This is script2-variables.sh, which you can download here This simple Bash script produces the same output as the command string above. Into a script like the one shown in Figure 1 (below).įigure 1.

Specifically, you’ll learn how to convert a command string like this:įfmpeg -y -i input.mp4 -c:v libx264 -vf scale=-1:1080 -b:v 3M -maxrate 6M -bufsize 6M -g 48 -preset ultrafast output.mp4 In this tutorial, you’ll learn how to create and run such scripts with PowerShell and Bash.

While you can’t use these scripts in the Windows Command window, you can use Microsoft PowerShell in Windows and Bash on Linux and the Mac. Using variables and “for loops” in a command string simplifies the reuse of existing scripts and helps automate their operation. Attempting to reuse that command line for different files or parameters is often an error-prone experience of searching, copying, and pasting and then rinsing and repeating to correct any missteps.

Most FFmpeg users start by creating a simple static command line which, after much debugging, works just fine for the single input file and selected encoding parameters. You can find an introduction to FFmpeg encoding with downloadable scripts here. Its About page describes the command-line tool as “the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created.” Capable of running on Linux, Mac OS X, Windows, and a range of other build environments, FFmpeg 5.1.2 is available for download at. FFmpeg was designed as a cross-platform solution for video and audio recording, conversion, and streaming.

Powershell ffmpeg