Re: [Audacity-devel] Importing videos with PCM audio

[LRN <lr...@gm...>]

Gale Andrews wrote:
> | From LRN<lr...@gm...>
> | Mon, 11 Aug 2008 12:42:50 +0400
> | Subject: [Audacity-devel] Importing videos with PCM audio
>    
>> Gale Andrews wrote:
>>      
>>> I don't doubt it - but what happens with "all supported files" filter?
>>>
>>> Will it help if I put up an example of an mpg file that freezes Audacity?
>>>
>>>
>>>        
>> Yes.
>>      
>
> The following  file freezes Audacity every time for me if I import it
> with the "all supported files" filter (after getting half way through
> the import progress dialogue):
> http://www.sendspace.com/file/rux3tg
>
>    
ImportMP3.cpp, lines 49-56:
static const wxChar *exts[] =
{
    wxT("mp3"),
    wxT("mp2"),
    wxT("mpg"),
    wxT("mpeg"),
    wxT("mpa")
};

So, MP3 importer claims that it supports mpg extension, and since 
ImportMP3 plugin comes before ImportFFmpeg plugin, Importer stumbles 
upon it first. Because of known ImportMP3 bug (ImportMP3 can't tell 
whether a particular file is mp3 or not) probing always succeeds and 
importing begins. Now, for some files importing fails very shortly and 
Importer then tries another plugin. But for other files it doesn't.