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.
See Implementation
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.