description, seek=true, duration=40
seek, name=Forward-seek,       playback-time=0.0,    rate=1.0, start=5.0,             flags=accurate+flush
seek, name=Backward-seek,      playback-time=10.0,   rate=1.0, start=0.0,             flags=accurate+flush
seek, name=Backward-seek,      playback-time=5.0,    rate=1.0, start=25.0, stop=-1,   flags=accurate+flush
seek, name=Backward-seek,      playback-time=30.0,   rate=1.0, start=0.0,             flags=accurate+flush
seek, name=Forward-seek,       playback-time=5.0,    rate=1.0, start=15.0,            flags=accurate+flush
seek, name=Forward-seek,       playback-time=20.0,   rate=1.0, start=35.0,            flags=accurate+flush
seek, name=Backward-seek,      playback-time=40.0,   rate=1.0, start=25.0,            flags=accurate+flush
seek, name=Last-backward-seek, playback-time=30.0,    rate=1.0, start=5.0,  stop=10.0, flags=accurate+flush
