cairotimeoverlay — Overlays the time on a video stream
GstCairoTimeOverlay;
GObject +----GstObject +----GstElement +----GstBaseTransform +----GstCairoTimeOverlay
cairotimeoverlay renders the buffer timestamp for each frame on top of the frame.
gst-launch -v -m videotestsrc ! cairotimeoverlay ! autovideosink
typedef struct _GstCairoTimeOverlay GstCairoTimeOverlay;