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Get Keyframe interval (GOP size) of a stream/video using ffprobe
ffprobe -of compact -select_streams v -show_packets [VIDEO_FILE OR STREAM_URL] | grep K$ | awk 'BEGIN{FS="|";last=-1}{split($5,a,"="); if(last != -1) {print "Keframe pos: " a[2] ", Interval: " a[2]-last " seconds"} else {print "Keyframe: " a[2]}; last=a[2]}'
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