![]() What I found was that when VLC plays non-Disney movies, it does fine, but with Disney movies, it tends to get stuck and/or skip now and then (sometimes with long intervals between incidents, sometimes several in quick succession, and sometimes with only a few per movie, sometimes with numerous ones). In fact, after the third or fourth time, I went to the library and signed out a bunch of animated movie DVDs and tested them. Not sure if that is funny anymore or just sad. The usual ultimate irony is, of course, that only legitimate customers like us have these problems. Unfortunately, because this involves breaking (ineffective) encryption, doing it is illegal in most countries these days. The only workaround is to image the whole disc to the hard drive, ignoring read errors, and then play the image file (which will not generate any further read errors). (The explanation may have technical inaccuracies, but I think the basic idea is correct.) If the cache size is such that part of it would be filled from the faulty sectors when playing the end of the chapter. ![]() The problem is that computer-based players tend to have a linear read-ahead cache - possibly already at the OS level - which doesn't account for any jump commands in the "playlist". Apparently the idea is that if the player reads only those sectors the DVD "playlist" requires, it will skip the faulty sectors and work just fine. Obviously, the protection scheme is either blatantly breaking the DVD standard, or utilizing some loopholes in it. But while it is trying to re-read, no data flows from the disc to the player, which is why the freezes happen. When playing, the OS tries re-reading them again and again, and eventually reports read errors. Looking at dmesg (Linux system log) confirms that faulty sectors have been deliberately added to the disc at certain points. This has the effect that the only way to be able to pick the correct titles on these DVDs is to navigate through the DVD menu. In addition to the incorrect size, the broken TOC also causes any DVD player to report a huge array of titles on the disc. The most likely explanation is a deliberately broken TOC with multiple references to the same physical files. Jumping to chapter points seems safe (no freeze).Įxamining the discs more closely, they report sizes like 80GB. I can confirm the same phenomenon on many Funimation anime titles.Īt the end of each episode of a series on such a disc, VLC may skip a few seconds - and if one tries seeking to near that point in time, VLC sometimes freezes altogether (especially if one tries seeking backwards from the start of the next episode). ![]() Now that this forum thread was resurrected. I know that some recent Disney DVD's are using a new protection scheme and maybe that's the cause of the trouble.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |