I strongly recommend against using the Free Video to JPG Converter program mentioned in the other answer. It comes with OpenCandy adware.
Instead, you can use VLC, which is Free Software and comes with no adware nor malware. Install it, then:
- Open a Command Prompt (open Start Menu, type
- Type the path to the vlc.exe file (i.e.
"C:\Program Files (x86)\VideoLAN\VLC\vlc.exe").
- Type the path to your video file (i.e.
- Choose the desired ratio of images to video framerate. For example, if my video is 60fps, and I want 30fps dumped to images, I'd use a ratio of 2. If I wanted 15fps, I'd use 4.
--scene-ratio=2 or whatever ratio you chose.
- Choose a filename prefix for the images and type,
- Choose a directory to put the images in and type,
vlc://quit so VLC will exit when done.
All put together it should look something like this:
"C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" "C:\Users\Me\Videos\video.mp4" --video-filter=scene --vout=dummy --scene-ratio=2 --scene-prefix="prefix" --scene-path="C:\Users\Me\whatever" vlc://quit
You can, of course, copy and paste that into the Command Prompt and then edit it, rather than typing it all out. :)
Enter. VLC will open, run through the video dumping the frames, and exit.
If you want to adjust the framerate ratio, you can delete the images, press the
Up Arrow in the Command Prompt to bring up the command again, then navigate through it using the left/right arrows (use
Ctrl+Left/Right Arrow to move through it faster), change the ratio number, and run the command again.