Get length memory blocks in buffer starting at idx. The memory blocks will be merged into one large GstMemory. If length is -1, all memory starting from idx is merged.
an index
a length
a GstMemory that contains the merged data of length blocks starting at idx. Use gst_memory_unref() after usage. [transfer full]
See Implementation
Get length memory blocks in buffer starting at idx. The memory blocks will be merged into one large GstMemory. If length is -1, all memory starting from idx is merged.