Debug encoder multi-bitrate keyframe alignment with Wowza Streaming Engine

This article describes how to use the debugKeyFrameTimecodes and maxChunkLogCount properties to debug encoder multi-bitrate keyframe alignment. It also explains how to configure the chunkBreakOnPTS property to make sure Wowza Streaming Engine™ media server software is using the right timestamp to align the keyframes.

1. In Wowza Streaming Engine Manager, click the Applications tab and select your application in the contents panel.
    
2. In the details page, click the Properties tab, and then click Custom in the Quick Links bar.
3. In the Custom section, click Edit.
4. Click Add Custom Property, specify the following settings in the Add Custom Property dialog box, and then click Add:

   Path	Name	Type	Value
   /Root/Application/Streams	debugKeyFrameTimecodes	Boolean	Set the value to true to enable Wowza Streaming Engine to log presentation timestamp (PTS) and decoder timestampe (DTS) information for each video keyframe.
   /Root/Application/LiveStreamPacketizer	maxChunkLogCount	Integer	For non-CMAF streams, set the value to 0 to enable Wowza Streaming Engine to log information about all HTTP chunks.
   /Root/Application/LiveStreamPacketizer	chunkBreakOnPTS	Boolean	(Optional) Wowza Streaming Engine assumes streams are aligned on PTS timestamps. For non-CMAF streams, if your stream is aligned on DTS timestamps, set the value to false.
   /Root/Application/LiveStreamPacketizer	maxSegmentLogCount	Integer	(Wowza Streaming Engine 4.7.8 or later) For CMAF-packetized streams only, set the value to 0 to enable Wowza Streaming Engine to log information about all HTTP chunks.
   /Root/Application/LiveStreamPacketizer	cmafSegmentBreakOnPTS	Boolean	(Optional; Wowza Streaming Engine 4.7.8 or later) Wowza Streaming Engine assumes streams are aligned on PTS timestamps. For CMAF-packetized streams only, if your stream is aligned on DTS timestamps, set the value to false.

5. Click Save, and then restart the application when prompted to apply the changes.