Bug#697121: vlc: sudden very loud sound to cause hearing demage

fermat fermat618 at gmail.com
Tue Jan 1 15:22:57 UTC 2013

Package: vlc
Version: 2.0.3-4
Severity: important

Dear Maintainer,

I use a little ear-phone on my computer, and adjust the system volume to about
20%, which is comfortable. I open the VLC player and want to adjust the volume
a little higher. VLC displays the current volume is 100%, so I adjust it to
147%, and I heared a very loud sound I have never imaged. It turned out that
VLC adjust the system volume from 20% to 147%, while the volume 100% it
displays is entirely false and misleading. I think my hearing is hurt since my
ear is rather uncomfortable since then.

I think this is bug both of pulse audio and vlc, so I report bug on both
pulseaudio and vlc.

It is a bug of pulseaudio because it use a default setting that applications
don't have independent volume control. otherwise the volume whill not grow to
147% but rather 20%*147% = 29.4%.

It is apperently a bug of vlc because it displays a very misleading current
volume 100% rather of 20%. Even if some adjust to the volume from 100% to 95%,
it will cause the volume suddenly jumps from 20% to 95%.

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=zh_CN.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages vlc depends on:
ii  dpkg                      1.16.9
ii  fonts-freefont-ttf        20120503-1
ii  libaa1                    1.4p5-40
ii  libavcodec53              6:0.8.4-1
ii  libavutil51               6:0.8.4-1
ii  libc6                     2.13-37
ii  libcaca0                  0.99.beta18-1
ii  libfreetype6              2.4.9-1
ii  libfribidi0               0.19.2-3
ii  libgcc1                   1:4.7.2-4
ii  libgl1-mesa-glx [libgl1]  8.0.5-3
ii  libice6                   2:1.0.8-2
ii  libqtcore4                4:4.8.2+dfsg-2
ii  libqtgui4                 4:4.8.2+dfsg-2
ii  libsdl-image1.2           1.2.12-2
ii  libsdl1.2debian           1.2.15-5
ii  libsm6                    2:1.2.1-2
ii  libstdc++6                4.7.2-4
ii  libtar0                   1.2.16-1
ii  libva-x11-1               1.0.15-4
ii  libva1                    1.0.15-4
ii  libvlccore5               2.0.3-4
ii  libx11-6                  2:1.5.0-1
ii  libxcb-composite0         1.8.1-2
ii  libxcb-keysyms1           0.3.9-1
ii  libxcb-randr0             1.8.1-2
ii  libxcb-render0            1.8.1-2
ii  libxcb-shape0             1.8.1-2
ii  libxcb-shm0               1.8.1-2
ii  libxcb-xfixes0            1.8.1-2
ii  libxcb-xv0                1.8.1-2
ii  libxcb1                   1.8.1-2
ii  libxext6                  2:1.3.1-2
ii  libxinerama1              2:1.1.2-1
ii  libxpm4                   1:3.5.10-1
ii  vlc-nox                   2.0.3-4
ii  zlib1g                    1:1.2.7.dfsg-13

Versions of packages vlc recommends:
ii  vlc-plugin-notify  2.0.3-4
ii  vlc-plugin-pulse   2.0.3-4
ii  xdg-utils          1.1.0~rc1+git20111210-6

Versions of packages vlc suggests:
pn  videolan-doc  <none>

Versions of packages vlc-nox depends on:
ii  dpkg                   1.16.9
ii  liba52-0.7.4           0.7.4-16
ii  libasound2             1.0.25-4
ii  libass4                0.10.0-3
ii  libavahi-client3       0.6.31-1
ii  libavahi-common3       0.6.31-1
ii  libavc1394-0           0.5.4-1
ii  libavcodec53           6:0.8.4-1
ii  libavformat53          6:0.8.4-1
ii  libavutil51            6:0.8.4-1
ii  libbluray1             1:0.2.2-1
ii  libc6                  2.13-37
ii  libcddb2               1.3.2-3
ii  libcdio13              0.83-4
ii  libcrystalhd3          1:0.0~git20110715.fdd2f19-7
ii  libdbus-1-3            1.6.8-1
ii  libdc1394-22           2.2.0-2
ii  libdca0                0.0.5-5
ii  libdirac-decoder0      1.0.2-6
ii  libdirac-encoder0      1.0.2-6
ii  libdirectfb-1.2-9
ii  libdvbpsi7             0.2.2-1
ii  libdvdnav4             4.2.0+20120524-2
ii  libdvdread4            4.2.0+20120521-2
ii  libebml3               1.2.2-2
ii  libfaad2               2.7-8
ii  libflac8               1.2.1-6
ii  libfontconfig1         2.9.0-7
ii  libfreetype6           2.4.9-1
ii  libfribidi0            0.19.2-3
ii  libgcc1                1:4.7.2-4
ii  libgcrypt11            1.5.0-3
ii  libgnutls26            2.12.20-2
ii  libgpg-error0          1.10-3.1
ii  libiso9660-8           0.83-4
ii  libkate1               0.4.1-1
ii  liblircclient0         0.9.0~pre1-1
ii  liblua5.1-0            5.1.5-4
ii  libmad0                0.15.1b-7
ii  libmatroska5           1.3.0-2
ii  libmodplug1            1:
ii  libmpcdec6             2:0.1~r459-4
ii  libmpeg2-4             0.4.1-3
ii  libmtp9                1.1.3-35-g0ece104-4
ii  libncursesw5           5.9-10
ii  libogg0                1.3.0-4
ii  libpng12-0             1.2.49-1
ii  libpostproc52          6:0.8.4-1
ii  libproxy0              0.3.1-5.1
ii  libraw1394-11          2.0.9-1
ii  libresid-builder0c2a   2.1.1-13
ii  libsamplerate0         0.1.8-5
ii  libschroedinger-1.0-0  1.0.11-2
ii  libshout3              2.2.2-8
ii  libsidplay2            2.1.1-13
ii  libsmbclient           2:3.6.6-3
ii  libspeex1              1.2~rc1-7
ii  libspeexdsp1           1.2~rc1-7
ii  libstdc++6             4.7.2-4
ii  libswscale2            6:0.8.4-1
ii  libtag1c2a             1.7.2-1
ii  libtheora0             1.1.1+dfsg.1-3.1
ii  libtinfo5              5.9-10
ii  libtwolame0            0.3.13-1
ii  libudev0               175-7
ii  libupnp6               1:1.6.17-1.1
ii  libusb-1.0-0           2:1.0.11-1
ii  libv4l-0               0.8.8-3
ii  libvcdinfo0            0.7.24-1+b1
ii  libvlc5                2.0.3-4
ii  libvlccore5            2.0.3-4
ii  libvorbis0a            1.3.2-1.3
ii  libvorbisenc2          1.3.2-1.3
ii  libx264-123            2:0.123.2189+git35cf912-1
ii  libxml2                2.8.0+dfsg1-7
ii  libzvbi0               0.2.33-6
ii  zlib1g                 1:1.2.7.dfsg-13

Versions of packages libvlc5 depends on:
ii  dpkg         1.16.9
ii  libc6        2.13-37
ii  libvlccore5  2.0.3-4

Versions of packages libvlccore5 depends on:
ii  dpkg         1.16.9
ii  libc6        2.13-37
ii  libdbus-1-3  1.6.8-1
ii  vlc-data     2.0.3-4

Versions of packages vlc is related to:
ii  libavutil50  5:0.7.11-0.1
ii  libavutil51  6:0.8.4-1

-- debconf-show failed

More information about the pkg-multimedia-maintainers mailing list