Tries to find what type of data is flowing from the given source gstreamer.Pad
Free-function: gst_caps_unref
A source gstreamer.Pad
The length in bytes
the gstreamer.Caps corresponding to the data stream. Returns NULL if no gstreamer.Caps matches the data stream.
Tries to find what type of data is flowing from the given source gstreamer.Pad
Free-function: gst_caps_unref