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

Aurelien Jacobs aurel
Fri May 29 14:29:26 CEST 2009


On Thu, May 28, 2009 at 09:20:15PM -0400, David Conrad wrote:
> On May 28, 2009, at 9:11 PM, Justin Ruggles wrote:
>
>> Ramiro Polla wrote:
>>> Hi,
>>>
>>> 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?
>>
>> 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.
>
> Are case changes needed? I thought the default was case-insensitive  
> compare.

Indeed, we use case-insensitive compare, so case changes are not
strictly needed for decoders. But they could be useful for encoders
so that metadata is stored with the standard casing for the relevant
container.

Aurel



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