[FFmpeg-trac] #1049(avcodec:open): bad sound (clicks + low pitch / slower speed)

[FFmpeg]

#1049: bad sound (clicks + low pitch / slower speed)
------------------------------------+-----------------------------------
             Reporter:  goblin      |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  aac         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+-----------------------------------
Changes (by cehoyos):

 * status:  new => open
 * component:  undetermined => avcodec
 * reproduced:  0 => 1


Comment:

 Please do not report problems with ffplay if they are also reproducible
 with ffmpeg (ffplay depends on hardware and an external library that is
 known to contain bugs, ffmpeg is mostly self-contained).

 Works fine with mplayer -ac faad.

 out.wav sounds bad:
 {{{
 $ ffmpeg -i tkt_1049_low_pitch_sound.mkv out.wav
 ffmpeg version N-38686-gd07de6d Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Mar 10 2012 13:28:13 with gcc 4.3.2
   configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl
   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
   libpostproc    52.  0.100 / 52.  0.100
 [h264 @ 0x8ebda20] Increasing reorder buffer to 1
 Input #0, matroska,webm, from 'tkt_1049_low_pitch_sound.mkv':
   Metadata:
     title           : [Shinsen-Subs] Ergo Proxy - 02 - Confession of a
 Fellow Citizen
     creation_time   : 2006-03-30 12:06:58
   Duration: 00:26:47.31, start: 0.000000, bitrate: 41 kb/s
     Stream #0:0(jpn): Video: h264 (Main), yuv420p, 1280x720, SAR 1:1 DAR
 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
     Metadata:
       title           : [Shinsen-Subs] Ergo Proxy - 02
     Stream #0:1(jpn): Audio: aac, 48000 Hz, 5.1, s16 (default)
     Metadata:
       title           : Japense Audio 6ch AAC
 Output #0, wav, to 'out.wav':
   Metadata:
     title           : [Shinsen-Subs] Ergo Proxy - 02 - Confession of a
 Fellow Citizen
     creation_time   : 2006-03-30 12:06:58
     encoder         : Lavf54.2.100
     Stream #0:0(jpn): Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 5.1, s16, 4608 kb/s (default)
     Metadata:
       title           : Japense Audio 6ch AAC
 Stream mapping:
   Stream #0:1 -> #0:0 (aac -> pcm_s16le)
 Press [q] to stop, [?] for help
 [aac @ 0x8ebdfa0] Evaluating a further program_config_element.
     Last message repeated 24 times
 size=    7392kB time=00:00:13.14 bitrate=4608.0kbits/s
 [aac @ 0x8ebdfa0] Evaluating a further program_config_element.
     Last message repeated 24 times
 size=   14720kB time=00:00:26.19 bitrate=4603.0kbits/s
 [aac @ 0x8ebdfa0] Evaluating a further program_config_element.
     Last message repeated 9 times
 [matroska,webm @ 0x8eb6aa0] Read error
 [aac @ 0x8ebdfa0] Evaluating a further program_config_element.
     Last message repeated 3 times
 size=   19008kB time=00:00:33.79 bitrate=4608.0kbits/s
 video:0kB audio:19008kB global headers:0kB muxing overhead 0.000349%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1049#comment:3>
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