Seek not work with m3u8 video

[ShoWerZen]

I play a Hls m3u8 file.
And I want to seek the video to next part.
My code:

int seekTime = playingPart.Position.Subtract(videoPlayer.CurrentTime).Seconds; videoPlayer.Seek(seekTime);

seekTime is 25
But the video didn't seek forward.

[adamfisher]

Seek time is the amount of time you want to move forward in the playback stream (i.e. it is not a timeline position). So specifying 25 should increase the playback position by 25 seconds from its current time. The ability to seek on a m3u8 file is also determined by the compatibility of MediaPlayer on Android and AVPlayerViewController on iOS (the native video player used on each platform).