SELECT t1.s AS event, t2.o AS duration 
FROM "prop_requestSystemCallComponent" AS t1,  
	   "prop_eventHasDurationToNextOccurrence" AS t2
WHERE t1.o = 'gst_ffmpegdec_frame_Decoded' 
  AND t1.s = t2.s 
  AND t2.o > 50000000