audio and video are not sync

[Farzane Sadeghi]

Hi every body
in playback some recorded  voice and video are not sync and video have delay 
what should i do and how can solve it?

[Fred Dixon]

Because the audio and video for BigBlueButton go through different channels, there is a chance (depending on the network) that the capture of the packets are not synced.  

It's something we want to improve in future versions.

Regards,... Fred

--
You received this message because you are subscribed to the Google Groups "BigBlueButton-Setup" group.
To unsubscribe from this group and stop receiving emails from it, send an email to bigbluebutton-s...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/bigbluebutton-setup/103fc614-bb24-42dc-8ef1-5af76321d0c4n%40googlegroups.com.

--

BigBlueButton Developer

http://bigbluebutton.org/

Like BigBlueButton?  Tweet us at @bigbluebutton

[basisbit]

Audio and video being out of sync is usually caused by running BigBlueButton on certain virtual server environments, especially common on VMWare. To reduce the problem for future recordings, disable ntpd on the host and within the VMs, and then only sync the clocks manually using ntp (for example using a cron job) every night when no users are using your BBB server.

The reason is described at https://docs.bigbluebutton.org/2.2/install.html#minimum-server-requirements in the "Why do we recommend a bare metal server" paragraph.

[Farzane Sadeghi]

so thank 

[Fred Dixon]

Thanks basisbit.  Do you have an example of the cron job?

Regards,... Fred

To view this discussion on the web visit https://groups.google.com/d/msgid/bigbluebutton-setup/82a9ab5e-8061-42a5-ba45-6be6f7cee16fn%40googlegroups.com.

[Stefan L.]

Sorry, I don't - we only use dedicated hardware ourselves. However, Google should help.

You received this message because you are subscribed to a topic in the Google Groups "BigBlueButton-Setup" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/bigbluebutton-setup/aenGQp4g8Lc/unsubscribe.
To unsubscribe from this group and all its topics, send an email to bigbluebutton-s...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/bigbluebutton-setup/CAOeuy5OcwXN166AfvwqfvRCXY5SNfS68eOawMqfCZRyskofMYQ%40mail.gmail.com.

[Farzane Sadeghi]

You know just when playback recorded see that problem not when is live 

To view this discussion on the web visit https://groups.google.com/d/msgid/bigbluebutton-setup/24f21d3a-404b-40f6-abea-a1537d45b4dan%40googlegroups.com.

[Am N]

Hi,

I have installed BBB 2.3.15 on dedicate server (HP ProLiant DL360 G7 with 1x Intel(R) Xeon(R) CPU X5650 @ 2.67GHz and 16GB Ram and SAS hard drive) and audio and video of recordings are out of sync . In the meeting everything is ok but recordings have this problem.

root@ubuntu:~# timedatectl status

                      Local time: Mon 2021-11-22 09:47:34 EST

                  Universal time: Mon 2021-11-22 14:47:34 UTC

                        RTC time: Mon 2021-11-22 14:47:34

                       Time zone: America/New_York (EST, -0500)

       System clock synchronized: yes

systemd-timesyncd.service active: yes

                 RTC in local TZ: no

Your advice highly appreciated.

Amir

[basisbit]

Please start a new discussion for that instead of restarting a 10 months old one. Thanks.

Also, please specify if you are running BBB inside a virtual machine / vmware / kvm or similar. As first try, disable and stop the ntp service, restart bbb and see if that fixes / improves it for new meeting recordings.