Webrtc ! webcamera can't receive echo show Binding Request

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This question was closed Sep 23 at 09:14 AM by wilson for the following reason: The question is answered, right answer was accepted

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wilson asked · Aug 28 at 02:05 PM

Webrtc ! webcamera can't receive echo show Binding Request

Skill Id：amzn1.ask.skill.bb78a536-559f-4bcf-85d5-13e011b65a7a

I am trying to use newly added Alexa.RTCSessionController interface on Echo show to receive live video streaming from a WebRTC enabled camera。

I am using the lambda to forward the sdp offer coming from Alexa to my streaming server(which supports WebRTC), After receiving an sdp answer from the server I forward this as a response back to Alexa (AnswerGeneratedForSession event).

However , I never received "SessionConnected" directive , after about 15 seconds I received "SessionDisconnected" directive two times.

I have ignored "SessionConnected" directive and connect to echo-show IP and port that the offer sdp provided. I send STUN binding request to echo-show and received success response. but when I wait for the echo-show's binding request ,and never receive the request.

web camera ----------------------/---------------------echo show

STUN request ------------------------------------------------>

<----------------------------------------------------------- STUN response

the flowing is missed

<- ---------------------------------------------------------STUN request

STUN response ------------------------------------------->

Thanks for any pointers

echo show

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Answer 1 · 2019-08-30T14:00:31Z

barry@amazon answered · Aug 30 at 02:00 PM

Hello and thank you for your message.

I tried to reproduce the issue you described, but when I tried to perform the account linking with the credentials present in your skill description, it failed.

Can you please take a look at this so I can help you further?

Regards,
Barry

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wilson · Sep 03 at 02:43 PM

thanks for your response.

there are three questiones.

(1) I have put the account to the skill description that created the skill. could you take a look use the account.

(2) I used the lambda forward the echo show's request to our webrtc gateway. and the language is .Net core 2.1, is this language ok?

(3) Is the "SessionConnected" directive is necessary ? if it is not necessary when web camera received the echo show's offer sdp and connect to echo show's candidate immediately , but the echo show have not received the web camera's answer sdp yet, so the echo show not got the web camera's ufrag and pwd. is this right?

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Webrtc ! webcamera can't receive echo show Binding Request

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