Copies the first datetime for the given tag in the taglist into the variable pointed to by value. Unref the date with gst_date_time_unref() when it is no longer needed. Free-function: gst_date_time_unref
tag to read out
address of a GstDateTime pointer variable to store the result into. [out callee-allocates][transfer full]
TRUE, if a datetime was copied, FALSE if the tag didn't exist in thegiven list or if it was NULL.
See Implementation
Copies the first datetime for the given tag in the taglist into the variable pointed to by value. Unref the date with gst_date_time_unref() when it is no longer needed. Free-function: gst_date_time_unref