I've taken footage of sunsets and traffic etc and would like to make my hour long footage last only 30secs or so, what software can I use to perform this. Thank you for your time. Phil
Kdenlive also has a video speed effect.
You could use
slowmoVideo for the purpose.
The description of the software from their site:
"slowmoVideo is an OpenSource program that creates slow-motion videos from your footage. But it does not simply make your videos play at 0.01× speed. You can smoothly slow down and speed up your footage, optionally with motion blur."
You can find the latest Ubuntu build of this application at:
Just use ffmpeg - GUI programs always get outdated almost instantly
ffmpeg -i [input video] -filter:v "setpts=[RATIO]*PTS" [output video]
Here you have to replace [RATIO] with the number you get by dividing the duration (in seconds) of the output video with the duration of the input video. So if your traffic video original file is named traffic.webm and you want to name your output traffic-timelapse.webm the command would be (note that 30/(60*60) = 0.0008333 ):
ffmpeg -i traffic.webm -filter:v "setpts=0.0008333*PTS" traffic-timelapse.webm