Get video resolution (height & width) in the onPublish event

Wowza Developer Dojo
1

Hi

I’d like to send the video resolution to my webserver in the onpublish event. I already overwritten the method to send some other stuff (like clientId) everything works fine. But I really don’t find a solution with the resolution.

Anyone with the same issue or an idea?

Thank you very much

2

Take a look at IMediaStreamActionNotify3.onMetaData() and IMediaStreamActionNotify3.onCodecInfoVideo()

https://www.wowza.com/docs/how-to-use-imediastreamactionnotify3-interface-to-listen-for-rtmp-stream-events-includes-codec-info

Richard

3

You should be able to get frame size from IMediaStreamActionNotify3.onMetaData()

You can get a rolling average bit rate of a 5 second window of a live stream with IOPerformanceCounter.getMessagesOutBytesRate()

To do that you have to attach the counter and monitor using a timer. Take a look at this example:

https://www.wowza.com/docs/how-to-monitor-bandwidth-of-published-streams-modulelimitpublishedstreambandwidth

Richard

4

I don’t think there is equivalent for rtsp. There is the IMediaCasterNotify inteface, but it does not include similar codec methods.

https://www.wowza.com/docs/imediacasternotify2-example

Richard

5

Apparently it is not in the stream.

Richard

6

Richard, is it possible to also get the bit rates and frame sizes? Just being able to get the codec data that I can get through that example is a huge help, but being able to get the additional information would be a big help in the future.

I see lines in the debug log like:

INFO server comment - LiveStreamPacketizerCupertino.handlePacket[live/definst/test][avc1.66.30]: H.264 Video info: {H264CodecConfigInfo: codec:H264, profile:Bsaeline, level:3.0, frameSize:656x448, displaYSize:656x448, frameRate:30.0, PAR:1:1}

and

INFO server comment - LiveStreamPacketizerCupertino.handlePacket[live/definst/test][mp4a.40.2]: AAC Audio info: {AACFrame: codec:AAC, channels:2, frequency:48000, samplesPerFrame:1024, objectType:LC}

I know that if I really want the info I can always write a custom log appender for log4j and grab the info out of the logs but that’s a really tacky way to go about it. Is there any way that I could pull that out using the API?

7

How would I do the same thing for RTSP streams?

8

You should be able to get frame size from IMediaStreamActionNotify3.onMetaData()

You can get a rolling average bit rate of a 5 second window of a live stream with IOPerformanceCounter.getMessagesOutBytesRate()

To do that you have to attach the counter and monitor using a timer. Take a look at this example:

Monitor bandwidth of published streams

Richard

I might be missing something, but I’m not seeing the frame size info there. The javadocs don’t seem to be helping either.

When I call the toString method of the AMFData argument I get back:

{AMFPacket: size: 514, type: 18, src: 0, seq: 0, absTimecode: 0, timecode: 0}

What am I missing?

9

catdude,

Some other info here, such getMessagesOutBytes() or iLogNotify. cs-bytes.

That looks like it could be exactly what I’m looking for! Thanks.

I assume that this does not require a patch with Wowza 3, is that correct?

The example shown is missing a couple lines; I believe you need to add “import com.wowza.wms.stream.IMediaStream;” since the third argument to onLog is of that type. I think it also needs “import org.apache.log4j.Level;” since the second argument’s type is defined there. But I’m now getting the info I need and sticking it into my database, so thanks again for the pointer. I’ve gone through the server-side API docs a bunch of times, but somehow managed to miss the info for the logging classes.

10

catdude,

Some other info here, such getMessagesOutBytes() or iLogNotify. cs-bytes.

11

Hi Daniel,

I am having the same issue. I am only getting this {AMFPacket: size: 514, type: 18, src: 0, seq: 0, absTimecode: 0, timecode: 0}. Can you please show your sample code?

Thanks in advance.