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

Aurelien Jacobs aurel
Sat Jun 13 23:18:37 CEST 2009

On Sat, Jun 13, 2009 at 09:45:46PM +0100, Patrice Bensoussan wrote:
> 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?

I've already approved the patch. Justin can commit it whenever he want.


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