Hello -<br>
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!
<br><br>Just to provide some insight into my system, here are the specs that might be considered pertinent:<br><ul><li>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.</li><li>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.
</li><li>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.
</li><li>I've included the output below attained from running cdrecord to dump params as well my dd tests below.</li></ul>Thank you in advance for any information you may be able to provide.<br><br>thanks, doug.<br><br>
[root@myth1 ~]# cat /proc/sys/dev/cdrom/info<br>CD-ROM information, Id: cdrom.c 3.20 2003/12/17<br><br>drive name: hde<br>drive speed: 63<br>drive # of slots: 1<br>Can close tray: 1<br>
Can open tray: 1<br>Can lock tray: 1<br>Can change speed: 1<br>Can select disk: 0<br>Can read multisession: 1<br>Can read MCN: 1<br>Reports media changed: 1<br>Can play audio: 1
<br>Can write CD-R: 1<br>Can write CD-RW: 1<br>Can read DVD: 1<br>Can write DVD-R: 1<br>Can write DVD-RAM: 0<br>Can read MRW: 0<br>Can write MRW: 0<br>Can write RAM: 1
<br><br>[root@myth1 mythtv]# cdrecord -prcap -dev=/dev/dvd<br>Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 JAśrg Schilling<br>Note: This version is an unofficial (modified) version with DVD support
<br>Note: and therefore may have bugs that are not present in the original.<br>Note: Please send bug reports or support requests to <a href="http://bugzilla.redhat.com/bugzilla" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
http://bugzilla.redhat.com/bugzilla</a><br>
Note: The author of cdrecord should not be bothered with problems in this version.<br>scsidev: '/dev/dvd'<br>devname: '/dev/dvd'<br>scsibus: -2 target: -2 lun: -2<br>Linux sg driver version: 3.5.27<br>Using libscg version '
schily-0.8'.<br>cdrecord:
Warning: using inofficial libscg transport code version (schily - Red
Hat-scsi-linux1.83 04/05/20 Copyright 1997 J. Schilling').<br>Device type : Removable CD-ROM<br>Version : 0<br>Response Format: 2
<br>Capabilities :<br>Vendor_info : 'LITE-ON '<br>Identifikation : 'DVDRW SOHW-1693S'<br>Revision : 'KS06'<br>Device seems to be: Generic mmc2 DVD-R/DVD-RW.<br><br>Drive capabilities, per MMC-3 page 2A:<br><br>
Does read CD-R media<br> Does write CD-R media<br> Does read CD-RW media<br> Does write CD-RW media<br> Does read DVD-ROM media<br> Does read DVD-R media<br> Does write DVD-R media<br> Does not read DVD-RAM media
<br> Does not write DVD-RAM media<br> Does support test writing<br><br> Does read Mode 2 Form 1 blocks<br> Does read Mode 2 Form 2 blocks<br> Does read digital audio blocks<br> Does restart non-streamed digital audio reads accurately
<br> Does support Buffer-Underrun-Free recording<br> Does read multi-session CDs<br> Does read fixed-packet CD media using Method 2<br> Does not read CD bar code<br> Does read R-W subcode information<br> Does not return R-W subcode de-interleaved and error-corrected
<br> Does read raw P-W subcode data from lead in<br> Does return CD media catalog number<br> Does return CD ISRC information<br> Does support C2 error pointers<br> Does not deliver composite A/V data<br><br> Does play audio CDs
<br> Number of volume control levels: 256<br> Does support individual volume control setting for each channel<br> Does support independent mute setting for each channel<br> Does not support digital output on port 1<br>
Does support digital output on port 2<br> Does not send digital data LSB-first<br> Does not set LRCK high for left-channel data<br> Does not have valid data on falling edge of clock<br> Length of data in BCLKs: 16<br>
<br> Loading mechanism type: tray<br> Does support ejection of CD via START/STOP command<br> Does not lock media on power up via prevent jumper<br> Does allow media to be locked in the drive via PREVENT/ALLOW command
<br>
Is not currently in a media-locked state<br> Does not support changing side of disk<br> Does not have load-empty-slot-in-changer feature<br> Does not support Individual Disk Present feature<br><br> Maximum read speed: 11080 kB/s (CD 62x, DVD 8x)
<br> Current read speed: 11080 kB/s (CD 62x, DVD 8x)<br> Maximum write speed: 22160 kB/s (CD 125x, DVD 16x)<br> Current write speed: 22160 kB/s (CD 125x, DVD 16x)<br> Rotational control selected: CLV/PCAV<br> Buffer size in KB: 2048
<br> Copy management revision supported: 1<br> Number of supported write speeds: 9<br> Write speed # 0: 8467 kB/s CLV/PCAV (CD 48x, DVD 6x)<br> Write speed # 1: 7056 kB/s CLV/PCAV (CD 40x, DVD 5x)<br> Write speed # 2: 5645 kB/s CLV/PCAV (CD 32x, DVD 4x)
<br> Write speed # 3: 4234 kB/s CLV/PCAV (CD 24x, DVD 3x)<br> Write speed # 4: 2822 kB/s CLV/PCAV (CD 16x, DVD 2x)<br> Write speed # 5: 2112 kB/s CLV/PCAV (CD 12x, DVD 1x)<br> Write speed # 6: 1764 kB/s CLV/PCAV (CD 10x, DVD 1x)
<br> Write speed # 7: 1411 kB/s CLV/PCAV (CD 8x, DVD 1x)<br> Write speed # 8: 706 kB/s CLV/PCAV (CD 4x, DVD 0x)<br><br><br>[root@myth1 mythtv]# time -p dd if=/dev/cdrom of=/dev/null bs=1k count=15000<br>15000+0 records in
<br>15000+0 records out<br>real 12.09<br>user 0.00<br>sys 0.68