If I drag the slider and start playing a video on my Android at any place in the video the audio starts off perfectly in sync with the video but over time gets progessively ahead of the video. Drag the slider to somewhere else and again the audio is again in sync but progessively gets ahead if the video. Pausing the video and resuming play does not resync the audio and video. This is a video that I converted with FFMPEG. What convert setting can I use to keep the audio synced with the video at all times?