[Gambas-user] Bug on MediaTagList with some files

[Benoît Minisini]

Le 16/12/2012 04:27, Adrien Prokopowicz a écrit :
> Le Sat, 15 Dec 2012 22:42:29 -0000, Benoît Minisini
> <gambas at ...1...> a écrit:
>
>> Le 16/12/2012 00:34, Adrien Prokopowicz a écrit :
>>> Le Sat, 15 Dec 2012 22:09:31 -0000, Benoît Minisini
>>> <gambas at ...1...> a écrit:
>>>
>>>> Le 15/12/2012 15:46, Adrien Prokopowicz a écrit :
>>>>> Le Sat, 15 Dec 2012 02:28:13 -0000, Benoît Minisini
>>>>> <gambas at ...1...> a écrit:
>>>>>
>>>>>> Le 15/12/2012 03:28, Adrien Prokopowicz a écrit :
>>>>>>> Hi Benoît,
>>>>>>>
>>>>>>> I'm trying to get the tags on each audio file on my music library,
>>>>>>> but
>>>>>>> some files make the MediaTagList._get() function crash with the
>>>>>>> error
>>>>>>> "No
>>>>>>> return value".
>>>>>>>
>>>>>>> As an example, you can try to open and play the following file with
>>>>>>> the
>>>>>>> MediaPlayer example :
>>>>>>>
>>>>>>> http://dl.free.fr/isvWMm7mq
>>>>>>>
>>>>>>> Regards,
>>>>>>>
>>>>>>
>>>>>> It should be fixed in revision #5436.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>
>>>>> It works for that file, but with another one I have a new error
>>>>> message
>>>>> now : "Unsupported property datatype".
>>>>>
>>>>> Here is the file : http://dl.free.fr/niWYCQNM3
>>>>>
>>>>> Regards,
>>>>>
>>>>
>>>> Is it better with revision #5439?
>>>>
>>>
>>> Much better, thanks. :-)
>>>
>>> Just a last little question on gb.media (I'm discovering GStreamer) :
>>> I'd
>>> like to get the tags of all the files in my music folder, and to store
>>> them into a compressed XML file, so that I won't have to fully rescan
>>> the
>>> folder each time I start my app.
>>>
>>> The only way I found to retreive the tags is to have a second
>>> MediaPlayer
>>> in background, to set its URL property and to call its Pause() method.
>>> When I see that the player has reached the Pause state (with the State
>>> event), I stop the player and then repeat the process for the next file.
>>>
>>> Do you know if there is a "cleaner" method (that doesn't open and close
>>> an
>>> audio stream for each file and make PulseAudio overloaded) ?
>>>
>>> Thanks in advance (and for your work). :-)
>>>
>>> Regards,
>>>
>>
>> The tags are emitted while the media is playing in GStreamer, so try to
>> replace the audio output of the MediaPlayer by some GStreamer element
>> that does nothing (look in the documentation, it must exist). That way,
>> you won't send any sound anywhere.
>>
>> Otherwise I don't know if there is another way with GStreamer.
>>
>> Regards,
>>
>
> Yes, that works much faster (with the "fakesink" element), thank you !
> Just a note : I can't create a MediaControl without a parent (it gives me
> a Null Object error) but the parent parameter is marked as optional. So as
> a workaround I have to create a "dummy" mediaplayer that will actually
> contain my fake output element.

Why don't you create the fakesink element directly into the MediaPlayer 
instead of using another one?

>
> And in the IDE (I don't know either if this is a bug), when the Null
> object occurs into the declaration part of the class (or outside of any
> function/procedure), the balloon pops out somewhere inside the stack
> backtrace panel. (I first thought that the IDE itself was crashing ...)
>
> Regards,
>

Do you have a screenshot ? Or send me a mail in french with more details...

-- 
Benoît Minisini