# Wowza 4.7, NVIDIA NVENC and CUDA problems with only 1 transcoded stream

**URL:** <https://community.wowza.com/t/wowza-4-7-nvidia-nvenc-and-cuda-problems-with-only-1-transcoded-stream/49193>\
**Category:** Wowza Streaming Engine\
**Tags:** transcoder\
**Created:** [July 14, 2017, 7:44pm UTC](https://community.wowza.com/t/wowza-4-7-nvidia-nvenc-and-cuda-problems-with-only-1-transcoded-stream/49193 "2017-07-14T19:44:36Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![edaich](https://avatars.discourse-cdn.com/v4/letter/e/f475e1/32.png) [@edaich](https://community.wowza.com/u/edaich)\
**Post date:** [July 14, 2017, 7:44pm UTC](https://community.wowza.com/t/wowza-4-7-nvidia-nvenc-and-cuda-problems-with-only-1-transcoded-stream/49193/1 "2017-07-14T19:44:36Z")

</div>

I have NVIDIA K80 card running on Azure N-Series machine, Wowza configured to encode using NVENC and decode using NVCUVID. With only 1 stream, I’m seeing these logs indicating problems:

```auto
TranscodingSession.updateBehindFilter[phlive/_definst_/tester]: Video behind filter state change. New state: ALLFRAMESOFF

TranscodingSession.updateBehindFilter[phlive/_definst_/tester]: Video behind filter state change. New state: KEYFRAMESONLY

```

Please tell me what is wrong.

Confirmed the GPU is available:

```auto
JNI:TranscoderSession.isCUDAAvailable[_defaultVHost_:phlive/_definst_/tester]:NVidia hardware acceleration is available: NVENC5[H264], NVCUVID, CUDA[decode]---597.896-------------------2

017-07-1419:41:06UTCcommentserverINFO200-JNI:NVidiaCUDAUtils.logCUDAGPUInfo[_defaultVHost_:phlive/_definst_/tester]: GPU[0]: name:"Tesla K80" computeCapability:3.7 cudaVersion:8000 driverVersion:367.92 memory:11439MB processors:13 cores:2496 clockRate:823MHz

JNI:TranscoderSession.videoDecoderCreate[_defaultVHost_:phlive/_definst_/tester]: Create video decoder: H.264: NVCUVID

```

---

<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:** [July 31, 2017, 3:32am UTC](https://community.wowza.com/t/wowza-4-7-nvidia-nvenc-and-cuda-problems-with-only-1-transcoded-stream/49193/2 "2017-07-31T03:32:40Z")

</div>

Hello @edaich,

Make sure you have the latest drivers Tesla drivers installed on the Azure instance.  
I believe the latest drivers as of today is version 385.08.

If updating the drivers fail, our support staff would need to take a further look at the configuration and logs data set from your server in order to identify the issue. Please open a [new ticket here](https://www.wowza.com/support/open-ticket).

Regards,

Alex C.