Hello,

Can anyone help with an issue regarding the H264 profile level being passed through Asterisk? We have a video call like this:

Caller A -> Asterisk -> Called B

Caller A’s INVITE SDP offers “profile-level-idB801f”, and Called B
replies a 200 OK containing “profile-level-idB801e” in its SDP. Note that this ends with an ‘e’ rather than an ‘f’. The problem is that Asterisk forwards the 200 OK to Caller A with “profile-level-idB801f” in the SDP, so not what Called B sent. Caller A then starts transmitting video in a resolution that Called B can’t handle, and the video is displayed as blank.

My question is, since Asterisk doesn’t do video transcoding, why doesn’t it pass though Called B’s “profile-level-idB801e” unchanged? If it did then Caller A might use a resolution that Called B can handle. We are using Asterisk 11.25.3.

Thanks in advance for any assistance.