# Please check the Wowza error log

**URL:** <https://community.wowza.com/t/please-check-the-wowza-error-log/96355>\
**Category:** Wowza Streaming Engine\
**Created:** [August 2, 2023, 12:41am UTC](https://community.wowza.com/t/please-check-the-wowza-error-log/96355 "2023-08-02T00:41:45Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![changil\_shin](https://avatars.discourse-cdn.com/v4/letter/c/58f4c7/32.png) [@changil\_shin](https://community.wowza.com/u/changil_shin)\
**Post date:** [August 2, 2023, 12:41am UTC](https://community.wowza.com/t/please-check-the-wowza-error-log/96355/1 "2023-08-02T00:41:45Z")

</div>

Hello,  
Wowza version is 4.8.13+1.  
In the log, the log with the following content continues to occur.  
For what reason is this happening? How should I respond?  
thank you.

java.lang.Exception: Expected to parse SPS of length 48 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 com.wowza.wms.httpstreamer.mpegdashstreaming.util.MPEGDashUtils.parseNalUnitLengthForCodec(MPEGDashUtils.java:902)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.createFragmentM4S(MPEGDashWriterHandler.java:848)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.endSegment(MPEGDashWriterHandler.java:662)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.endSegment(LiveStreamPacketizerPacketHandler.java:1406)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handleHolderInternal(LiveStreamPacketizerPacketHandler.java:942)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handleHolder(LiveStreamPacketizerPacketHandler.java:780)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacket(LiveStreamPacketizerPacketHandler.java:712)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacketSorted(LiveStreamPacketizerPacketHandler.java:212)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacket(LiveStreamPacketizerPacketHandler.java:204)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.handlePacket(MPEGDashWriterHandler.java:279)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.LiveStreamPacketizerMPEGDash.internalHandlePacket(LiveStreamPacketizerMPEGDash.java:270)|  
ERROR server comment 2023-07-30 00:00:05 - - - - - 1483144.948 - - - - - - - - H264Utils.decodeAVCC : java.lang.Exception: Expected to parse SPS of length 48 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 com.wowza.wms.httpstreamer.mpegdashstreaming.util.MPEGDashUtils.parseH264CodecConfig(MPEGDashUtils.java:842)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.createFragmentM4S(MPEGDashWriterHandler.java:1081)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.endSegment(MPEGDashWriterHandler.java:662)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.endSegment(LiveStreamPacketizerPacketHandler.java:1406)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handleHolderInternal(LiveStreamPacketizerPacketHandler.java:942)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handleHolder(LiveStreamPacketizerPacketHandler.java:780)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacket(LiveStreamPacketizerPacketHandler.java:712)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacketSorted(LiveStreamPacketizerPacketHandler.java:212)|at com.wowza.wms.httpstreamer.model.LiveStreamPacketizerPacketHandler.handlePacket(LiveStreamPacketizerPacketHandler.java:204)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.MPEGDashWriterHandler.handlePacket(MPEGDashWriterHandler.java:279)|at com.wowza.wms.httpstreamer.mpegdashstreaming.livestreampacketizer.LiveStreamPacketizerMPEGDash.internalHandlePacket(LiveStreamPacketizerMPEGDash.java:270)|

---

<div class="post-metadata">

**Author:** ![Alex\_C](https://avatars.discourse-cdn.com/v4/letter/a/bbe5ce/32.png) [@Alex\_C](https://community.wowza.com/u/Alex_C)\
**Post date:** [August 2, 2023, 12:34pm UTC](https://community.wowza.com/t/please-check-the-wowza-error-log/96355/2 "2023-08-02T12:34:11Z")

</div>

Hello @changil_shin,

This issue was resolved with an update to Wowza Streaming Engine:  
[https://www.wowza.com/docs/known-issues-with-wowza-streaming-engine](https://www.wowza.com/docs/known-issues-with-wowza-streaming-engine)

#### Resolved: Decoding fails for some H.264 live and VOD sources

With Wowza Streaming Engine 4.8.13 and later, some live and VOD sources with H.264 video fail upon publishing or playback due to a decoding error. The error is logged with a message similar to the following:

`ERROR 500 - H264Utils.decodeAVCC : java.lang.Exception: Expected to parse SPS of length 28 bytes, but 16 bits remained`

#### Solution

Update to the latest version of Wowza Streaming Engine. This problem is fixed in Wowza Streaming Engine 4.8.15 and later.

Regards,  
Alex