I wanted to figure out a way to quickly and easily combine an image file (jpg) and audio file (mp3) into a video file (mov) using the free media converter tool ffmpeg.  This would allow me to upload my podcast episodes and songs to YouTube.  After extensive googling and testing I found the combination that finally worked.  And since I’m such a nice dude, I’ll share it with you:

Youtube trick.

Source: Combine Image File and Audio File Into Video – avconv / ffmpeg