I'm using a mp4 file(25fps) that shows the frame numbers, that's how I noticed that the player doesn't play the entire movie.
When I let the player play the movie without seeking or using startTime or stopTime all the frames are shown.
But when I use seek, the mediaplayer doesn't play the last frame.
And when I use setStartTime, the player doesn't play the last 2 frames.
An other thing I noticed is that when using the function setStartTime the player starts playing the first frame and then goes to the time given in the setStartTime.