aiortc/Lobby

WebRTC and ORTC implementation for Python using asyncio

qube13

@qube13

Hey all, I have a short question, that I hope you can maybe guide me in the right direction.

I want to implement a camera-service in python that distributes a live stream of a USB-Camera to other services. I want to do this without an internet connection over the local network. I have two other services that use the stream, a classification service, in python and a front-end that displays the live stream written in html and javascript.

You can find the whole question here: https://stackoverflow.com/questions/56582908/webrtc-connection-on-localhost-without-an-internet-connection

without an internet connection, the streaming with aiortc between the python services works without any problems

but the streaming between the camera service and the front-end in javascript does only work with an internet connection

Jeremy Lainé

@jlaine

"it doesn't work" is usually a poor start to get help :)

Can you describe what does happen? Is SDP exchanged between the peers?

Have you tried running the server in verbose mode?

Is the "server" machine firewalled?

qube13

@qube13

the javascript does not complete the ice gathering

in chrome I dont get any error message but when I run it in Firefox I get the message "ICE failed, see about:webrtc for more detail"

When I comment the part in javascript where the ice gathering is completed:

       return new Promise(function(resolve) {
            if (pc.iceGatheringState === 'complete') {
                resolve();
            } else {
                function checkState() {
                    if (pc.iceGatheringState === 'complete') {
                        pc.removeEventListener('icegatheringstatechange', checkState);
                        resolve();
                    }
                }
                pc.addEventListener('icegatheringstatechange', checkState);

then the sdp is exchanged but the video stream is not transferred

qube13

@qube13

About the firewall I am not sure, but I run everything on localhost on one PC, so I think there should not be any firewall issues

Andrew Kralovec

@AndrewKralovec

Hey guys,

Im new to the project, and was hoping for some advice.
I'm trying to use aiortc allow two clients (browser webcams) to connect to the server, and have the server broadcast both ( and it will only ever be two), video streams to each user. So they can see each other. What example on github would best help me with this ? I was thinking about merging webcam & apprtc. I'll be honest though. Im unsure how to convert the image reciver to a media player. Any advice would be appreciated.

Tomasz Rojek

@trojek

@italojs Did you try to send message to the browser using WebSockets?

You can use socket.io which works both on python and javascript

Tomasz Rojek

@trojek

Does anyone know how to enable hardware acceleration in server example ?

Alexander Kozhevin

@AlexanderKozhevin

Hello, everyone. I want to make a clone of https://golightstream.com/
Is there any reliable way to make WebRTC -> RTMP converter with 720p quality at least. ?

Yury Zhuravlev

@stalkerg

Hello all!

Praveen Mareedu

@NYUTerminal_gitlab

Hi Everyone

I am working on testing aiortc on AWS EC2 servers. I have created a docker of AIORTC and deployed in an ec2 instance .. I want to stream my webcam feed from local Mac to the EC2 instance and back to browser in local machine.

I have opened all kinds of traffic on my Ec2 instance and send UDP packets from local machine to EC2

Praveen Mareedu

@NYUTerminal_gitlab

I am testing the server example and I can load the interface but I think there is a problem with WEBRTC connection establishment.
ICE gathering state: new -> gathering -> complete
ICE connection state: new -> checking -> disconnected
Signaling state: stable -> have-local-offer -> stable
Any idea on how to debug this?

Raghvendra Jain

@raghavendrajain

@italojs Could you solve the problem? I tried using data channels, but it does not send the data continuously in the loop. what to do?

@trojek Hi. I am in same boat as @italojs. I understand how to use WebSockets with browser, but in this case I am unable to send the data from aiortc.

Ivelin Ivanov

@ivelin

I’ve been working on similar problems and have been able to make good progress recently. Ported PeerJS to python. It’s been a battle but well the effort.

https://github.com/ambianic/peerjs-python

Higher level abstraction over Aiortc that addresses signaling.

Raghvendra Jain

@raghavendrajain

Good work @ivelin. I will look into it, thanks!

Sohil

@sohils

Hi, I need help processing a video frames and sending back data in data channels.

arpu

@arpu

Hello i am on fedora 31 and MediaRecorder does not create any file any hint how i can debug this?

arpu

@arpu

found it

does the MediaRecorder always encode the incoming stream? or would it bepossible to forward it without reencoding ( h264)

arpu

@arpu

looks very quite here :> is there a other channel like discord or irc slack ?

Zack Schwartz

@apexdodge

I'm using the server example of aiortc which I got working, but I'd like to stream what I receive at the server side to an RTMP endpoint. Does anyone have any guidance on that?

Nikhil

@necronomican

Hello all, I have raised an issue,

Nikhil

@necronomican

mikeboers/PyAV#619

This is for pyav but hampers the installation for aiortc, did anyone encounter this while installing aiortc?

smandava98

@smandava98

Hi all. I am having trouble install aiortc on Mac. I keep getting this:ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

If anyone has any insight - would love it!

Michael Noronha

@mtn

Hi, I've got a bit of a basic question -- I have a client receiving a sequence of frames (via a VideoStreamTrack) from a server, and I want to process that sequence of frames on the client. I understand how to process them on the server (in recv, right?), but how can I do it on the client?

Michael Noronha

@mtn

The solution I came up with is pretty simple: in my @pc.on("datachannel") and @pc.on("track") handlers, I check if the other one has been initialized. They happen sequentially, so one of them must have both initialized and from there I set up a function that processes them in a loop

I'd be interested to hear about better ways of doing this though

Gerrit

@gerrito333

I run some transformation a aiortc video stream and change the transformation at runtime. The switch to another transformations takes some secs and I end up with an accumulated delay on the stream. Is there a way to skip the queued frames and jump to the latests frame to reduce this delay?

gustavopretto

@gustavopretto

Hi, I'm trying to process with OpenCV and python a live video transmission from a WebRTC site: https://webrtc-streamer.herokuapp.com/webrtcstreamer.html?video=Bahia&options=rtptransport%3Dtcp%26timeout%3D60& But I can't open the video with cv2.videocapture (URL).

How could I open the video that is compatible with OpenCV? I appreciate it if you demonstrate the code.

Ilyas Salhi

@ilyas121

hey everyone, I'm new here and just curious if anyone has done clientjs to serverpy example with multiple datachannels for one peer connection? I modified the example/server in the project's repo to conditionally respons based on the channel label, but I noticed that RTT goes up. Curious if I'm just using asyncio wrong or if anyone has found ways of opening extra channels without hurting latency

Ilyas Salhi

@ilyas121

Interesting thing is that the second channel has the larger RTT's

Wondering if there's a way to thread each datachannel seperately

Ilyas Salhi

@ilyas121

Also its the act of creating two channels that slows things down, increasing the rate of transmission to 2X the original has better RTT's, super interesting

boris-savic

@boris-savic

Hi everyone. I know this might not be the correct channel for this, but just in case. Has anyone had experience with accepting multiple webrtc sources, encoding to a single tiled video output and then republishing via RTMP to twitch/youtube/... ?

If i understand the workflow correctly I would first establish a webrtc connection between server and client applications, use ffmpeg (?) to encode to video and then output to rtmp endpoint. In theory seems simple, just checking if anyone has additional knowledge and is willing to share. Especially with ffmpeg I'm not entierly clear how would I arrange tiles or allow server to receive instructions on how to actually tile the video if new participants are added etc...

boris-savic

@boris-savic

or is this something that could be accomplished with MediaRecorded class ?

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