我想知道是否有办法改变 MediaPlayer 播放数据的采样率。我想对其进行调整并以比编码慢的速度播放数据。想法？
问问题
1638 次
1 回答
0
This might not be doable with MediaPlayer, but for audio you can do it with SoundPool:
The playback rate can also be changed. A playback rate of 1.0 causes the sound to play at its original frequency (resampled, if necessary, to the hardware output frequency). A playback rate of 2.0 causes the sound to play at twice its original frequency, and a playback rate of 0.5 causes it to play at half its original frequency. The playback rate range is 0.5 to 2.0.
You didn't mention this in your original question, but if you want to maintain pitch while changing the frequency, you'd need to provide a pitch-shift algorithm. Perhaps there's one in the android.media.audiofx package - there's a queryEffects() method that might return some type of pitch shifter.
For MediaPlayer, you might look at the attachAuxEffect method that would let you process the audio stream.
于 2013-02-08T19:14:44.267 回答