[FFmpeg-user] .m4a metadata

[Joao Bonina]

>________________________________
> From: Lou <lou at lrcd.com>
>To: ffmpeg-user at ffmpeg.org 
>Sent: Thursday, 11 October 2012, 18:10
>Subject: Re: [FFmpeg-user] .m4a metadata
> 
>On Thu, 11 Oct 2012 05:23:28 -0700 (PDT)
>Joao Bonina <bonina_2001 at yahoo.com> wrote:
>
>> Hi,
>> 
>> I'm using ffmpeg on Linux as a decoder for .m4a files. They 
>> play fine, but metadata doesn't seem to be read. It only reads the 
>> creation_time data.
>> 
>> Can anyone help, please?
>> 
>> ffprobe version 0.11.2 Copyright (c) 2007-2012 the FFmpeg developers
>>   built on Oct 10 2012 18:26:07 with gcc 4.7.1
>>  
>>  configuration: --enable-libmp3lame --enable-libtheora --enable-libx264 
>> --disable-libgsm --enable-postproc --disable-libxvid --enable-libfaac 
>> --enable-pthreads --enable-libvorbis --enable-gpl --disable-x11grab 
>> --enable-nonfree
>>   libavutil      51. 54.100 / 51. 54.100
>>   libavcodec     54. 23.100 / 54. 23.100
>>   libavformat    54.  6.100 / 54.  6.100
>>   libavdevice    54.  0.100 / 54.  0.100
>>   libavfilter     2. 77.100 /  2. 77.100
>>   libswscale      2.  1.100 /  2.  1.100
>>   libswresample   0. 15.100 /  0. 15.100
>>   libpostproc    52.  0.100 / 52.  0.100
>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Portugal.m4a':
>>   Metadata:
>>     major_brand     : M4A
>>     minor_version   : 0
>>     compatible_brands: mp42isomM4A
>>     creation_time   : 2012-09-29 15:28:41
>>   Duration: 00:01:28.80, start: 0.000000, bitrate: 608 kb/s
>>     Stream #0:0(und): Audio: alac (alac / 0x63616C61), 44100 Hz, 2 channels, s16, 608 kb/s
>>     Metadata:
>>       creation_time   : 2012-09-29 15:28:41
>> [FORMAT]
>> filename=Portugal.m4a
>> nb_streams=1
>> format_name=mov,mp4,m4a,3gp,3g2,mj2
>> format_long_name=QuickTime/MPEG-4/Motion JPEG 2000 format
>> start_time=0.000000
>> duration=88.800000
>> size=6756165
>> bit_rate=608663
>> TAG:major_brand=M4A
>> TAG:minor_version=0
>> TAG:compatible_brands=mp42isomM4A
>> TAG:creation_time=2012-09-29 15:28:41
>> [/FORMAT]
>
>What metadata are you expecting? Did you use ffmpeg to add the
>metadata? If yes, also include the actual command(s).

Metadata wasn't added with ffmeg. 

mp4Info shows the following, and was expecting also this from ffmpeg:
mp4info version 2.0.0
Portugal.m4a:
ReadChildAtoms: "Portugal.m4a": In atom meta missing child atom hdlr
Track   Type    Info
1       audio   alac, 88.800 secs, 608 kbps, 44100 Hz
ReadChildAtoms: "Portugal.m4a": In atom meta missing child atom hdlr
 Name: Sonhei que estava em Portugal
 Artist: Cristina Branco
 Album: Ulisses
 Track: 1 of 0
 Genre: Fado



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