SCC writer merged into ttconv

The SCC writer has been merged into ttconv, with support for pop-on and roll-up style captions!

Demo at:

https://ttconv.sandflow.com/

Code and issue at:

https://github.com/sandflow/ttconv

A release is expected “soon”.

Thanks to Motion Picture Laboratories, Inc. (MovieLabs) for the support and to https://github.com/bbgdzxng1 for the help.

#accessibility #cta608 #ttml #webvtt #captions