How can I use ffmpeg to encode a video file into the VP8 format?

To encode a video file into the VP8 format using ffmpeg, you can use the following command:

ffmpeg -i inputvideo.mp4 -c:v libvpx -b:v 1M outputvideo.webm

This command will take the input video file "inputvideo.mp4" and encode it into the VP8 format with a bitrate of 1 Mbps, saving the output as "outputvideo.webm".