after starting an iptv stream video and audio are out of sync

[Martin Wolf]

as mentioned above, when i start an iptv stream (german television through t-entertain) the audio and video are totally out of sync ... but it is noticeable that the timedifference between audio and video decays and after 30-40 seconds it is properly synced...
pulse warning: too early by 766216 us
pulse warning: too early by 735351 us
pulse warning: too early by 703468 us
pulse warning: too early by 669821 us
pulse warning: too early by 634963 us
pulse warning: too early by 597772 us

these are sample warnings while watching ...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: vlc 2.0.8-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.5.0-37.58~precise1-generic 3.5.7.16
Uname: Linux 3.5.0-37-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Mon Aug 12 03:04:45 2013
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130214)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: vlc
UpgradeStatus: No upgrade log present (probably fresh install)

[Martin Wolf (mwolf-adiumentum)]

i tested it on two other pcs and i have the same problem ...
so this is really a bug not just my notebook...

[Rémi Denis-Courmont (rdenis)]

What PulseAudio version is used? There is a known bug in PulseAudio 2.x causing VLC audio desync...

[Martin Wolf (mwolf-adiumentum)]

according to pulseaudio --vesion it is 1.1

[Rémi Denis-Courmont (rdenis)]

Oh, that old. Yeah 1.x has latency problems too. VLC should only be used with 0.x or >= 3.0

[Martin Wolf (mwolf-adiumentum)]

well there are no repos for a version >= 3.0
the only repo i found was containing pulse 2.0
https://launchpad.net/~ubuntu-audio-dev/+archive/ppa
 (and it has the same problem as you mentioned ...)

do you have a repo for ubuntu 12.04 LTS?

[Benjamin Drung (bdrung)]

So Ubuntu 12.04 (with pulseaudio 1.1) and Ubuntu 12.10 (with pulseaudio 2.1) are affected by this bug. Ubuntu 13.04 ships pulseaudio 3.0.

[Martin Wolf (mwolf-adiumentum)]

so i have to wait for an updated version of pulseaudio? lets hope it comes before 12.04.4 ...

[Benjamin Drung (bdrung)]

It is very, very unlikely that pulseaudio will be updated to a new upstream release (with the major version bump like 2.0, etc.) in a stable Ubuntu release. But it is possible to fix pulseaudio bugs in Ubuntu 12.04 by backporting fixes to the shipped version.

[Martin Wolf (mwolf-adiumentum)]

can i do something to speed this up?

[Rémi Denis-Courmont (rdenis)]

You can try Ubuntu 13.04 if you want to check if PulseAudio 3.0 addresses the problem (I'm not actually sure). I'd recommend downgrading to PulseAudio 1.1 instead, but I am not sure if that is even possible.

Otherwise, there is probably not much to do, other than wait for the next LTS release.

[Benjamin Drung (bdrung)]

To speed fixing this bug up for Ubuntu 12.04, you could provide a pulseaudio patch. Finding/Getting this patch needs time and skill. You can cherry-pick a fix by finding the commit between pulseaudio 1.1 and 3.0 that changes the behavior for you.

[Martin Wolf (mwolf-adiumentum)]

yes i will install 13.04 since i have some other issues with old versions on 12.04.2 as well.
when this prob is gone i will file it here...

[Martin Wolf (mwolf-adiumentum)]

im sorry that i open this bug again but i made a fresh installation of xubuntu 13.10 and i still have this problem

[Martin Wolf (mwolf-adiumentum)]

im sorry to bug you all but the problem still exists in 13.10 ... and i really dont know how to get some attention :(

[Launchpad Janitor (janitor)]

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]