playbin2: send one about-to-finish per group
To avoid multiple about-to-finish signal, driving the app to drop uris, a group should signal "about-to-finish" and setup a next uri only one time.
Fixes #930 (moved)
Edited by Stéphane Cerveau
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To avoid multiple about-to-finish signal, driving the app to drop uris, a group should signal "about-to-finish" and setup a next uri only one time.
Fixes #930 (moved)