post processing a video to appear as though it is timelaspe

graysky · 2016-02-16 23:47:23

I have seen apple's "slow motion" effect whereby the video stream on the camera is post-processed to a timelaspe effect. I have been googing for an ffmpeg or the like solution to do this myself but am only finding references to doing so with still images. Any oneliners folks care to share to accomplish it?

DrZaius · 2016-02-17 01:56:42

Can you provide links to before and after examples (or at least after)? I just don't quite understand what effect you want to achieve.

Last edited by DrZaius (2016-02-17 01:57:49)

fukawi2 · 2016-02-17 03:38:41

Is this the command you're looking for?

ffmpeg -i input.mp4 -filter:v "setpts=0.5*PTS" -an output.mp4

Source: http://superuser.com/questions/777938/f … -timelapse

EDIT: also: http://superuser.com/questions/600109/m … ring-movie
My Google was "ffmpeg speed up video timelapse"

Last edited by fukawi2 (2016-02-17 03:39:46)

graysky · 2016-02-17 19:31:51

Hey, thanks! I will give it a try. It looks like the apple protocol is to speed up short clips by a factor of 15x and longer ones by 30x or even 60x. Been experimenting:

actual record time (sec),apple timelaspe time (sec),compression
1500,25,60.0
1290,22,58.6
900,30,30.0
466,31,15.0
140,9,15.6
75,5,15.0
15,1,15.0

Arch Linux

#1 2016-02-16 23:47:23

post processing a video to appear as though it is timelaspe

#2 2016-02-17 01:56:42

Re: post processing a video to appear as though it is timelaspe

#3 2016-02-17 03:38:41

Re: post processing a video to appear as though it is timelaspe

#4 2016-02-17 19:31:51

Re: post processing a video to appear as though it is timelaspe

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