For example, a Mono8 642x482 would have failed to work, as GStreamer
expects the stride to be a multiple of 4-bytes, that is 644 bytes in
this example, while Pleora doesn't do this alignment. This incurs a copy
unfortunately, and there might be a way with memory meta to avoid this,
however eventually most elements will need to have the data 4-byte
aligned.
e364cfe4d5