[FFmpeg-devel] [PATCH v4 13/18] avfilter/overlay_graphicsubs: Add overlay_graphicsubs and graphicsub2video filters

[Paul B Mahol]

You are still duplicating core overlaying code from overlay filter, among
other things.

Filter should be in same file as vf_overlay filter, this is more demanding
to do because its harder than code extraction/copy&paste and adding defines
and extra variables/functions for different paths.