How can I use ffmpeg to convert an MP4 video file to the WebM format?

To convert an MP4 video file to the WebM format using ffmpeg, you can use the following command in the terminal:

ffmpeg -i input.mp4 -c:v libvpx -crf 10 -b:v 1M -c:a libvorbis output.webm

This command will take the input.mp4 file and convert it to output.webm in the WebM format.