[Mplayer-dvb] Mplayer dvd-rw video play

[Nico]

www.obsidia.supereva.it wrote:

>Dear all,
>I'm writing about an issue commented many times in the forums.
>It's this: when I play the DVD I made from a Vdr recording, I get this error:
>"libdvdread: Could not open device with libdvdcss"
>and
>"libdvdread: can't open /dev/cdrom for reading"
>
>I obtain this when I launch the command:
>"mplayer -dvd 1 -dvd-device /dev/cdrom"
>
>Why?
>The situation is this:
>- All DVDs, from original ones to the dvd-r about my friend's holidays made by win**ws, play just fine.
>- Mplayer 0.90 plays everything just fine.
>- Mplayer 1.0 ... I can't build it.
>
why?

>- Mplayer 0.91 plays everything fine. EXCEPT the dvd-rw or dvd-r I record by dvd+rw-tools's growiso.
>
I use the same drive and the the same program and can  mount both the 
disks and the images via loopback, then play them with mplayer just fine.
I guess you remux the PS/TS stream with dvb-mplex and then  run 
dvdauthor, right?

>
>If I mount /dev/cdrom, then play mplayer -dvd 1 -dvd-device /mnt/cdrom, it works.
>
now dvd://1

>All the file permissions are enabled (777) both in /dev links to my scd0 and the files inside the dvd.
>
>One can answer: "Well, play it after you have mounted it". But I can't do it for a usability issue I'm not going to explain now.
>One othe can answer: "Well, why did you post this here?". And I reply: "because 0.90 version works and 0.91 doesn't. So I hope this
>isn't off-topic".
>
>Now, my question is: could anyone please tell me why mplayer says "can't access /dev/cdrom for reading"?
>  
>
-v + logs ?

>I use LG GSA4040B, firmware 301 updated today.
>Every function of this drive works fine. Except reading its own recorded DVDs.
>"dvd_test" reports no error testing the recorded dvd-r.
>Both win**ws players and set-top-boxes are able to read it.
>Tested medias are:
>- DVD-R branded PRINCO and unbranded; DVD+RW branded TDK.
>- television (vdr) recordings sized 93 and 183 MB.
>Dvdrecord is not able to record, so I use dvd+rw-tools - growisofs.
>
>Please help.
>Thanks to anyone.
>
>Obsidia
>
>  
>
almost the same configuration: GMA 4020B and Princo dvd-rw disks; 
usually I can re-read my recorded disks without problems,
but sometimes I can't (I/O errors at the beginning). It never happens 
with disks burnt with the bundled windows software, which
when recording raise the priority to the top, so that the PC can't do 
anything else then burn; I'm afraid that growisofs (which stays
with normal priority) doesn't report all writing errors, or has some 
bugs, I don't know.
I will retry setting the priority to -19 and see if I can eliminate this 
problem.

Nico