The following reply was made to PR bin/22029; it has been noted by GNATS.

From: Sergey Svishchev <svs+pr@grep.ru>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: bin/22029
Date: Sat, 30 Sep 2006 00:20:21 +0400

 mplayer doesn't use normal read() calls, it issues SCSI commands to
 the drive.  This is required since those MPEG streams are stored in
 different physical format (MODE2 FORM2) and cd(4) driver does not
 support it.  So, the behaviour you see with DVD-ROM drive is expected.
 I can't explain why it works with the Plextor PX-W2410A, though.
 
 Also, MPlayer has a bug in NetBSD-specific code that reads VideoCDs
 (I've submitted a patch to MPlayer developers recently) -- if you're not
 lucky, the disc will play without video...
 
 -- 
 Sergey Svishchev