[mythtv-users] Metadata is generic in v31

Paul Gardiner lists at glidos.net
Wed Sep 23 08:10:00 UTC 2020

On 20/09/2020 18:53, Paul Gardiner wrote:
> On 20/09/2020 17:11, Peter Bennett wrote:
>> On 9/20/20 11:54 AM, Paul Gardiner wrote:
>>> On 20/09/2020 10:05, Paul Gardiner wrote:
>>>> On 20/09/2020 00:28, jam at tigger.ws wrote:>> On 20 Sep 2020, at 1:57 
>>>> am, Paul Gardiner <lists at glidos.net> wrote:
>>>>>> I've recently updated to 31 from 29.1 and so far run into just one 
>>>>>> problem. Metadata looked up from within the video player is now 
>>>>>> generic to the series rather than specific to the episode, so I 
>>>>>> don't see the episode title or the description of what happens in 
>>>>>> the episode. There also seems to be a problem with downloading 
>>>>>> artwork.
>>>>>> Anyone else seen similar?
>>>>> Paul great confusion here. It seems the movie grabber gets 
>>>>> different data at different times.
>>>>> Also I find (and this must be myth)
>>>>> I->Change Video->Retrieve
>>>>> gets generic metadata
>>>>> Whereas menu->scan
>>>>> retrivies specific data
>>>>> but the scan way leaves out some movies and the I way is needed. 
>>>>> Also the I way does not log what it is doing. I'll play with the 
>>>>> logging to see if I can make sense here.
>>>>> What we need is the developer[s] who crafted this feature to spend 
>>>>> a little time polishing the debugging so we can unravel what is 
>>>>> happening. The code is complicated and python is alien as it 
>>>>> contavenes my personal ethos.
>>>> This may be wrong, but the package dependency changes suggest that 
>>>> there may have been a rework of the xml parsing, using a different 
>>>> API. When I get a chance, I'll see if I can find a corresponding 
>>>> commit and try to find anything that looks dodgy.
>>> Looks like the API change was 3 years ago, so I doubt that's what 
>>> caused the problem: I can't see it staying broken for 3 years.
>> Using V31, I have "Preform metadata update after video scan" enabled. 
>> After putting video files into the videos storage group on the 
>> backend, I run mythutil --scanvideos.  It reliably gets the 
>> descriptions of each episode for the series I have loaded into videos. 
>> Do you have the file names set up correctly? I use a directory name 
>> that is the series name and file names that start SnnEnn for example 
>> S01E01.  Sometimes it gets the same artwork for the whole series and 
>> sometimes it gets different artwork for each season. It rarely finds 
>> preview images.
> Actually, it works fine for me if I perform a scan, just as Jam claimed 
> earlier. I get the generic data only if I try to retrieve via
> Info->Change Video->Retrieve: A choice of program matches is displayed,
> and I can choose the correct one (there is only one exact title match). 
> Then, I'd expect to be given the chance to choose Artwork etc., but that
> bit of UI never appears. Could I have part of the installation missing,
> or might the theme have something missing? I'm using Stepps.

I suspect this issue as the cause: 
https://code.mythtv.org/trac/ticket/13518. I see the problem mentioned 
in this issue in my logs, and I think the failure to fetch thumbnails 
may be shortcircuiting some of the code used in selecting best match.

As a cause of the issue, I'm suspicious of: 
In theory, such a change shouldn't cause change in behaviour, but is 
const foolproof?

I'll see if I can track it down further when I get a chance.

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