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charlieg wrote: sounds you are more into guns than DVDs.
It's a hobby, but one I can fall back on for income in bad times.
I hadn't thought about using a copy service, since this is copyrighted material and I expect many companies might balk at that. But I do have a legal right to make a backup, I believe - at least, it used to be true. But I like our resident codewitch's idea of using SSD for longevity. I'll look into that.
Will Rogers never met me.
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My friend melted his motherboard doing what you're looking to do, running massive transfers overnight.
The mean time between failure for an HDD is 5 years, and you're about to put a year of wear on it in a matter of days. Get an SSD. Its MTBF is closer to 20 years
You're probably better off just copying the discs, to be honest.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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Thanks for the idea! I hadn't considered that option, but it makes perfect sense. I may work out a plan to copy each disk, after I watch it, to a spare HDD, creating an index of some sort, and a structured file folder system to make it easier to find specific topics. Once the content is copied, I'll know how big a SSD I need, and I can buy it and do a bulk copy. That way I'll still have it all long enough that I can give it to someone in my Will!
Will Rogers never met me.
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If you use a ssd keep it in mind it has a limited amount of write cycles, which is probably fine for using it as a backup. But I've read that it needs to be powered on every now and then to refresh the nand memory.
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Jacquers wrote: But I've read that it needs to be powered on every now and then to refresh the nand memory.
I read that there are new types that get rid of that, but they still were expensive. Last 2 years I didn't check, maybe they got cheaper?
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Roger Wright wrote: Manually copying this much material to a HDD wil take years
Let me put a word in favor of manual copying. My collection has about 400 DVD's and the "pipeline" is very simple: create an ISO image; use Handbrake to convert it to MP4. It takes only about 15-20 min to create an ISO image and I do other things while DVD's are being copied. When copying is complete the program makes a ring-a-ding and I just plop another DVD in there. Conversion to MP4 takes much longer but Handbrake allows you queue many jobs that I let running overnight. I never kept track of how much time I actually spent converting those DVD's, but now if I do a short calculation, turns out to be about 2 full weeks.
I keep both ISO images and the MP4 in case I decide to fiddle around with Handbrake parameters (it has so freaking many parameters!) to get a better image.
Mircea
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Thanks for the tip, Mircea!
Will Rogers never met me.
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Long time ago, I had problems with my HDD and a friend of mine burnt a CD in Linux that took 1,5 minutes to be done. In Windows back at that time it had at least needed 15 minutes and that without checking for errors.
You could have a try with a plain dumb linux installation and some kind of ripper to *.iso? (you can later use Daemon Tools or something like that to use the *.iso in a virtual DVD)
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Ripping to ISOs is obviously going to be the fastest, but in terms of total storage requirements, I'd be looking at then converting to MP4 or some other format, as others have suggested.
Personally, I'm paranoid and wouldn't feel comfortable getting rid of either the original discs or the ISO files until I've watched at least a few. I've seen problems in the past where, after encoding, the audio would slowly drift from the video over time, so after (say) 90 minutes, people's mouths would be moving out of sync with the voices you heard. I don't know of any way to verify this without sitting through the entire thing.
Also I wouldn't simply copy to DVD-Rs (unless I misunderstood some people's suggestions). The idea is to move away from the hundreds of discs and onto something more convenient. A big pile of files sitting on a single hard disk is a lot easier to deal with than a big pile of discs. Even uncompressed, you can put nearly 1000 dual-layer (8.5GB) DVDs on an 8TB hard drive, which are pretty cheap nowadays.
Keep at least two copies of everything (one on a hard drive, another on SSDs?)...don't assume one's more reliable than the other. Then as larger capacity drives come out over the years, copy (don't move) the files onto the larger ones. Don't get rid of the other (older) drives unless you can make a few bucks from them, I suppose. Depends on how valuable this all is to you.
And if you're going to re-encode video, I suggest you look at the H.265 codec. It's intended for high resolution video, but still works very well for DVD - the resulting files are much smaller, and as long as the bitrate remains high enough, you won't be able to tell, visually, the difference with the originals. I would also imagine this sort of material is recorded (at best) with 2-channel stereo, and not wasting bits on 6-channels. H.265 takes longer to encode, and you need a somewhat faster processor to play it back in real time than older formats, but unless you're dealing with something like a 10-year old CPU, that should generally not be a problem nowadays.
I'm late to this thread, but I hope there was something valuable in there.
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Very helpful information! And yes, this material is mostly recorded lectures and demonstrations of how to analyze firearm failures, fabricate new parts, and fit them to make repairs. There's no fast parts, no high quality audio, just straight training. The originals I got 8 years ago were actually VHS recordings transferred to DVDs, so quality is really not a huge issue. Preserving the information is all that I care about, and having all of it in one physical place would be helpful simply to save space! With the new additions, I probably have 15' to 20' of shelf space needed.
Will Rogers never met me.
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Roger Wright wrote: With the new additions, I probably have 15' to 20' of shelf space needed.
Wow!
Just think, you'll be able to carry this on a few MicroSD cards 
...and speaking of which: Large/cheap MicroSD cards and thumbdrives sold on Amazon (and other resellers) have been reported as downright fraudulent. Some cards will let you write to them, the OS report no error when writing, but the data's just missing. If you later try to re-read the files, there's nothing to be read back. So I wouldn't trust one of those until you know you can fill it and read it back. Steve Gibson has written a tool just for that verification purpose.
Not that a MicroSD card of thumbdrive would be my first choice when it comes to long-term storage for data of this nature.
modified 3hrs 20mins ago.
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dandy72 wrote: would also imagine this sort of material is recorded (at best) with 2-channel stereo, and not wasting bits on 6-channels. H.265 takes longer to encode,
Current hardware from anyone here should be more than able to cope with it
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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Nelek wrote: Current hardware
Until about a year ago, I was still using an Atom CPU-based system to watch video files on my projector. For the longest time I went out of my way to avoid H.265 files 'cuz the system was using to view them was just stuttering all over the place. I replaced that system with the cheapest Beelink system I could find (you might have seen some of my posts ranting and raving about them) and haven't had a single lost frame since.
Even though it was an old Atom CPU, it still annoyed me a bit to have to replace it, as the machine was really single-purpose...for which it became unsuitable. Oh well.
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Wordle 1,202 4/6*
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Luck!
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Wordle 1,202 4/6
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Wordle 1,202 4/6*
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Wordle 1,202 2/6*
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Even luckier!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Wordle 1,202 5/6
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In a closed society where everybody's guilty, the only crime is getting caught. In a world of thieves, the only final sin is stupidity. - Hunter S Thompson - RIP
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Wordle 1,202 4/6*
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Happiness will never come to those who fail to appreciate what they already have. -Anon
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Wordle 1,202 3/6
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Wordle 1,202 5/6
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Ok, I have had my coffee, so you can all come out now!
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Wordle 1.202 5/6
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This one stumped me (though I'm mentally dried out these days).
GCS/GE d--(d) s-/+ a C+++ U+++ P-- L+@ E-- W+++ N+ o+ K- w+++ O? M-- V? PS+ PE Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
The shortest horror story: On Error Resume Next
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"A little time, a little trouble, your better day"
Badfinger
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I hope this group can find it in their harts to forgive me for posting this here...
but I need to vent...
I run into a BIG ( for me ) issue so I asked "customer service " for SOLUTION.
I received a (AI?) message saying the issue has been solved, (please) post "how we did ".
The message did not say anything about the actual "solution".
So I checked the "bug post " and it contains this "solution ":
Everyone should be responsible for their behavior, even on internet.
As workaround, you can create another account, start a new life on internet.
So - it i obviously my fault and I need to "get a new one "....
It does not count I told them I cannot update my code using new account...
I am locked by their security to the original.
NO, I am not complaining, it would not make beans if I did.
I am just curious how the outfit expect to stay in business with such "friendly customer attitude"..
PS They certainly lost my business, and obviously do not care.
Thanks for watching...
Cheers
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You lost me, did the 'solution' solve your problem? If so, good, you should be happy. Now what does creating another account as a work around for some mysterious thing, have to do with this non-complaint?
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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