Don't do this. Place both ss and t before the input -i. As output options, ss waits till the first KF after the given value, it's not a seek. With a t of 2, th

Don't do this. Place both ss and t before the input -i. As output options, ss waits till the first KF after the given value, it's not a seek. With a t of 2, that may very well result in an empty video stream.