Decoding an aac sample fail with scalefactor error

[JasonZhang]

Summary of the bug:
When I playback this source file with ffplay,some error occur.
the report here:
ffplay started on 2018-01-02 at 19:40:22
Report written to "ffplay-20180102-194022.log"
Command line:

ffplay aac_scalefactor_error.mp4 -report
ffplay version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2003-2017 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --e  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
[matroska,webm @ 0x7fb4cc009280] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
st:1 removing common factor 1000000 from timebase
[matroska,webm @ 0x7fb4cc009280] Before avformat_find_stream_info() pos: 551334 bytes read:65541 seeks:3
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[h264 @ 0x7fb4cc0010a0] no picture 
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
[matroska,webm @ 0x7fb4cc009280] first_dts 135 not matching first dts NOPTS (pts 95, duration 0) in the queue
[matroska,webm @ 0x7fb4cc009280] All info found
[matroska,webm @ 0x7fb4cc009280] After avformat_find_stream_info() pos: 888006 bytes read:409482 seeks:3 frames:84
Input #0, matroska,webm, from 'aac_scalefactor_error.mp4':
  Metadata:
    encoder         : DirectShow Matroska Muxer
    creation_time   : 2017-12-28 16:20:38
  Duration: 02:59:05.80, start: 0.000000, bitrate: 120 kb/s
    Stream #0:0(eng), 44, 1/1000: Video: h264 (High), yuv420p(tv, bt709), 1280x720, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
    Stream #0:1(eng), 40, 1/1000: Audio: aac (LC), 22050 Hz, stereo, fltp (default)
detected 1 logical cores
[ffplay_abuffer @ 0x7fb4cc012a00] Setting 'sample_rate' to value '22050'
[ffplay_abuffer @ 0x7fb4cc012a00] Setting 'sample_fmt' to value 'fltp'
[ffplay_abuffer @ 0x7fb4cc012a00] Setting 'channels' to value '2'
[ffplay_abuffer @ 0x7fb4cc012a00] Setting 'time_base' to value '1/22050'
[ffplay_abuffer @ 0x7fb4cc012a00] Setting 'channel_layout' to value '0x3'
[ffplay_abuffer @ 0x7fb4cc012a00] tb:1/22050 samplefmt:fltp samplerate:22050 chlayout:0x3
[ffplay_abuffersink @ 0x7fb4cc037d40] auto-inserting filter 'auto-inserted resampler 0' between the filter 'ffplay_abuffer' and the filter 'ffplay_abuffersink'
[AVFilterGraph @ 0x7fb4cc1fcfc0] query_formats: 2 queried, 0 merged, 3 already done, 0 delayed
[auto-inserted resampler 0 @ 0x7fb4cc0488e0] [SWR @ 0x7fb4cc1b4de0] Using fltp internally between filters
[auto-inserted resampler 0 @ 0x7fb4cc0488e0] ch:2 chl:stereo fmt:fltp r:22050Hz -> ch:2 chl:stereo fmt:s16 r:22050Hz
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] invalid band type
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of bands (17) exceeds limit (15).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of bands (17) exceeds limit (15).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (46) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of bands (16) exceeds limit (15).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (46) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] invalid band type
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (46) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of bands (21) exceeds limit (15).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of bands (22) exceeds limit (15).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] invalid band type
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (46) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
    nan A-V:    nan fd=   0 aq=    0KB vq=15368KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15365KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15362KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15360KB sq=    0B f=0/0   
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
[aac @ 0x7fb4cc00e600] Number of scalefactor bands in group (45) exceeds limit (43).
    nan A-V:    nan fd=   0 aq=    0KB vq=15376KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15374KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15372KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15361KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15365KB sq=    0B f=0/0   
    nan A-V:    nan fd=   0 aq=    0KB vq=15361KB sq=    0B f=0/0   

How to reproduce:

ffplay aac_scalefactor_error.mp4
built on linux
attached source sample file:​https://yunpan.360.cn/surl_ywMegdSInKi

[JasonZhang]

aac_scalefactor_error.mp4 for ticket #6944

[Carl Eugen Hoyos]

Which player plays audio for this sample?

[JasonZhang]

If needed,here is the complete source sample file:[​​https://yunpan.360.cn/surl_ywMegdSInKi]
User may play the source sample file with ffplay,vlc or QQ影音
When i play with ffplay,i got this error:
Number of scalefactor bands in group (45) exceeds limit (43)

I want to know how to fix it and why?

thx

[Carl Eugen Hoyos]

Which player plays audio for this sample?

[JasonZhang]

No player can plays this audio
thx

[Carl Eugen Hoyos]

Then why do you think that something can be improved in FFmpeg for this file?