[mythtv-users] dvd iso playback problem

Dan Littlejohn dan.littlejohn at gmail.com
Fri Jun 28 18:12:15 UTC 2013


Here is the mythfrontend log with the additional logging.  One hint is that
this log is using a intel motherboard videocard, but I have another
frontend that uses an nvidia video card and the both behave the same way.
(used pastebin as this kept bouncing off the list for being too big)

http://pastebin.com/ExwngYRp

Dan



On Thu, Jun 27, 2013 at 12:57 PM, Dan Littlejohn
<dan.littlejohn at gmail.com>wrote:

>
>
> On Thu, Jun 27, 2013 at 5:19 AM, Richard <peper03 at yahoo.com> wrote:
>
>> On 27/06/13 06:22, Dan Littlejohn wrote:
>>
>>>
>>> On Tue, Apr 30, 2013 at 11:26 AM, Richard <peper03 at yahoo.com
>>> <mailto:peper03 at yahoo.com>> wrote:
>>>
>>>     Hi Dan,
>>>
>>>
>>>         2013-04-28 13:33:03.765665 E [2698/2894] Decoder
>>>         DVD/dvdringbuffer.cpp:521 (safe_read) - DVDRB: Failed to read
>>> block:
>>>         Error reading NAV packet.
>>>
>>>
>>>     This error seems to indicate that there was an issue with the data
>>>     from the image.  The library MythTV uses (libdvdnav) to parse the
>>>     DVD data is reporting that a data structure it was expecting wasn't
>>>     found (or was corrupt).  One reason for this could be using
>>>     encrypted ISOs in storage groups across the network, but you said
>>>     your images were all decrypted so unless one has slipped through the
>>>     net, it shouldn't be that.
>>>
>>>     If the data has been corrupted, it poses the question why the image
>>>     plays in other applications (to my knowledge, most use the same
>>>     library, although possibly with their own modifications).  One
>>>     reason may be that some applications attempt to skip the menu and
>>>     jump straight to the main feature.  That could well mean that
>>>     they're not seeing the corrupted data if it's part of the menu.
>>>
>>>     You could try starting the frontend with '-v playback
>>>     --loglevel=debug'.  That will certainly give more data (although not
>>>     from libdvdnav).
>>>
>>>     Are you getting the same problem from the other images that won't
>>> play?
>>>
>>>     Richard.
>>>
>>>     ______________________________**___________________
>>>     mythtv-users mailing list
>>>     mythtv-users at mythtv.org <mailto:mythtv-users at mythtv.**org<mythtv-users at mythtv.org>
>>> >
>>>     http://www.mythtv.org/mailman/**__listinfo/mythtv-users<http://www.mythtv.org/mailman/__listinfo/mythtv-users>
>>>
>>>     <http://www.mythtv.org/**mailman/listinfo/mythtv-users<http://www.mythtv.org/mailman/listinfo/mythtv-users>
>>> >
>>>
>>>
>>> For anyone else having tthe problem of some dvd ISOs not playing in
>>> myth, but working in other players I was able to fix it and keep the iso
>>> format.  What I finally figured out is that you can use the program
>>> "dvd-shrink" to re-author the disk (non-compressed) to create a new iso
>>> container.  All the movies I was having problems with were fixed by
>>> doing this.  Just thought I would pass that along as keeping a single
>>> iso file for a movie is really convenient and I like the myth interface
>>> better than the other players I am using.
>>>
>>
>> I'm glad you've found a solution but it would be interesting to know
>> exactly why those images didn't play.  Did you remove anything (menus,
>> streams etc.) when you ran the images through dvdshrink?
>>
>> If you still have an original image, I'd be interested to see the results
>> of running mythfrontend with the parameters I mentioned before.  If you run
>> it from a command-line, there may be some additional messages from
>> libdvdnav that don't get routed into the normal MythTV logging.
>>
>>
>> Richard.
>> ______________________________**_________________
>> mythtv-users mailing list
>> mythtv-users at mythtv.org
>> http://www.mythtv.org/mailman/**listinfo/mythtv-users<http://www.mythtv.org/mailman/listinfo/mythtv-users>
>>
>
>
> Sure, I will try to run the frontend with the parameters you asked tonite
> (-v playback --loglevel=debug) and post the result.
>
> The old iso just played the movie and I reauthored it the same way.  It
> did show several selectable titles (in the old iso) when I re-authored it,
> but I am pretty sure they all point to the same thing.
>
> Dan
>
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