Video play back with SCSI DVD-ROMs

Nate Lawson nate at
Sun Jul 6 12:48:44 PDT 2003

On Sun, 6 Jul 2003, Mark Weinem wrote:
> 	4.8-STABLE and
> I heard, that Video DVD and VCD play back  don't work with SCSI
> (DVD-)ROMs - because of CAM's fixed blocksize.
> But I can play Video DVDs here with mplayer, ogle and vlc (but it's to
> slow)
> With mplayer and VCDs, I get the following error message:
> 	CDRIOCSETBLOCKSIZE: Inappropriate ioctl for device
> 	ioctl dif1: Invalid argument

CAM does not have a fixed block size.  You are seeing lack of support for
the CDRIOCSETBLOCKSIZE ioctl in cd(4).  This question comes up from time
to time and becomes a question of the duplication of cd(4) by atapicd.
The best thing for users is to probably go out and duplicate CD* ioctls in
cd(4) and later merge the two.


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