[FFmpeg-devel] AAC LATM problem

[John Stebbins]

I have a problem with a file that has AAC LATM audio.  ffplay can't play it.  I'm wondering if this is a bug or just one
of the flavours of LATM that ffmpeg doesn't support.  mplayer plays this file, though it does print some warnings. I've
uploaded the sample to:
ftp://fmpeg.org/MPlayer/incoming/aac_latm_channel_element_problem

Here's the output I see from ffplay:

FFplay version git-59e2118, Copyright (c) 2003-2011 the FFmpeg developers
  built on Jan 18 2011 08:36:36 with gcc 4.5.1 20100924 (Red Hat 4.5.1-4)
  configuration:
  libavutil     50.36. 0 / 50.36. 0
  libavcore      0.16. 1 /  0.16. 1
  libavcodec    52.108. 0 / 52.108. 0
  libavformat   52.94. 0 / 52.94. 0
  libavdevice   52. 2. 3 / 52. 2. 3
  libavfilter    1.74. 0 /  1.74. 0
  libswscale     0.12. 0 /  0.12. 0
[aac @ 0x7fd96c0010e0] channel element 1.0 is not allocated
    Last message repeated 236 times
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fd96c003af0] max_analyze_duration reached
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/jstebbins/Videos/Samples/aac-0channels.mov':
  Metadata:
    major_brand     : qt 
    minor_version   : 512
    compatible_brands: qt 
    creation_time   : 1970-01-01 00:00:00
    encoder         : Lavf52.31.0
    encoder-eng     : Lavf52.31.0
  Duration: 00:00:06.37, start: 0.000000, bitrate: 3363 kb/s
    Stream #0.0(eng): Video: h264, yuv420p, 1280x720, 4153 kb/s, 24.14 fps, 23.98 tbr, 2997 tbn, 5994 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
    Stream #0.1(eng): Audio: aac, 0 channels, s16, 119 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
[aac @ 0x7fd96c0010e0] channel element 1.0 is not allocated
    Last message repeated 298 timesB vq=  786KB sq=    0B f=0/0   f=0/0  
[h264 @ 0x7fd96c0008c0] concealing 2250 DC, 2250 AC, 2250 MV errors
   6.36 A-V:  0.441 s:6.0 aq=    0KB vq=    0KB sq=    0B f=0/0  




Here's the output from mplayer:

MPlayer SVN-r32050-4.4.4 (C) 2000-2010 MPlayer Team

Playing /home/jstebbins/Videos/Samples/aac-0channels.mov.
Cache fill:  0.00% (0 bytes)  

libavformat file format detected.
[aac @ 0x365c5b0] channel element 1.0 is not allocated
    Last message repeated 236 times
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3659590] max_analyze_duration reached
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang eng
VIDEO:  [H264]  1280x720  24bpp  23.976 fps  4153.1 kbps (507.0 kbyte/s)
Clip info:
 major_brand: qt 
 minor_version: 512
 compatible_brands: qt 
 encoder: Lavf52.31.0
 encoder-eng: Lavf52.31.0
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)

Unsupported LATM configuration: 1 programs/ 13 subframes, 3 layers, allstreams: 0

Unsupported LATM configuration: 1 programs/ 13 subframes, 3 layers, allstreams: 0
AUDIO: 44100 Hz, 2 ch, s16le, 119.1 kbit/8.44% (ratio: 14889->176400)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Starting playback...
Movie-Aspect is undefined - no prescaling applied.
VO: [vdpau] 1280x720 => 1280x720 Planar YV12
A:   1.7 V:   1.8 A-V: -0.053 ct: -0.221   0/  0 17%  4%  2.2% 0 0 1%