To easily convert a MP4 video into a GIF image, you can use ffmpeg and ImageMagick convert in Linux. First, you extract the video into frames in JPEG with ffmpeg. Second, you join all JPEG frames into a single GIF image with ImageMagick convert. I use MP4 format as example but you may use another as long as it is supported by ffmpeg. Below I explain the steps.
Extract the Video
- Create a folder named frames in the same directory with your MP4 file.
- Use command ffmpeg -i video_file_name.mp4 -r 5 'frames/frame-%03d.jpeg'. For example, see picture below.
- Check frames folder. It should contains all frame images from the MP4. How many, it depends on your video size.
Join All Frames
- Use command convert frames/frame*.jpeg output.gif.
- You get your GIF named output.gif in the same directory with your MP4. How long the process, depends on your processor.
- -r 5 in ffmpeg is option for FPS value. Bigger means better quality, but slow. Smaller means lower quality, but faster.
- %03d is a variable for sequential number. It gives your JPEG frames sequential filename numbers in decimal form.
- The convert command above is intended to unite all sequential JPEG images into single GIF image.
- You may modify commands above my reading man ffmpeg and man convert to suite your needs. You will get many examples to try. Explore them yourself.