Requirement: ffmpeg

This bash script will:

1. search av files in given folder
2. create a new folder for mp4, folder name will be [given-folder]-mp4
3. convert each av files in given folder, adding .mp4 at the end of file's name, and put them in new folder

Usage: $ ./av2mp4.sh [foldername]

For Example: $ ./av2mp4.sh 2021-08-15 ... $ ls | grep 2021-08-15 2021-08-15 2021-08-15-mp4

av files are raw h264