Autoplugging

[Tony Houghton]

I want to write a video player that supports as many formats as
possible but, unlike totem etc, supports vdpau and/or vaapi. I could
hardwire code paths to choose suitable demuxers for mkv, mp4 etc but
what about formats I don't think of in advance?

The manual's chapter on autoplugging basically says the information in
it is inaccurate and outdated and one should just use playbin or
decodebin, but I don't think you can use vdpau or vaapi with those. Even
if the information didn't have that disclaimer, it's distinctly lacking
in implementation details.

Are there any docs buried in the SCM or design documentation that would
help me?