INTERACT FORUM
More => Old Versions => JRiver Media Center 27 for Windows => Topic started by: newsposter on March 05, 2021, 10:47:57 am
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Only seeing full speed on 1 out of 6 or 7 of the current batch of CDs. Most rips are happening at 2x or so.
The drive itself is a 48x Toshiba/Samsung 552B DVD R/W (SATA) drive with the last-available firmware, connected in a USB3 enclosure and is the only device on the computer root hub. Get the same results on the laptop internal DVD drive as well though.....
What are the system, drive, and MC variables I should be looking at to see if anything can be improved?
Thank You
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Is Windows Defender configured?
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I believe I have it set to your recommendations, yes
When ripping, the 'bump' to a full-speed, 10x and better, rip will often take place in the middle of a rip. I don't think I've seen a rip start out at anything faster than 2x.
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What you're encoding to can be a factor. You could try ripping to WAV, just as a test, preferably to a local drive to rule out problems with network or USB drives.
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Secure ripping being enabled will also slow down the ripping process, especially if it has to keep re-reading/re-ripping the tracks, like if there's a lot of scratches or something like that causing inconsistencies of the data being extracted and compared with the test read/rip. With decently scratched discs it could be reading/ripping the track(s) several times in an effort to properly rip the data.
You can try disabling secure ripping to see if your ripping speed increases, but do note if the disc can't be accurately read the tracks may contain audible clicks/skips. Personally I keep secure ripping enabled even though it's a slower process, it's good to have the peace of mind about your rips being accurate.
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re-reads would show in the rip-report, yes? I do have a number of badly scratched and otherwise damaged discs that have been set aside for now.
The vast majority of the rips are 100% clean without documented re-reads. Just slow.
I can try a few rips this evening with secure-rip turned off to see if that's the deal. I have enough work in front of me that some experimentation is well worth the time.
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If secure ripping is enabled, it'll automatically read the tracks multiple times and compare the hashes of the extracted data to make sure they match.
https://wiki.jriver.com/index.php/CD_Settings
Secure: This is the default mode and will give the most reliable rips. It does multiple read passes to ensure the extracted data is correct. It will generally be half the speed of other methods and possibly much slower than that if the media is damaged or the computer is very busy doing other tasks.
I've had instances where brand new discs take 45+ minutes to rip with secure ripping enabled. It's annoying, but like I said above it's worth the peace of mind regarding the accuracy of the rip.
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Agreed on the peace-of-mind factor. That's what I'm shooting for.
Is there a library field that (or could be) auto-populated with the status of a rip to verify bit-correct (as compared to the various on-line CRC databases) or is the MC "secure rip" is complete/good?
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Unlike vinyl discs where the reading head (tone arm) moves along the "data spiral" with computer discs, hard drives and optical discs drives, the reading head usually follows a fixed path across the "data spiral". Therefore unlike vinyl where the disc is revolved at a constant speed, for computer discs the speed at which the head moves forward, or backwards is constant but the rotational speed increases or decreases depending on where the head is relative to the discs radius.
To achieve a, hopefully, constant data transfer rate between the disc and the pc; for hard discs, which usually have a "data spiral" that runs from the outside to the inside the rotational speed will decrease as the head advances towards the centre of the disc. For optical discs (cds and dvds), where the "data spiral" runs from the inside to outside, the rotational speed will increase as the head retreats towards the outside of the disc.
The "speed" quoted for Optical Disc Drives is it's Maximum Speed, the speed used to achieve a constant data transfer rate will usually vary.
Therefore, if either the software used to rip an optical disc, or the optical disc drive, consistently reports that it carried out that operation at the drives "maximum speed" start to panic because that should seldom happen!!!!