[FFmpeg-trac] #3234(FFmpeg:new): Eval in volume filter problem

[FFmpeg]

#3234: Eval in volume filter problem
--------------------------------+--------------------------------------
             Reporter:  Ajaja   |                     Type:  defect
               Status:  new     |                 Priority:  normal
            Component:  FFmpeg  |                  Version:  git-master
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
--------------------------------+--------------------------------------
 Summary of the bug:
   ffmpeg can not eval - and + operatoors in volume filter

 How to reproduce:
 {{{
 d:\>ffmpeg -i input.flac -af volume=0.1+0.2 output.flac
 ffmpeg version N-59275-g9b195dd Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Dec 21 2013 22:06:20 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex
 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-
 aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
 --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid
 --enable-zlib
   libavutil      52. 58.101 / 52. 58.101
   libavcodec     55. 45.103 / 55. 45.103
   libavformat    55. 22.100 / 55. 22.100
   libavdevice    55.  5.102 / 55.  5.102
   libavfilter     4.  0.100 /  4.  0.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, flac, from 'input.flac':
   Metadata:
     track           : 1
   Duration: 00:04:26.59, bitrate: 756 kb/s
     Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
 [volume @ 00000000026b98c0] [Eval @ 000000000022a9c0] Undefined constant
 or missing '(' in ''
 [volume @ 00000000026b98c0] Unable to parse option value "+0.2"
 [volume @ 00000000026b98c0] [Eval @ 000000000022aa10] Undefined constant
 or missing '(' in ''
 [volume @ 00000000026b98c0] Unable to parse option value "+0.2"
 [volume @ 00000000026b98c0] Error setting option volume to value 0.1+0.2.
 [Parsed_volume_0 @ 00000000026d0300] Error applying options to the filter.
 [AVFilterGraph @ 00000000026733c0] Error initializing filter 'volume' with
 args '0.1+0.2'
 Error opening filters!
 }}}

 {{{
 d:\>ffmpeg -i input.flac -af volume=sin(-0.1) output.flac
 ffmpeg version N-59275-g9b195dd Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Dec 21 2013 22:06:20 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray
 --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex
 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-
 aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
 --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid
 --enable-zlib
   libavutil      52. 58.101 / 52. 58.101
   libavcodec     55. 45.103 / 55. 45.103
   libavformat    55. 22.100 / 55. 22.100
   libavdevice    55.  5.102 / 55.  5.102
   libavfilter     4.  0.100 /  4.  0.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, flac, from 'input.flac':
   Metadata:
     track           : 1
   Duration: 00:04:26.59, bitrate: 756 kb/s
     Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
 File 'output.flac' already exists. Overwrite ? [y/N] y
 [volume @ 000000000034b200] [Eval @ 000000000022a9c0] Undefined constant
 or missing '(' in ''
 [volume @ 000000000034b200] Unable to parse option value "sin(-0.1)"
 [volume @ 000000000034b200] [Eval @ 000000000022aa10] Undefined constant
 or missing '(' in ''
 [volume @ 000000000034b200] Unable to parse option value "sin(-0.1)"
 [volume @ 000000000034b200] Error setting option volume to value
 sin(-0.1).
 [Parsed_volume_0 @ 0000000002787ea0] Error applying options to the filter.
 [AVFilterGraph @ 0000000000303320] Error initializing filter 'volume' with
 args 'sin(-0.1)'
 Error opening filters!
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3234>
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