How to get framerate and resolution in an admission webhook?

[vampirefrog]

Howdy, I'm trying to create a YouTube broadcast and a push as soon as the admission webhook is called, but the YouTube broadcast requires the resolution and framerate. How can I get this info? I tried a GET /v1/vhosts/{vhost}/apps/{app}/streams/{stream} but it returns a 404, probably because the stream hasn't been created yet, before the admission webhook has returned a response. How soon can I get the resolution/frame rate relative to the admission webhook? Thanks.

[bchah]

I see where you are hitting a wall there. How about... can you get the resolution/framerate in advance and submit that to YouTube, using the Conditional Encoder options to correct the res/fps if required?

[vampirefrog]

What I did was a bit more complex. When I receive the admission webhook, I start polling the stream every 2 seconds, until it has the info I need (resolution and frame rate), then I create the post on youtube with POST liveStreams, POST liveBroadcasts, then POST liveBroadcasts/bind, then I start the pushes from OME, then I poll the youtube API GET livestreams until I get an active stream, and then I POST liveBroadcasts/transition to set the status to live.

[vampirefrog]

YouTube does allow you to send variable as the value for framerate and resolution, but I figured I'd implement this flow to support other platforms too, which might require a more complex API flow.

[getroot]

TranscodeWebhook probably works for you

https://airensoft.gitbook.io/ovenmediaengine/transcoding/transcodewebhook

[vampirefrog]

looks good, gonna give it a try, thanks!

[vampirefrog]

Howdy! I've tried this, but I'm getting 0 as the framerate value. Also, I can only get the framerate via v1/vhosts/<vhost>/apps/<vhost>/streams/<name> AFTER I've responded to this webhook. Is this an OME bug, or am I doing something wrong? I'm u sing v0.16.5.

I just need the width, height and framerate as soon as it is available.

It looks like I'll just have to go back to polling for a stream instead of waiting for a webhook.

Example webhook payload below:

{
	"source" : "SRT://127.0.0.1:33963",
	"stream" : 
	{
		"application" : "live",
		"createdTime" : "2024-05-12T23:18:00.915+03:00",
		"name" : "OBcFmBPRGmotqz39AatYQugG0nkTVJ2e",
		"sourceType" : "SRT",
		"sourceUrl" : "SRT://127.0.0.1:33963",
		"tracks" : 
		[
			{
				"id" : 26,
				"name" : "Data",
				"type" : "Data"
			},
			{
				"id" : 256,
				"name" : "Video",
				"type" : "Video",
				"video" : 
				{
					"bitrate" : "0",
					"bypass" : false,
					"codec" : "H264",
					"framerate" : 0.0,
					"hasBframes" : false,
					"height" : 1080,
					"keyFrameInterval" : 0,
					"width" : 1920
				}
			},
			{
				"audio" : 
				{
					"bitrate" : "0",
					"bypass" : false,
					"channel" : 2,
					"codec" : "AAC",
					"samplerate" : 48000
				},
				"id" : 257,
				"name" : "Audio",
				"type" : "Audio"
			}
		],
		"virtualHost" : "default"
	}
}

Server.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<Server version="8">
	<Name>OvenMediaEngine</Name>
	<Type>origin</Type>
	<IP>*</IP>
	<PrivacyProtection>false</PrivacyProtection>
	<Modules>
		<HTTP2><Enable>true</Enable></HTTP2>
		<LLHLS><Enable>true</Enable></LLHLS>
	</Modules>
	<Bind>
		<Managers>
			<API>
				<Port>60080</Port>
				<TLSPort>60443</TLSPort>
				<WorkerCount>1</WorkerCount>
			</API>
		</Managers>
		<Providers>
			<RTMP>
				<Port>61935</Port>
				<WorkerCount>1</WorkerCount>
			</RTMP>
			<SRT>
				<Port>60999</Port>
				<WorkerCount>1</WorkerCount>
			</SRT>
		</Providers>
		<Publishers>
			<LLHLS>
				<Port>60080</Port>
				<TLSPort>60443</TLSPort>
				<WorkerCount>1</WorkerCount>
			</LLHLS>
		</Publishers>
	</Bind>
	<Managers>
		<Host>
			<Names>
				<Name>localhost:60080</Name>
			</Names>
			<TLS>
				<CertPath>cert.pem</CertPath>
				<KeyPath>key.pem</KeyPath>
				<ChainCertPath>cert.pem</ChainCertPath>
			</TLS>
		</Host>
		<API>
			<AccessToken>xxx</AccessToken>
			<CrossDomains><Url>*</Url></CrossDomains>
		</API>
	</Managers>
	<VirtualHosts>
		<VirtualHost>
			<Name>default</Name>
			<Distribution>xxx</Distribution>
			<Host>
				<Names><Name>*</Name></Names>
				<TLS>
					<CertPath>cert.pem</CertPath>
					<KeyPath>key.pem</KeyPath>
					<ChainCertPath>cert.pem</ChainCertPath>
				</TLS>
			</Host>
			<Applications>
				<Application>
					<Name>live</Name>
					<Type>live</Type>
					<Providers><RTMP/><SRT/></Providers>
					<Publishers><RTMPPush></RTMPPush><LLHLS><CrossDomains><Url>*</Url></CrossDomains></LLHLS></Publishers>
					<TranscodeWebhook>
						<Enable>true</Enable>
						<ControlServerUrl>http://localhost:9999/webhook/25</ControlServerUrl>
						<SecretKey>xxx</SecretKey>
						<Timeout>3000</Timeout>
						<UseLocalProfilesOnConnectionFailure>true</UseLocalProfilesOnConnectionFailure>
						<UseLocalProfilesOnServerDisallow>true</UseLocalProfilesOnServerDisallow>
						<UseLocalProfilesOnErrorResponse>true</UseLocalProfilesOnErrorResponse>
					</TranscodeWebhook>
					<OutputProfiles>
						<OutputProfile>
							<Name>bypass_stream</Name>
							<OutputStreamName>${OriginStreamName}</OutputStreamName>
							<Encodes>
							<Audio>
							<Name>bypass_audio</Name>
							<Bypass>true</Bypass>
							</Audio>
							<Video>
							<Name>bypass_video</Name>
							<Bypass>true</Bypass>
							</Video>
							</Encodes>
						</OutputProfile>
					</OutputProfiles>
				</Application>
			</Applications>
			<AdmissionWebhooks>
				<ControlServerUrl>http://localhost:9999/webhook/25</ControlServerUrl>
				<SecretKey>xxx</SecretKey>
				<Timeout>3000</Timeout>
				<Enables>
					<Providers>rtmp,srt</Providers>
					<Publishers></Publishers>
				</Enables>
			</AdmissionWebhooks>
			<CrossDomains>
				<Url>*</Url>
			</CrossDomains>
		</VirtualHost>
	</VirtualHosts>
</Server>