How does NACK work in WebRTC?

[Andriy Buchynskyy]

I would like to ask how does NACK work in webrtc. I know that we can receive NACK packets. But I don't know if we need to resend rtp packets manually or it done automatically by webrtc and we just need to enable or disable NACK. Also i don't know if it's enabled from the beginning. From sdp I see that there is something like

a=rtcp-fb:96 nack

a=rtcp-fb:96 nack pli

I'm not sure but from these lines I understand that NACK is enabled. So if yes, do I need to resend rtp packets manually or it done automatically by webrtc? Thank you for any help.

[Kaiduan Xie]

webrtc stack resends RTP packets.

/Kaiduan

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[Andriy Buchynskyy]

Thank you for reply. Can you tell me how I can disable NACK?

[Kaiduan Xie]

try to remove nack in the SDP.

To view this discussion on the web visit https://groups.google.com/d/msgid/discuss-webrtc/24d0ddf5-8217-4489-aeb8-96d1014ccc13%40googlegroups.com.

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[Andriy Buchynskyy]

OK, will try. Thanks