Copies a frame's I420 planes into a new buffer this thread owns, so it can be transferred to another thread (the
SDK's own frame buffer cannot be). Copies at most I420ByteLength bytes; a shorter buffer is copied whole, and
I420PlanesOf rejects it where it is encoded.
Copies a frame's I420 planes into a new buffer this thread owns, so it can be transferred to another thread (the SDK's own frame buffer cannot be). Copies at most I420ByteLength bytes; a shorter buffer is copied whole, and I420PlanesOf rejects it where it is encoded.