I'm trying to rip "Star Trek Beyond" (UHD) to iso and so far each attempt has been VERY slow (~1-3MB/s) and each iso has been slightly different. No errors have been reported during the rips. When I play back the video, either the m2ts or an mkv made from the m2ts, I get glitches in the video, but each iso has them at different times. MakeMKV rips it just fine; full speed and no glitches in the video. AnyDVD: 126.96.36.199 Drive: HL-DT-ST BD-REWH16NS40 1.02 I have ripped 15 UHDs so far without issue so it seems there's something specific about this disc that's a problem. The disc did have some fingerprints on it but I thoroughly cleaned it and the results were no different. The sparse option is unchecked. I just started a rip to a protected image. It's slightly faster (4MB/s) but still far slower than normal. I'll report back if the protected image is error-free. Is there anything I can do to collect useful information to help debug this case?