Finds the first descriptor of type tag in the array.
Note: To look for descriptors that can be present more than once in an array of descriptors, iterate the GArray manually.
an array of GstMpegtsDescriptor
the tag to look for
the first descriptor matchin tag, else NULL.
Finds the first descriptor of type tag in the array.
Note: To look for descriptors that can be present more than once in an array of descriptors, iterate the GArray manually.