On Thu, Jun 30, 2011 at 1:05 PM, New Developer <[email protected]> wrote: > I have tried to simplify the process Based on the cycle of > 100 ms play 100ms pause , etc... > handle = new Handler(); > play = new Runnable() { > @Override > public void run() { > if (mMediaPlayer != null) { > mMediaPlayer.setLooping(false); > if (mMediaPlayer.isPlaying() ) mMediaPlayer.pause(); > else mMediaPlayer.start(); > if (mMediaPlayer.getCurrentPosition() < (mMediaPlayer.getDuration() - > 5)) > handle.postDelayed(this, MaxDelay); > } > } > }; > play.run();
That's because you don't change the ratio between playing time and pause time. It is still 1 and changes only slightly when you are moving your slider, to come back to 1, once slider has stopped. Think of a square wave generator: 1 is play time, 0 is pause time. To change the play speed have to change ratio between 1s and 0s rather than the frequency of that wave. what you have done is that the period is getting longer, but the ratio remains the same: 010101 001100110011 000111000111 0000111100001111 ... at some point this will get jerky, if you stop it for longer than our brain can perceive as a smooth sequence of moving pictures. What you need is this: <--1st cycle -><- 2nd cycle-> duration of thee cycle remains constant 111111111111111111111111... normal speed 111111000000111111000000... 2x slow down 111000000000111000000000... 3x slow down 110000000000110000000000... 5x slow down 100000000000100000000000... 10x slow down 000000000000000000000000... full stop It is important to do it often enough, say within a second there should be at least few of those cycles (I think 5 is a good number to start with, which means your cycle should be taking 200milliseconds.This means that playing_time + pausing_time = 200msec. Once you implement that, it should work. Daniel -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
