qtmux: fix renegotiation check
By the time sink_event is called, the pad's current caps have already been updated. To address this, implement sink_event_pre_queue, and check if the pad can be renegotiated there.
Fixes #707 (closed)
By the time sink_event is called, the pad's current caps have already been updated. To address this, implement sink_event_pre_queue, and check if the pad can be renegotiated there.
Fixes #707 (closed)