[asterisk-bugs] [JIRA] (ASTERISK-30051) res_pjsip: No video after un-hold with moh_passthrough=yes

[Friendly Automation (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-30051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Friendly Automation closed ASTERISK-30051.
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    Resolution: Fixed

> res_pjsip: No video after un-hold with moh_passthrough=yes
> ----------------------------------------------------------
>
>                 Key: ASTERISK-30051
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-30051
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: 16.16.0, 18.11.1, 19.3.3
>         Environment: Linux 5.13.0, 20.04.1-Ubuntu, x86_64
>            Reporter: Maximilian Fridrich
>            Assignee: Unassigned
>         Attachments: debug_log_30051.txt, extensions.conf, pjsip.conf, unhold_video_bug_sip.pcapng
>
>
> During a call with audio and video, when one participant holds the call and then un-holds, the participant that initiated the hold sees no video.
> The issue occurs only when {{moh_passthrough=yes}} is set in pjsip.conf.
> It occurs most of the time, however sometimes there is video as expected. Furthermore, when Asterisk is built with the DEBUG_THREADS option, the issue does not occur at all.
> The attached trace shows the un-hold re-INVITE of the UA (packet no. 31) with _sendrecv/sendrecv_, Asterisk sending _sendonly/sendonly_ to the second call leg (no. 33), then sending another re-INVITE to the second call leg with _sendrecv/sendonly_ (no. 36) . So Asterisk is ultimately setting the video stream of the second call leg sendonly from its perspective, which is why the UA of the first leg does not receive video.



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