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laserdisc_fan
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Post subject: The truth about laser rot Posted: 01 Oct 2011, 18:41 |
Jedi Candidate |
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Joined: 29 Jan 2006, 20:05 Posts: 2266 Location: United Kingdom Has thanked: 0 time Been thanked: 23 times
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The very first laserdisc I ever bought suffered from laser rot Still this was not enough to put me off the format for life - I persevered. There was a certain excitement wondering if the next LD I paid mega $$$ for would actually play or not! No other format delivers this rush of hope and despair simultaneously. I suspect everyone who collects LDs has a few laser rot stories to tell. I am no different. The Gloria Estefan US LD that was so bad the audio sounded like a helicopter taking off - thank you Sony DADC! The 10+ copies of Olivia Newton-John TV Special I had to buy to get one copy where both sides on the same disc played perfectly - thank you Discovision! The 20+ copies of almost any PVLM* series title I had to buy to get one side to play perfectly, never mind both sides on the same disc! - thank you Pack In Video! The early UK PAL laserdiscs whose sides were so badly stuck together with water based glue the two sides actually separated - thank you PDO UK! The other early PAL laserdiscs which you could see right through the disc if you held them up to a light - little wonder the LD player was having difficulties playing them as the signal surface had eroded completely - thank you PDO UK again!!
Last edited by laserdisc_fan on 01 Oct 2011, 21:36, edited 2 times in total.
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admin
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Post subject: Re: The truth about laser rot Posted: 01 Oct 2011, 21:18 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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laserdisc_fan wrote: thank you Sony DADC! I was curious to see how bad SONY DADC actually did. Since all the mint markings are in the same format LDxx-<6-digit sequential number), I can easily extract the sequence number and list them ordered (old releases at the top, most recent at the bottom). Here is the link (generated on spot, not an archive): SONY DADC - Slowly We Rot And the format: Quote: [SERIAL] => [Number of Rot Reports] TITLE [Reference] [More Sides]
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: The truth about laser rot Posted: 01 Oct 2011, 21:43 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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firehorse_44 wrote: Would like to see more input on this subject from other users regarding bad eggs.... Stay away from these... or be very cautious and have them tested before buying: http://www.lddb.com/laserrot.php
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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takou
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Post subject: Re: The truth about laser rot Posted: 02 Oct 2011, 08:40 |
True fan |
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Joined: 04 Apr 2004, 18:11 Posts: 322 Location: Switzerland Has thanked: 1 time Been thanked: 8 times
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You never know what you gonna find. For example, Starship Troopers is # 5 of Top 100 but I have a clean copy in my collection, and I even managed to sell an other one for $20 on LDDB, without any complaints from the buyer. Same thing for my Air Force One, # 6 but clean as a whistle.
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gandjrarities
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Post subject: Re: The truth about laser rot Posted: 02 Oct 2011, 22:22 |
Honest fan |
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Joined: 23 Feb 2011, 17:51 Posts: 83 Location: United States Has thanked: 4 times Been thanked: 7 times
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The worst thing is when you sell a copy on eBay and then double check it and find it has the rot. Happened to me with "Underwater!" It was still watchable but talk about your speckles! I warned the buyer about it, but he still wanted it, and I told him to send it back for a full refund if he was unhappy, but never heard from him again. Like I wrote somewhere in my listings, sometimes even with speckling, laser discs can still look a lot better than VHS tapes, with their glitches and dropouts! J
_________________ “Fun is like insurance — the older you get, the more it costs.”
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laserlord
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Post subject: Re: The truth about laser rot Posted: 04 Oct 2011, 00:18 |
Honest fan |
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Joined: 10 Sep 2002, 21:15 Posts: 68 Location: Belgium Has thanked: 0 time Been thanked: 0 time
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yazorin wrote: how about those rolling dropout things? what causes that? those rolling dropouts that you are talking about are caused by imperfections of the disc (dirt, scratches...) Julien, correct me if I'm wrong
_________________ Pioneer ELITE LD-S2 McIntosh MLD7020 iScan HD ... and a whole lot of LD's
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admin
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Post subject: Re: The truth about laser rot Posted: 04 Oct 2011, 02:44 |
Site Admin |
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Joined: 07 Aug 2002, 23:37 Posts: 4549 Location: Tokyo Has thanked: 294 times Been thanked: 1144 times
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laserlord wrote: those rolling dropouts that you are talking about are caused by imperfections of the disc (dirt, scratches...) It could but more often it's due to "crosstalk". If the optic block is not properly aligned and follows perfectly the change of rotation of discs in CLV mode, you can misread the beginning of the next frame as the end of the previous one. It gives these famous "rolling bars". I've seen bad crosstalk on a slightly warped DTS disc. Weirdly the HLD-X9 would give up around 40mn while the LD-S9 was perfectly happy with it till the end of the side! Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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laserlord
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Post subject: Re: The truth about laser rot Posted: 05 Oct 2011, 22:20 |
Honest fan |
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Joined: 10 Sep 2002, 21:15 Posts: 68 Location: Belgium Has thanked: 0 time Been thanked: 0 time
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i think yazorin means this artifact, right ? (tried to reproduce quickly in photoshop) this is something different then a rolling bar problem... i'm sure lots of you have seen this before. am i correct that this is the result of a tiny imperfection on the disc ? these white stripes are always horizontal and appear in a blinking and rolling vertically fashion over the screen. It all is visible for less then a second, in general.
_________________ Pioneer ELITE LD-S2 McIntosh MLD7020 iScan HD ... and a whole lot of LD's
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publius
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Post subject: Re: The truth about laser rot Posted: 05 Oct 2011, 22:28 |
Hardcore fan |
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Joined: 23 Sep 2003, 18:14 Posts: 1391 Location: United States Has thanked: 39 times Been thanked: 21 times
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Those are dropouts. They are typically due to a pressing flaw in which one pit, or a few adjacent pits, on the data layer are missing. Sometimes this is due to damage to the master, in which case the same flaw can be seen on several copies of the disc. A small defect of this kind will be concealed by the "dropout compensator", which takes a sample from the previous line, but with larger defects this may not suffice. Typically the more noticeable ones occur as a little spot on the disc, affecting several adjacent frames ; because CLV discs have the frames slightly misaligned with each other, the spot will appear to move a few lines. On a CAV disc, the spot would appear in the same place on the screen over the course of a few frames, but the problem is less, because the pits are larger except at the inner edge, so any given size flaw has less effect.
_________________ MUSE decoder information and user guides LD player connexion guide
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Guest
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Post subject: Re: The truth about laser rot Posted: 22 Oct 2011, 16:42 |
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mikeystoyz wrote: One thing about laserrot, a lot of people think a crappy transfer is laserrot. I have a copy of Lair of the White Worm that is just a bad transfer. No rot at all, however, just on the surface you might think it is. I have my copy of copycat for reference. Jees, is that one bad. Very true. Appears to me like many LD(s) were transferred directly from less than perfect film prints. Speckles that show up in the LD title logo sequence are dead giveaways to me. Personally, I like old Black & White 35mm film prints with all the scratches and dirt that fly through the film ... gives me a feeling to sitting in a theater back in the day.
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