In this recipe, we will create a simple video converter using Qt and FFmpeg, a leading multimedia framework that is free and open source. Although Qt does support playing video files through its widget, it does not support video conversion at the moment. Fear not! You can actually still achieve the same goal by making your program cooperate with another standalone program through the
QProcess class provided by Qt.
Let's make a simple video converter with the following steps:
Download FFmpeg (static package) from http://ffmpeg.zeranoe.com/builds and extract the contents to
Then, open up Qt Creator and create a new Qt Widgets Application project by going to File | New File or Project….
After that, open up
mainwindow.uiand we're going to work on the program's user interface. Its UI is very similar to the previous example, except we add an extra text edit widget to the canvas, just below the combo box: