I need to both reverse a clip and slow it down to exactly 0.5x speed.
I know I could use the Reverse option, but it’s a bit cumbersome to keep these extra “reversed” files around, plus I might lose some quality. So I’d like to do this using the excellent time remapping, if possible.
And, it’s easy enough to reverse a clip using time remapping - zoom keyframe values and then hold CTRL and just flip the start and end keyframes. And voila, a reversed clip!
However, slowing the clip down to exactly 0.5x after that is proving troublesome. I can sort of do it by stretching the clip to double its original length before adding the time remap filter, and then flipping the key frames and stretching them out. However this is all done by eye, and so the resulting exported video looks bad (as my original clip is 60FPS and I want to play it at 30FPS so I need an exact 0.5x slowdown).
Can anyone suggest a way to do this in an exact manner?
A reverse-and-speed-adjust filter that uses the time remapping would be nice
After you set your remapping values, you can watch the “Speed:” status in the time remap filter to see the calculated speed while you preview. The “Speed” status is the value immediately below the white line in the filter UI (above Direction). Those status values are updated for each frame and calculated based on the mapping applied since the previous frame. If the status shows -0.5x, then you know you achieved the speed you want.