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Speed problems when making MKV

Posted: Mon Feb 08, 2010 7:13 pm
by moviemaniac
Hi guys!

I've been using this great application for a few days now, however I have noticed a small speed problem when making MKVs. When I copy files manually from my external BD drive (Liteon ihes108 in an external enclosure) I get maximum speed (about 20MB/s when copying to an external hard drive). However, when I rip a BD to MKV withe MakeMKV I only get abour 5MB/s which is painfully slow. I'm on Ubuntu lucid (10.04) x64. Any suggestions?

thanks!
mm

Re: Speed problems when making MKV

Posted: Tue Feb 09, 2010 9:21 am
by mike admin
what happens with cpu usage?

Re: Speed problems when making MKV

Posted: Tue Feb 09, 2010 9:35 am
by moviemaniac
CPU usage is very low, I didn't check the exact usage, but it was maybe like 5-10% (C2D E8235 2.8GHz)

Re: Speed problems when making MKV

Posted: Mon Feb 15, 2010 7:37 am
by mrbass
just make sure it is connected straight to your usb port on computer rather than a hub or keyboard usb port.

Re: Speed problems when making MKV

Posted: Mon Feb 15, 2010 9:27 am
by moviemaniac
I just tried that and it didn't change anything. I can copy via Nautilus or Thunar with max. USB 2.0 speed, but MakeMKV still only copies with 0.9-1.2x speed (about 5MB/s) with about 15% CPU usage.

Re: Speed problems when making MKV

Posted: Tue Feb 16, 2010 3:00 pm
by skittle
iirc that liteon is riplocked, you need to use an patched firmware

Re: Speed problems when making MKV

Posted: Tue Feb 16, 2010 5:56 pm
by moviemaniac
That's not it either (at least not the whole problem) - under OSX using MakeMKV and the very same drive I can rip with 2.5x speed (about 10MB/s).

Re: Speed problems when making MKV

Posted: Thu Mar 04, 2010 8:41 am
by mike admin
Please try the latest 1.5.0 version and check if it got any faster. It has improvements in linux IO code.

Re: Speed problems when making MKV

Posted: Thu Mar 04, 2010 10:06 am
by moviemaniac
Thanks very much - I just tested it and the ripping speed increased from reading at about 1x speed to about 2,5-2,7x speed at which point it maxes out one of my two cpu cores with I/O load. So thanks very much for the fix! (*looking for my credit card now* :D )