Re: mplayer won't play audio CD

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

Curt wrote:
>  mplayer -cdrom-device /dev/hdb cdda://1
> or wherever the device exists on your machine.

Unless on very old systems, i'd expect /dev/sr0, /dev/sr1, ...


> Maybe there's no audio cable between the cd drive and the sound card. 

I doubt that mplayer would use the PLAY AUDIO command to let the drive
send an analog signal to the sound card. I rather assume it uses READ CD
to get the 16 bit digital audio data and then processes them like other
input.
So no audio cable from drive to sound card would be needed.


Brian wrote:
> It is worth noting that local access to the /dev/sr* device does
> not depend on being a member of the cdrom group, Using 'ls -l':
>  brw-rw----+ root cdrom 11, 0 June 30 11:15 /dev/sr0
> The "+" is a result of 70-uaccess.rules in /lib/udev/rules.d. It
> indicates an Access Control List (ACL).

... which can be inquired by

  $ getfacl /dev/sr0
  ...
  user:thomas:rw-
  ...

So my desktop user got an extra permission to read and write, regardless
of group membership or "others" permission.


Have a nice day :)

Thomas