Republishing it to Youtube

[Azhar Ali]

Hi,

I am trying to republish our stream to Youtube. I have done the following but it does not work.
I have enabled full url and restarted the server

rtmp_transponder_full_url=true

Using client SDK, when we create the stream, we are sending the full Youtube URL

 session.createStream({
        name: 'mystream',..
        rtmpUrl: rtmp://a.rtmp.youtube.com/live2/0w7p-4zjt-xxxx-xxx

nothing happens on youtube.
I also tried to Get on https://ourwcsserver.com:8444/rest-api/push/find_all but get the following message

{
    "exception": "com.flashphoner.rest.server.exception.NotFoundException",
    "path": "/rest-api/push/find_all",
    "error": "Not Found",
    "message": "Not found any transponder",
    "timestamp": 1583424420421,
    "status": 404
}

I called the rest-api/stream/find_all and can see an error in there.

{
        "appKey": "defaultApp",
        "sessionId": "/85.545.555.xx:63848/10.168.0.6:8443-57a1ceb1-757c-4370-b400-b57f4af46bef",
        "mediaSessionId": "4aadc030-5ef9-11ea-bd4a-294846f98a4d",
        "name": "A73531F89E6BCBC2A72A8B08AC33122114E19FFBF89D9DC7D3EF0E85F5DC2287",
        "published": true,
        "hasVideo": true,
        "hasAudio": true,
        "status": "FAILED",
        "sdp": "....",
        "audioCodec": "opus",
        "videoCodec": "H264",
        "info": "Failed by RTMP writer error",
        "record": true,
        "width": 1888,
        "height": 1040,
        "bitrate": 0,
        "minBitrate": 0,
        "maxBitrate": 0,
        "quality": 0,
        "rtmpUrl": "rtmp://a.rtmp.youtube.com/live2/0w7p-xxx-mgt3-4ypq",
        "history": false,
        "gop": 0,
        "fps": 0,
        "audioBitrate": 0,
        "codecImpl": "",
        "transport": "UDP",
        "cvoExtension": false,
        "createDate": 1583423537842,
        "mediaProvider": "WebRTC",
        "origin": "https://oursite.com"
    }

Is there anything else we need to enable?
Can I check any logs to see if there is any error?

 

[AzharAli83]

I did some more digging into and got it working. It was working in the webrtc-as-rtmp-republishing.html on our server so I started to compare the code and in the end, it seems to be down to record property on createStream, if i set that to false, video streams to youtube, and true does not.
Would you be able to confirm this?

Also when you stream to youtube, I am sending the constraints as 1280x720 but youtube is complaining the res is 420x380 and it needs to be 1280x720, how can I resolve that?

 

[Max]

Good day.

Would you be able to confirm this?

We made some tests on latest build 5.2.548 and can't reproduce the issue. What we've done:
1. Set the folloeing parameters

rtmp_transponder_full_url=true
rtmp_transponder_stream_name_prefix=

2. Tweak WebRTC as RTMP example as follows

function startStreaming(session) {
    var streamName = field("streamName");
    var rtmpUrl = field("rtmpUrl");
    session.createStream({
        name: streamName,
        display: localVideo,
        cacheLocalResources: true,
        receiveVideo: false,
        receiveAudio: false,
        rtmpUrl: rtmpUrl,
        record: true
        ...
    }).publish();
}

3. Publish a stream to external server

I also tried to Get on https://ourwcsserver.com:8444/rest-api/push/find_all but get the following message

This REST API query returns only transponders started with REST API /push/startup query which we recommend to use rather than WebSDK in this case. You can check if stream is republished with netstat command

netstat -np | grep ESTABLISHED
...
tcp 0 8058 your_server:33002 rtmp_server:1935 ESTABLISHED 10107/java
...

Also when you stream to youtube, I am sending the constraints as 1280x720 but youtube is complaining the res is 420x380 and it needs to be 1280x720, how can I resolve that?

WebRTC can drop stream publishing resolution due to actual channel quality and bandwidth. So you have to check channel to server quality, for example using this method.
You can also check actual stream publishing resolution with /stream/metrics REST API query.