How can I use ffmpeg to extract a specific frame from a video file?

To extract a specific frame from a video file using ffmpeg, you can use the command:

ffmpeg -i input.mp4 -vf "selecteq(n,framenumber)" -vsync vfr output.jpg

Replace input.mp4 with the name of your video file, and framenumber with the specific frame number you want to extract. This command will save the extracted frame as output.jpg.