Speed up a multiple video files in a one project I have 7 video files, which I need to speed up to 10 times and render as 1 videofile. The problem is when I add effect->speed control to each file, there are huge gaps with last frame between splits.
For example 1st video is 10 min. I set multiple to 10. In a render it played 1 min fast (as I expected) but the last 9 min is a one damn last frame. 
How to make proper speeded video with a few splits? Maybe I need to manualy calculate acelerated length after which delete unwanted trash? 
Please help me. Thank you.
Try grouping all of the clips into a meta-strip with CTRL+G then apply the speed effect to that meta-strip.