[mythtv-users] How long should a mythdvd perfect rip take?
Charles Francis
charles at francis-home.com
Mon Jun 26 14:05:41 UTC 2006
I can rip a DVD using the ISO method in about 25 minutes on my system.
I'm running FC5 on an Athlon 64 3200+ with 2gb of memory. Single SATA
300GB drive. Doesn't the ripper also write to the DB to store the
information? Could it be possible the DB is your bottleneck?
> Hello -
> I'm writing to inquire about how long (on average) it requires for
> people
> to do a "perfect rip" via MythDVD. The reason I ask is because I believe
> that I was able to do this via an older 0.18 version of myth in roughly 20
> minutes. I've since rebuilt this system (though kept the hardware the
> same)
> and now that I'm running a recent version of myth (and mythplugins)
> checked
> out from the svn trunk, It's taking between 65-75 minutes to do a perfect
> rip. Obviously my metrics aren't exact and the software load has changed
> substantially, but I was just hoping I could get some feedback as to how
> long it is taking others to get a perfect rip of a full-lenght dvd? I
> presume most dvd's these days are dual-layer, if that narrows down the
> feedback at all. If this is the same performance others are getting for
> this type of DVD drive, then I can stop worrying this issue and move on to
> other things!
>
> Just to provide some insight into my system, here are the specs that might
> be considered pertinent:
>
> - DVD Drive - Lite-On 1683S. I've read numerous places on the web
> that these drives can only effectively read a dual-layer DVD a 8x. I
> belive
> 8x means 8*150Kbytes per second, which is 1.2Mbytes per second. Doing
> the math, that means it would/should take 100+ minutes to read a 6-8Gig
> DVD. This doesn't seem correct, so surely my logic is wrong.
> - My machine is running FC4 with 2.6.16-1.2115_FC4. All software
> EXCEPT for myth is running at the latest version (as of 6/25/06) via a
> yum
> upgrade.
> - machine is writing to an LVM that is a hetergenous combination of
> SATA and IDE drives. This concerned me at first, but I've done timing
> tests
> with 'dd' and don't see any difference writing the data from DVD to
> /dev/null or the mythvideo mount point.
> - I've included the output below attained from running cdrecord to
> dump params as well my dd tests below.
>
> Thank you in advance for any information you may be able to provide.
>
> thanks, doug.
>
> [root at myth1 ~]# cat /proc/sys/dev/cdrom/info
> CD-ROM information, Id: cdrom.c 3.20 2003/12/17
>
> drive name: hde
> drive speed: 63
> drive # of slots: 1
> Can close tray: 1
> Can open tray: 1
> Can lock tray: 1
> Can change speed: 1
> Can select disk: 0
> Can read multisession: 1
> Can read MCN: 1
> Reports media changed: 1
> Can play audio: 1
> Can write CD-R: 1
> Can write CD-RW: 1
> Can read DVD: 1
> Can write DVD-R: 1
> Can write DVD-RAM: 0
> Can read MRW: 0
> Can write MRW: 0
> Can write RAM: 1
>
> [root at myth1 mythtv]# cdrecord -prcap -dev=/dev/dvd
> Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 JAśrg
> Schilling
> Note: This version is an unofficial (modified) version with DVD support
> Note: and therefore may have bugs that are not present in the original.
> Note: Please send bug reports or support requests to
> http://bugzilla.redhat.com/bugzilla
> Note: The author of cdrecord should not be bothered with problems in this
> version.
> scsidev: '/dev/dvd'
> devname: '/dev/dvd'
> scsibus: -2 target: -2 lun: -2
> Linux sg driver version: 3.5.27
> Using libscg version ' schily-0.8'.
> cdrecord: Warning: using inofficial libscg transport code version (schily
> -
> Red Hat-scsi-linux1.83 04/05/20 Copyright 1997 J. Schilling').
> Device type : Removable CD-ROM
> Version : 0
> Response Format: 2
> Capabilities :
> Vendor_info : 'LITE-ON '
> Identifikation : 'DVDRW SOHW-1693S'
> Revision : 'KS06'
> Device seems to be: Generic mmc2 DVD-R/DVD-RW.
>
> Drive capabilities, per MMC-3 page 2A:
>
> Does read CD-R media
> Does write CD-R media
> Does read CD-RW media
> Does write CD-RW media
> Does read DVD-ROM media
> Does read DVD-R media
> Does write DVD-R media
> Does not read DVD-RAM media
> Does not write DVD-RAM media
> Does support test writing
>
> Does read Mode 2 Form 1 blocks
> Does read Mode 2 Form 2 blocks
> Does read digital audio blocks
> Does restart non-streamed digital audio reads accurately
> Does support Buffer-Underrun-Free recording
> Does read multi-session CDs
> Does read fixed-packet CD media using Method 2
> Does not read CD bar code
> Does read R-W subcode information
> Does not return R-W subcode de-interleaved and error-corrected
> Does read raw P-W subcode data from lead in
> Does return CD media catalog number
> Does return CD ISRC information
> Does support C2 error pointers
> Does not deliver composite A/V data
>
> Does play audio CDs
> Number of volume control levels: 256
> Does support individual volume control setting for each channel
> Does support independent mute setting for each channel
> Does not support digital output on port 1
> Does support digital output on port 2
> Does not send digital data LSB-first
> Does not set LRCK high for left-channel data
> Does not have valid data on falling edge of clock
> Length of data in BCLKs: 16
>
> Loading mechanism type: tray
> Does support ejection of CD via START/STOP command
> Does not lock media on power up via prevent jumper
> Does allow media to be locked in the drive via PREVENT/ALLOW command
> Is not currently in a media-locked state
> Does not support changing side of disk
> Does not have load-empty-slot-in-changer feature
> Does not support Individual Disk Present feature
>
> Maximum read speed: 11080 kB/s (CD 62x, DVD 8x)
> Current read speed: 11080 kB/s (CD 62x, DVD 8x)
> Maximum write speed: 22160 kB/s (CD 125x, DVD 16x)
> Current write speed: 22160 kB/s (CD 125x, DVD 16x)
> Rotational control selected: CLV/PCAV
> Buffer size in KB: 2048
> Copy management revision supported: 1
> Number of supported write speeds: 9
> Write speed # 0: 8467 kB/s CLV/PCAV (CD 48x, DVD 6x)
> Write speed # 1: 7056 kB/s CLV/PCAV (CD 40x, DVD 5x)
> Write speed # 2: 5645 kB/s CLV/PCAV (CD 32x, DVD 4x)
> Write speed # 3: 4234 kB/s CLV/PCAV (CD 24x, DVD 3x)
> Write speed # 4: 2822 kB/s CLV/PCAV (CD 16x, DVD 2x)
> Write speed # 5: 2112 kB/s CLV/PCAV (CD 12x, DVD 1x)
> Write speed # 6: 1764 kB/s CLV/PCAV (CD 10x, DVD 1x)
> Write speed # 7: 1411 kB/s CLV/PCAV (CD 8x, DVD 1x)
> Write speed # 8: 706 kB/s CLV/PCAV (CD 4x, DVD 0x)
>
>
> [root at myth1 mythtv]# time -p dd if=/dev/cdrom of=/dev/null bs=1k
> count=15000
> 15000+0 records in
> 15000+0 records out
> real 12.09
> user 0.00
> sys 0.68
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