Add indirection for formatContext to avoid double delete after demuxe…

…r forceClose

Add function to read or set FFmpeg logging level

Add demuxer force close, improve demuxer cleanup on GC

Use page with stable link names to handle autobuild updates

Allow codec configuration with array-like objects

Fix to array-like filter handling

Allow filtering with array-like and array-of frames.

More forgiving about array-like objects used to configure filters