[asterisk-bugs] [JIRA] (ASTERISK-29183) Audio/Video Codecs: Format attributes get lost.

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=252846#comment-252846 ] 

Asterisk Team commented on ASTERISK-29183:
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Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution. Please note that log messages and other files should not be sent to the Sangoma Asterisk Team unless explicitly asked for. All files should be placed on this issue in a sanitized fashion as needed.

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> Audio/Video Codecs: Format attributes get lost.
> -----------------------------------------------
>
>                 Key: ASTERISK-29183
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29183
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: . I did not set the category correctly.
>    Affects Versions: 16.15.0, 18.1.0
>            Reporter: Alexander Traud
>
> In June, a discussion started about a new, still upcoming Advanced Codec Negotiation (ACN; [mailing list|http://lists.digium.com/pipermail/asterisk-dev/2020-June/thread.html], [blog post|https://www.asterisk.org/asterisk-acn-advanced-codec-negotiation/], [wiki entry|https://wiki.asterisk.org/wiki/display/AST/PJSIP+Advanced+Codec+Negotiation]). Because I am leaving the Asterisk platform, just a note that Asterisk has not only problems with format negotiation but also preserving format attributes. Missing attributes heavily affect the overall negotiation, for example to get things working like in ASTERISK-29182 would not be possible at all.
> Actually, I hacked format-attribute preserving into Asterisk years ago to get my AMR modules working. Although those hacks went into Asterisk, still scenarios exist which still loose the format attributes ([example|https://github.com/traud/asterisk-amr/issues/8#issuecomment-260714794]). Long story short: As of today, Asterisk was not designed to preserve format attributes in any bridge.



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