Is there any software under active development that provides me with a simple GUI to combine an audio file with an image file to create a resulting video file that I can upload, e.g. to YouTube?
I know there are simple command-line options but still, I prefer a graphical user interface where I can visually drop the files. :-)
Kdenlive! ☺ Awesome tool to edit video. Simple to understand. You may have to add their repository to have the latest version. In this thread you have a list of video editing software for Linux. I've tried a lot, and the one that has worked best always has been Kdenlive.
An embedded album cover in an audio file is the most common example of what you want. You can check with ffprobe - part of ffmpeg - that the embedded image is the "video" track of the file.
A video player like mpv plays the audio with the image as a still image, which I assume is what you want.
Therefore, the easiest answer is to treat your image like an album cover and handle the task with one of the music tagger programs. I would recommend EasyTAG for this.You can drag and drop the image file to the highlighted audio file and save the results.
