[FFmpeg-devel] [BUG] Artist and Track Number not converted from flac to mp3

Patrice Bensoussan patrice.bensoussan
Sat Jun 13 22:45:46 CEST 2009

On 30 May 2009, at 00:14, Aurelien Jacobs wrote:

> On Fri, May 29, 2009 at 05:01:11PM -0400, Justin Ruggles wrote:
>> Aurelien Jacobs wrote:
>>> On Fri, May 29, 2009 at 12:19:48AM -0400, Justin Ruggles wrote:
>>>> Ramiro Polla wrote:
>>>>> Hi,
>>>>> On Thu, May 28, 2009 at 10:11 PM, Justin Ruggles
>>>>> <justin.ruggles at gmail.com> wrote:
>>>>>> Ramiro Polla wrote:
>>>>>>> On Thu, May 28, 2009 at 7:18 PM, Patrice Bensoussan
>>>>>>> <patrice.bensoussan at free.fr> wrote:
>>>>>>>> Hello,
>>>>>>>> It seems that the Artist and Track Number info is lost when  
>>>>>>>> converting from
>>>>>>>> flac to mp3. Sample file uploaded in
>>>>>>>> /MPlayer/incoming/MissingTagsWhenConvertingFLAC
>>>>>>>> ffmpeg -i TrackAndArtistMissingAferConversionToMP3.flac - 
>>>>>>>> map_meta_data 0:0
>>>>>>>> file.mp3
>>>>>>>> (same issue when converting to m4a). I tried to have a quick  
>>>>>>>> look at the
>>>>>>>> code, but couldn't find out what the problem is... if anyone  
>>>>>>>> can help and
>>>>>>>> have some time...
>>>>>>> I have this patch in my tree that for some reason hasn't ever  
>>>>>>> been
>>>>>>> submitted. Could you test and see if it still works?
>>>>>> Thanks.  I didn't know that was required.  Is that documented  
>>>>>> somewhere?
>>>>> I have no idea. I just found them on a bunch of files I wanted  
>>>>> to convert...
>>>>>> Also, wouldn't the ogg demuxer need to use the same mapping?   
>>>>>> If so, it
>>>>>> could be put in oggparsevorbis.c/oggdec.h and used in both  
>>>>>> demuxers.
>>>>> It looks like so, but I don't really want to work on this patch (I
>>>>> guess that's why I hadn't submitted it), so whoever applies it can
>>>>> decide where it fits best.
>>>> Well, seeing as how I maintain the FLAC demuxer, I'll pick it  
>>>> up.  Here
>>>> is a modified version of Ramiro's patch.
>>> metadata_conv should also be set for ogg and flac muxers.
>>> Except that, patch is OK.
>> We don't have a vorbiscomment writer.  Should the metadata_conv  
>> stuff be
>> added to the muxers anyway?
> Hum... Then it's not really useful in muxers right now. On the other  
> hand,
> it won't do any harm, and it may incite someone (you ? ;-) to  
> implement
> the vorbiscomment writer...
> So, do whatever you prefer. It's not important right now...

Hi Aurel, have you had any chance to look at  this? is there any more  
changes required before it gets committed?


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