Parse a Gst.Event, identify if it is a Still Frame event, and
return the still-frame state from the event if it is.
If the event represents the start of a still frame, the in_still
variable will be set to TRUE, otherwise FALSE. It is OK to pass NULL for the
in_still variable order to just check whether the event is a valid still-frame
event.
Create a still frame event using gst_video_event_new_still_frame()
Parse a Gst.Event, identify if it is a Still Frame event, and return the still-frame state from the event if it is. If the event represents the start of a still frame, the in_still variable will be set to TRUE, otherwise FALSE. It is OK to pass NULL for the in_still variable order to just check whether the event is a valid still-frame event.
Create a still frame event using
gst_video_event_new_still_frame()