id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1810	ffprobe: some .m4a files' metatags are not read by ffprobe	movie_fan		"Summary of the bug:
How to reproduce:
{{{
% ffprobe Portugal.m4a
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
}}}


Running ffprobe on alac encoded files (.m4a), only returns the creation_date metadata. Album, artist, title, etc. are not returned.

The mp4v2 tool returns those correctly. Also, AtomicParsley and Mp3tag read the metadata correctly.

Here are the outputs of ffprobe and mp4v2:


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]




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






"	defect	open	normal	avformat	git-master		mov metadata				1	0