title: Add static images to MP4 container using MediaMuxer
body: <p>The MP4 container apparently supports including static images on tracks. I was not able to determine whether Android's MediaMuxer was capable of supporting this. I could encode the images as part of video encoding processing that I carry out using MediaCodec, but I would prefer to add the images during the muxing stage.</p>
  <p>It should be noted that I'm using mp4 as a video. But logically, I' guessing that it should be possible to define an image track and insert static images that are rendered at their respective presentation times.</p>
  <p>Is this possible using the MediaMuxer?</p>