OBS WHIP: Support for RTX? #10568
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Hi, I just wanted to make sure I understand how retransmissions work in OBS's WHIP implementation. In the offer generated by OBS there's no "rtx" lines, so I assume that OBS will respond to NACKs by simply sending the exact same packet as the one that was lost (at least according the the sequence numbers from the NACK) once again? If so, isn't this a problem for SRTP and it's replay protection features (the "sliding window")? I'm using OBS 30.1.2 on MacOS. |
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Replies: 2 comments 1 reply
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@Sean-Der question for you |
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Hi @LVala Everything you describe is correct! If the RTX falls outside the sliding window SRTP's replay protection will drop it. In the future I would like to extend libdatachannel to use a distinct SSRC. If you are interested in doing that I would love your help! |
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Thanks for the clarification, I'll see what I can do! |
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Hi @LVala
Everything you describe is correct! If the RTX falls outside the sliding window SRTP's replay protection will drop it.
In the future I would like to extend libdatachannel to use a distinct SSRC. If you are interested in doing that I would love your help!