How is BD-RB so wildly off-size? I have a blu-ray that's only 4.73GB, so I ask it to encode to BD-5 (4.37GB). Result: 3.73GB. This is with highest quality, 2-pass. The entire point of 2-pass is to get exact size. I've repeated this with FULL blu-rays, to BD25. The result is ALWAYS smaller than DVDFAB, thus, lesser quality. It's off by GIGABYTES. Custom size 23.3GB? BD-RB gives me 19-21GB.
BD-RB log