* De-centralize some configs to where they are used.
And make default variables.
Renaming a bit, but these are all internal config and have not been
added to documented config.
* Keep documented config as is.
* test
* typo
* Split stream tracker impl from base
* slight re-arrangement of code
* fps based stream tracker
* MinFPS config
* switch back to packet based tracker
* use video config by default to handle sources without type
Raja Subramanian