Teradek Prism to Wowza – Audio but no video

[Bryce_Seifert]

We recently acquired the Teradek Prism encoder, and when streaming to Wowza we get audio but no video.

When streaming to the same Wowza instance with a Teradek Cube, we get video + audio as expected.

We’ve tried this on 4.8.13 and 4.8.20, with the same result.

Some of the errors we’re seeing are

2022-09-26      11:21:54        CDT     comment server  WARN    200     - 
TranscoderWorkerVideoDecoder.frameDimensionsValid[_defaultVHost_:remote/_definst_/stream6: decodeIterations:0]: 
videoDecoderDecodeDisplayWidth failed [0:32:8192]: Encodes will not be playable -       -       -       1.0086778356E7

and

 ERROR   server  comment 2022-09-26      15:25:10        -       -       -       -       -       1.0101373719E7  - 
> -       -       -       -       -       -       -       H264Utils.decodeAVCC : java.lang.Exception: Expected to parse 
> SPS of length 42 bytes, but 8 bits remained|at com.wowza.wms.media.h264.H264Utils.decodeAVCC(H264Utils.java:463)|at 
> com.wowza.wms.media.h264.H264Utils.decodeAVCC(H264Utils.java:398)|at 
> com.wowza.wms.media.h264.H264Utils.decodeAVCC(H264Utils.java:99)|at 
>

[Rose_Power-Wowza_Com]

@Bryce_Seifert

Teradek Prism

Hmmm… that’s interesting since we do support the Teradek Prism. Can you tell me the following:

1. What is the protocol you are using? RTMP? SRT? MPEG?
2. Are you sending a 4K stream?
3. What version of Java are you using?

I will look for your reply.

[Rose_Power-Wowza_Com]

Something within the source settings Wowza is not liking. e.g. H.264 profile range compared to frame size and resolution. Please open a support ticket with a screenshot of the Teradek settings (resolution, H.264 profile, video/audio bitrates), stream name in question, if you are transcoding, WSE conf/logs/transcode template/ for support to review).

[Bryce_Seifert]

@Rose_Power-Wowza_Com

• What is the protocol you are using? RTMP? SRT? MPEG?
• Are you sending a 4K stream?
• What version of Java are you using?

• RTMP
• Not 4K. I’ve tried 720 + 1080
• Java Version 9.0.4 Java VM Version 9.0.4+11

[Bryce_Seifert]

These are the full Teradek specs.

[Bryce_Seifert]

And I have submitted a ticket.

[PWI_Team]

Hi,
try to add the below property in Application.xml, Streams/Properties section:

<Property>
				<Name>fixH264InjectCodecConfig</Name>
				<Value>true</Value>
				<Type>Boolean</Type>
</Property>

[Rose_Power-Wowza_Com]

i think this is the problem, but I see you have a ticket in and it will get assigned today: You need to have a minimum of Java 11 for Engine 4.8.20. I know you mentioned issues in a different version though so tech support will troubleshoot this accurately.

Java support: Wowza Streaming Engine 4.8.20 is built on Java 11 ( OpenJDK Java SE JRE 11.0.2 ), but can be used with Java versions 11 - 12. For more information, see Manually install and troubleshoot Java on Wowza Streaming Engine.

[Rose_Power-Wowza_Com]

@Bryce_Seifert

java.lang.Exception: Expected to parse

Unfortunately, this error can be thrown for more than one reason which makes it difficult to diagnose in the forums.

[Rose_Power-Wowza_Com]

If updating your Java doesn’t work Bryce, I see that tech support has sent you some troubleshooting tips in your ticket to see if it’s a problem with your encoder itself connecting to Wowza although we do support that model.

[Bryce_Seifert]

After talking to Teradek and rolling back the firmware a few versions, this seems to be resolved.

So I believe they’re working on a fix, although still not sure what the root cause of the issue is.

[Rose_Power-Wowza_Com]

I saw that in the ticket, so glad you brought this to our attention and hope it gets resolved to go back to the newer version of the firmware.