Append all the memory from @buf2 to @buf1. The result buffer will contain a concatenation of the memory of @buf1 and @buf2.
the second source #GstBuffer to append.
Return: the new #GstBuffer that contains the memory of the two source buffers.
See Implementation
Append all the memory from @buf2 to @buf1. The result buffer will contain a concatenation of the memory of @buf1 and @buf2.