[FFmpeg-trac] #2832(undetermined:new): ffmpeg produces audio with glitch

FFmpeg trac at avcodec.org
Fri Dec 6 10:14:22 CET 2013


#2832: ffmpeg produces audio with glitch
-------------------------------------+-------------------------------------
             Reporter:  asukhanov    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by cehoyos):

 Not a regression.
 The output file sounds completely broken, works fine without {{{-async
 1}}}.
 {{{
 $ ffmpeg -i audio_glitch_input.flv -async 1 out.wav
 ffmpeg version N-58755-gaf7562a Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Dec  5 2013 23:36:29 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      52. 56.100 / 52. 56.100
   libavcodec     55. 45.100 / 55. 45.100
   libavformat    55. 22.100 / 55. 22.100
   libavdevice    55.  5.102 / 55.  5.102
   libavfilter     3. 91.100 /  3. 91.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, flv, from 'audio_glitch_input.flv':
   Duration: 00:02:46.84, start: 0.000000, bitrate: 322 kb/s
     Stream #0:0: Audio: mp3, 44100 Hz, mono, s16p, 192 kb/s
 -async is forwarded to lavfi similarly to -af
 aresample=async=1:min_hard_comp=0.100000:first_pts=0.
 Output #0, wav, to 'out.wav':
   Metadata:
     ISFT            : Lavf55.22.100
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono,
 s16, 705 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mp3 -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=   14380kB time=00:02:46.94 bitrate= 705.6kbits/s
 video:0kB audio:14380kB subtitle:0 global headers:0kB muxing overhead
 0.000543%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/2832#comment:10>
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