[ CCode ( cname = "gst_buffer_add_video_overlay_composition_meta" ) ]
public unowned OverlayCompositionMeta? buffer_add_video_overlay_composition_meta (Buffer buf, OverlayComposition? comp)
Sets an overlay composition on a buffer.
The buffer will obtain its own reference to the composition, meaning this function does not take ownership of comp.
| buf |
a Buffer |
| comp |