[FFmpeg-trac] #3455(swresample:new): aresample=matrix_encoding=dplii doesn't downmix backleft and center correctly

FFmpeg trac at avcodec.org
Wed Mar 12 23:31:13 CET 2014


#3455: aresample=matrix_encoding=dplii doesn't downmix backleft and center
correctly
------------------------------------+--------------------------------------
             Reporter:  Peter       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  swresample
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+--------------------------------------

Comment (by Peter):

 peter at Chip /run/media/peter/FRAPs/LetsPlay $ ~/mplayer/ffmpeg/ffmpeg -i
 surround_blbrc.wav -af "aresample=matrix_encoding=dplii" -ac 2
 dplii_blbrc.wav
 ffmpeg version git-2014-03-09-8dfd0e6 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Mar  9 2014 22:53:26 with gcc 4.8.2 (Gentoo 4.8.2 p1.3r1,
 pie-0.5.8r1)
   configuration: --enable-libx264 --enable-gpl
   libavutil      52. 66.101 / 52. 66.101
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 34.100 / 55. 34.100
   libavdevice    55. 11.100 / 55. 11.100
   libavfilter     4.  3.100 /  4.  3.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
 Guessed Channel Layout for  Input Stream #0.0 : 5.1
 Input #0, wav, from 'surround_blbrc.wav':
   Duration: 00:00:01.01, bitrate: 4608 kb/s
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 5.1,
 s16, 4608 kb/s
 File 'dplii_blbrc.wav' already exists. Overwrite ? [y/N] y
 Output #0, wav, to 'dplii_blbrc.wav':
   Metadata:
     ISFT            : Lavf55.34.100
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz,
 stereo, s16, 1536 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
 Press [q] to stop, [?] for help
 size=     189kB time=00:00:01.01 bitrate=1536.6kbits/s
 video:0kB audio:189kB subtitle:0 data:0 global headers:0kB muxing overhead
 0.041252%

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3455#comment:2>
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