library "libwvm.so" not found
然後當我嘗試獲取bitRate,sampleRate,channelCount時出現此錯誤。
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
感謝您的回覆。但我怎麼能libwvm.so我搜索這個,但找不到任何東西 –