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Using Virtual Dub With Time-Lapse Video Recordings

You can use VirtualDub (free!) to change the frame-rate for playback to anything you like. http://virtualdub.sourceforge.net/

Step 1 – load the video
Step 2 – in either “Full Processing” (you’re changing compression also) or “Direct Stream Copy” (you’re just changing the frame rate) modes, under the “Video” menu select “Frame Rate”
Step 3 – Under “Source Rate Adjustment” select the second radio button, “Change frame rate to (fps) and enter the desired frame rate. For time-lapse recorded stuff, selecting a slow frame rate of 1 frame per second or so will produce slide-show-like results. Move to higher numbers to speed up the playback.
Step 4 – Process all frames. Click “OK”
Step 5 – Under “File” select “Save as AVI” and re-save the video with the new frame rate for playback with a different descriptive filename (filename1fps, for instance)

Now you’ll have a time-lapse movie that outputs nicely. For really long intervals (like 10 minutes between frames), you can instead opt to output each frame as a separate “movie” to be loaded into an editor to allow cross-fading between every frame. VirtualDub does not have support for adding in transitions – I’ve only done such a thing in Windows Movie Maker.

Step 1 – load the video
Step 2 – Under “File” select “Save Segmented AVI”
Step 3 – Check the box “Limit number of video frames per segment” and enter “1” there.
Step 4 – Set “File segment size limit in MB (50-2048) to 50.
Step 5 – select/create a folder to hold all the created segments.
Step 6 – Click “Save”

Or, alternatively, you can output all your frames as bitmap, jpeg (recommended), png or Targa images to use in Windows Photo Story 3, Quicktime Pro or another slide-show creation program to create a slide-show with transitions.

Step 1 – load the video
Step 2 – Under “File” select “Export ==> Image Sequence”
Step 3 – Under “Filename” enter a base filename – each frame will add a number to that base filename
Step 4 – Click on the radio button for the format you want to export the frames as and, if applicable, set the quality slider all the way to the right.
Step 5 – click the box with three dots … and select your target directory (this directory must already be created).
Step 6 – Click OK

Now the folder of images can be imported into Photo Story 3 or dropped into Quicktime Pro with transitions added.

I hope this was clear and precise enough to be helpful.


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