tags 665732 + wontfix
thanks
Hello,
Unfortunately, changing volume with ALSA is intrinsically slow because ALSA
does not support volume internally. If this is a problem for you, you can
either reduce the VLC caching values, or use PulseAudio.
I believe there are no ways to fix this without changing the configuration,
hence wontfix.
Le mardi 15 mai 2012 17:26:51, Dirk Griesbach a écrit :
> reopen 665732
> Package: vlc
> Version: 2.0.1-4+b2
>
> I reopened the bug because it's not just about a minimal latency or a
> long standing behavior. Under certain circumstances, the delay is in the
> range of 10th of seconds and this definitely wasn't the case with pre
> 2.0 vlc. I found a report[1] in the vlc forum which sounds like the same
> problem so we should try to find the culprit.
>
> My observation so far:
>
> * I absolutely can not recognize any delay with ogg audio files.
> * volume change while playing wav or mp3 introduces a variable delay of
> multiple seconds - I even had the 30 second experience like in the
> linked forum thread.
> * This is not only related to the volume change but the whole GUI is
> stalled. No reaction on menu or button press actions.
> * With some other cpu load, the delay will vanish (or at least be
> minimized). E.g. playing another file in one instance and playing the
> delaying mp3 in another instance (no dbus invoked); or simple do a
> `cat /dev/zero > /dev/null`
> * If the system is idling again (apart from playing mp3), the delay is
> back again, too.
> * Doing some click-e-di-click on the desktop while waiting for the GUI and
> sound to respond causes the GUI to react and the volume to change.
> * No remarkable delay with the vlc web interface
> * and last but not least: Pause the song, change volume, resume playing.
> No delay except for the pause-play part. ;-)
>
> For me it looks like some event/timer stuff isn't working as it should
> be and maybe it's just only the Qt-interface?
>
> Regards,
> Dirk
>
> [1] http://forum.videolan.org/viewtopic.php?f=13&t=98180&p=327950#p327950
>
> -- System Information:
> Debian Release: wheezy/sid
> APT prefers unstable
> APT policy: (500, 'unstable')
> Architecture: i386 (i686)
>
> Kernel: Linux 3.2.0-2-686-pae (SMP w/2 CPU cores)
> Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
>
> Versions of packages vlc depends on:
> ii libaa1 1.4p5-39
> ii libavcodec53 6:0.8.2-1
> ii libavutil51 6:0.8.2-1
> ii libc6 2.13-32
> ii libfreetype6 2.4.9-1
> ii libfribidi0 0.19.2-3
> ii libgcc1 1:4.7.0-8
> ii libgl1-mesa-glx [libgl1] 8.0.2-2
> ii libice6 2:1.0.8-2
> ii libqtcore4 4:4.8.1-1
> ii libqtgui4 4:4.8.1-1
> ii libsdl-image1.2 1.2.12-2
> ii libsdl1.2debian 1.2.15-3
> ii libsm6 2:1.2.1-2
> ii libstdc++6 4.7.0-8
> ii libtar0 1.2.11-8
> ii libva-x11-1 1.0.15-4
> ii libva1 1.0.15-4
> ii libvlccore5 2.0.1-4+b2
> ii libx11-6 2:1.4.99.901-2
> ii libxcb-composite0 1.8.1-1
> ii libxcb-keysyms1 0.3.8-1
> ii libxcb-randr0 1.8.1-1
> ii libxcb-render0 1.8.1-1
> ii libxcb-shape0 1.8.1-1
> ii libxcb-shm0 1.8.1-1
> ii libxcb-xfixes0 1.8.1-1
> ii libxcb-xv0 1.8.1-1
> ii libxcb1 1.8.1-1
> ii libxext6 2:1.3.1-2
> ii libxinerama1 2:1.1.2-1
> ii libxpm4 1:3.5.10-1
> ii ttf-freefont 20100919-1
> ii vlc-nox 2.0.1-4+b2
> ii zlib1g 1:1.2.7.dfsg-1
>
> Versions of packages vlc recommends:
> ii vlc-plugin-notify <none>
> ii vlc-plugin-pulse <none>
> ii xdg-utils 1.1.0~rc1+git20111210-6
>
> Versions of packages vlc suggests:
> pn videolan-doc <none>
>
> -- no debconf information
--
Rémi Denis-Courmont
http://www.remlab.net/
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