I'm trying to make a timelapse video. I do have all the shots (6500) and would like to make a short 30 FPS video (max 30 seconds). 6500 shots at 30 FPS makes a 200 seconds video more or less.

If I use fewer pictures I end up with frames containing people that appear only on single frames.

What I would like to do is to use all images and sort of blend them together, so that the person is visible on more frames.

For instance, let's say a set of 10 images. Dude1 is present on pictures 1-5 and dude 2 is present on pictures 3-10. My desire is that both guys are present in the same frame.

Also something like a "persisting frame" effect would be interesting, so that each frame is overlaid on the next frames for a fraction of a second.

Is there any software that can do this?

I'm on a PC.

  • yes, I have already seen those. the software that is used normally does not have the functionality I need. (virtual dub, etc..) – sharkyenergy Oct 1 '15 at 8:26
  • 3
    I think you need to use something like ImageMagik (a command line program that can be scripted) to blend sets of 7 frames together into a single image, then you can use VirtualDub etc. to create the video. – Matt Grum Oct 1 '15 at 10:18
  • 2
    I'm afraid the functionality you need isn't automatic : AFAIK, blending multiple pictures while keeping person A from image 1 and person B from image 7 has to be done manually, unless they are not moving (then for each pixel you could keep the more "frequent" color of the 7 colors from the 7 images... Of course the pictures have to be aligned). Anyway, Matlab can do all of that :) – Olivier Oct 1 '15 at 17:49
  • 1
    @JPhi1618 One should be able to accomplish this relatively easily with any program that supports both layers and a fair bit of automatisation (e.g. After Effects with Extended Script). However, this question definitely would be suited best for video.stackexchange.com . – flolilo Sep 13 '18 at 21:21

This is a video question, let's see what is the future of it.

  1. Backup your photos.

  2. Resample them to a manageable size. I would batch resample them with a bit of sharpening using IrfanView. https://www.irfanview.com/ I would use 1920 px on the base. You can also crop it to a FullHD aspect ratio.

  3. Make a video. I would use Virtual Dub, http://virtualdub.sourceforge.net/ probably using Xvid Codec or something similar https://www.xvid.com/. It takes the first numbered image and loads the rest as an image sequence. Set the framerate and save this as V0.

Some math

6500photos / 30fps = 216seconds

216seconds / 30seconds = you need to reduce it by 7

Then we have to do some decisions.

As you have plenty of images I would make a 60FPS video which would look nicer on youtube for example. But the trick is similar.

  1. On the framerate of virtual dub you can decimate the video by 2, 3 or x number. Let's say you choose to use a 60fps frame rate. You need to decimate the video by 3. Save this version as V1.

  2. Open V0 and drop the very first frame of it. Decimate by 3 again and save as V2.

  3. Repeat: open, drop 2 initial frames and save as V3.

Take a video editor that can use layered videos. One free is Davinci Resolve and another one is HitFilmExpress.

  1. Stack the V1, V2, and V3 with a transparency of let's say 33.3%

  2. Done. You have 3 images stacked on each other on a time-lapse video.

It would be interesting to play with different transparency to somehow simulate different "persistent images" More opacity to V2 and a small one on V1 and V3 or something like that.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.