Use framework speed adjustment where possible (e.g., API 23+)

I have used ConcatenatingMediaSource to play videos one by one. I am working on video editing app. There is speed changes feature also. I have set speed 0.5 for 1st video, then 1 for 2nd video and 4 for 3rd video. It is working fine when I play video from specific position using player.seekTo(currentPosition, C.TIME_UNSET). But When play video one by one then its take time to change speed. 1st video play at speed 0.5 and then 1st video plays end and 2nd start playing it will play for 0 - 1 second at speed of 0.5 then play at speed of 1.
Please guide me handle it.

[andrewlewis]

This report sounds the same as #6649. The underlying problem is that we speed up/slow down audio before writing it to the AudioTrack, but this means that on a speed change the track's buffer has to drain before the new speed takes effect.

As a hacky workaround for the short term, you could use a timed message (#2189) to set playback speed one second before the end of a track.

For #6649 the enhancement being tracked is to support setting playback parameters at a given position, which would allow us to take into account the audio track latency. However, we're now considering an alternative fix which is to switch to using framework speed adjustment (from API 23) instead of modifying the audio ourselves, which has the major advantage that the speed adjustment happens in the mixer, eliminating most of the delay. Let's use this issue to track using framework speed adjustment where possible, and I'll also leave the other issue open in case we run into problems with this option.