If someone has sent you an AVI file with Cinepak compression, you may find that ImageJ/FIJI and other contemporary software cannot read the AVI file.
There are two plugins that attempt to address this for ImageJ:
But I found neither of them to work for me on the particular AVI Cinepak video I was given.
Instead, I used FFMPEG to convert to a more modern widely-compatible Motion JPEG format by typing:
ffmpeg -i video1990s.avi -vcodec mjpeg -qscale 1 test.avi
If you need no loss, you can do uncompressed AVI, but note the output file size could be a factor of 10 larger than the Cinepak version:
ffmpeg -i video1990s.avi -vcodec rawvideo out.avi
You can compress to LOSSLESS FFV1 by typing:
ffmpeg -i video1990s.avi -vcodec ffv1 out.avi
You can also convert the AVI to a series of PNG images.