making a clip slower
Hi, i have a video footage of moving clouds with a length of 8 seconds. But i need it to be around 20 seconds long. So when i try to slow it down with rightclick and time set from 1 to 0.5 in editor timeline it is stretched to a length of 16 seconds. but when i make a composit shot, the clip in timeline is 16 seconds long but the clip is only visible 8 seconds and is not slowed down. how can i slow down the clip? time effect dont work. can you please help me. and sorry for my poor english.