Created by: kylemcdonald
I added an example that shows how to do something I was having trouble with.
I had a left and right audio file that had slightly different time offsets, and I wanted to merge them with a video file without re-encoding the video file. Using the 'join' filter instead of .concat took me a bit to figure out, as did 'asetpts' and shortest=None to keep the length from going over the video duration.
I added a graph image, but I don't think it will appear in the readme until the pull request is merged.