[FFmpeg-trac] #1041(avcodec:open): Illegal instruction when opening some files with (HE-)AAC streams

FFmpeg trac at avcodec.org
Thu Mar 8 04:36:56 CET 2012


#1041: Illegal instruction when opening some files with (HE-)AAC streams
------------------------------------+-----------------------------------
             Reporter:  qyot27      |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  important   |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  aac         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+-----------------------------------

Comment (by qyot27):

 The new patch still results in silent decoding.  I also tried with the
 unpatched git master since the most recent merge brought that change in,
 and it has the silence issue too.  The output of a decoding operation:

 {{{
 ./ffmpeg_g -v 9 -loglevel 99 -i sample-5.aac -acodec pcm_s16le testaac.wav
 ffmpeg version N-38662-gbf807a5 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Mar  7 2012 22:19:10 with gcc 4.6.1
   configuration: --prefix=/home/qyot27/ffmpeg_build --extra-cflags='-m32
 -DARCH_X86_32' --extra-ldflags=-m32
   libavutil      51. 42.100 / 51. 42.100
   libavcodec     54. 10.100 / 54. 10.100
   libavformat    54.  2.100 / 54.  2.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 63.100 /  2. 63.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  7.100 /  0.  7.100
 [aac @ 0x9133ac0] Format aac probed with size=2048 and score=51
 [aac @ 0x9133ac0] max_analyze_duration 5000000 reached at 5015510
 [aac @ 0x9133ac0] Estimating duration from bitrate, this may be inaccurate
 Input #0, aac, from 'sample-5.aac':
   Duration: 00:00:23.79, bitrate: 95 kb/s
     Stream #0:0, 111, 1/28224000: Audio: aac, 44100 Hz, stereo, s16, 95
 kb/s
 Output #0, wav, to 'testaac.wav':
   Metadata:
     encoder         : Lavf54.2.100
     Stream #0:0, 0, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001),
 44100 Hz, stereo, s16, 1411 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (aac -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=    4096kB time=00:00:23.77 bitrate=1411.2kbits/s
 video:0kB audio:4096kB global headers:0kB muxing overhead 0.001097%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1041#comment:10>
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