Curious About About Ripping Blu-Ray Disks

[cornemuse]

I'm just curious here. I know how long it takes to rip a DL DVD (approximately, it varies).
Blu-Ray disks have 3 - 6 times the amount of storage. (S/L + D/L).
How long does it take to rip say a duel layer B-D? (50 ±?)
With that much data on one, are they more prone to errors from scratching?
I've never seen anything off a B-D, no B-D R, R/W, so I cant compare the two for 'quality'.

Just wondering, , ,

-corne-

[usually_quiet]

A few years ago I tested an LG WH14NS40 by ripping one Blu-ray disc and one DVD. It took 26 min. to decrypt and copy everything (31.4 GB) from my commercial Blu-Ray, which was in good condition. The maximum read speed that it reached while ripping the Blu-ray was 6.7x. The drive is capable of 12x read speeds, so it is rip locked but not badly crippled. Most if not all Blu-ray drives are rip-locked.

For comparison, it took 21 minutes to rip a commercial DVD with the same drive.

[cornemuse]

Thanks!

[cornemuse]

Now that I have started this, I'll continue, , ,

Once ripped from a blu-ray, can a file (movie) be converted to a size similar to a DVD sized (4.7 - 8.5 G) file without losing image quality?

[jagabo]

Once ripped from a blu-ray, can a file (movie) be converted to a size similar to a DVD sized (4.7 - 8.5 G) file without losing image quality?

Of course not. Any re-compression with any lossy codec will lose quality. That's why they're called "lossy." But how much you lose will depend on what codecs and settings you use and the nature of the video itself. Whether you will see a difference depends on many factors.

[october262]

Now that I have started this, I'll continue, , ,

Once ripped from a blu-ray, can a file (movie) be converted to a size similar to a DVD sized (4.7 - 8.5 G) file without losing image quality?

what program are you using to copy your blu-ray discs ?? with dvdfab, you can copy the whole disc, convert it to dvd disc - https://www.dvdfab.cn/tips/how-to-convert-blu-ray-to-a-dvd-5-disc.htm and - https://www.dvdfab.cn/blu-ray-to-dvd-converter.htm

[Cornucopia]

Yes, you can, @october262, but you will STILL lose quality if recompressing lossily (e.g. when you are wanting to make the files smaller)

Scott

[Constant Gardener]

a good downsizer should save the removed detail and save it for when one wants to upconvert something to HD. I'm working on it, but I'm having a problem with a guy named Claude who insists it will never work.

[Cornucopia]

@ConstantGardener, the fallacy in your logic is the assumption that a re-upsizer knew exactly what the original material was like BEFORE it got downsized. It doesn't (assuming you no longer have that original file). Your CURRENT source has been re-encoded (as one must) and so the new master is different from the original not only in the changes due to resizing, but also the losses due to that last generation of encoding. Plus possibly color system and/or subsampling changes (especially if going between UHD <--> HD or HD<-->SD). No LOSSY encoder saves those changes, or you wouldn't gain the benefits of lossy encoding. And if you are going lossless, plus adding sidecar changes, it makes more sense to just use the higher rez original. And if you have the original, there would be no need to go through all those steps just to come back around to where you started.

Unless I am reading your statement wrong...


Scott

[Constant Gardener]

Always wondered why when I downsized Stargate Universe to DVD, and subsequently upscaled Green Acres, I get spacecraft in quite inappropriate scenes. Evidently there are still some issues to resolve...

[cornemuse]

Now that I have started this, I'll continue, , ,

Once ripped from a blu-ray, can a file (movie) be converted to a size similar to a DVD sized (4.7 - 8.5 G) file without losing image quality?

what program are you using to copy your blu-ray discs ?? with dvdfab, you can copy the whole disc, convert it to dvd disc - https://www.dvdfab.cn/tips/how-to-convert-blu-ray-to-a-dvd-5-disc.htm and - https://www.dvdfab.cn/blu-ray-to-dvd-converter.htm

Not attempted yet. Dont even have a BR-disk RW (in the comp) yet. Where I get DVD's (local librarys) they are getting BR disks, but not the same flicks on DVD.