* New video transcoder
* Set a smaller max muxing size + logging tweaks
* No need to return an err since it wiill panic anyway
* Use a default encoder preset if one is not supplied
* Rename to NewTranscoder. Add comments.
* Rename Bitrate to VideoBitrate. Config file changes required with this rename.
* Allow overrides of segment length. Allow offline stream to live in a single segment
* Append offline state video to existin HLS stream instead of overwriting because players do not like that
* Make properties private as they do not need to be exported
