Copy @size bytes from @mem starting at @offset and return them wrapped in a new GstMemory object. If @size is set to -1, all bytes starting at @offset are copied.
a new #GstMemory object wrapping a copy of the requested region in @mem.
See Implementation
Copy @size bytes from @mem starting at @offset and return them wrapped in a new GstMemory object. If @size is set to -1, all bytes starting at @offset are copied.