# NVidia CUDA hardware acceleration is NOT available **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [October 11, 2012, 12:28pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389 "2012-10-11T12:28:34Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![uygar\_ozen](https://avatars.discourse-cdn.com/v4/letter/u/ccd318/32.png) [@uygar\_ozen](https://community.wowza.com/u/uygar_ozen)\ **Post date:** [October 11, 2012, 12:28pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/1 "2012-10-11T12:28:34Z")
I am evaluating wowza with developer license. I can watch the transcoded multiple streams , but CUDA is not utilized. Please help. Uygar log: 2012-10-11 10:38:28 EEST comment server INFO 200 - Server License Key: SVRB3-XXXXX-XXXXX-XXXXX-XXXXX-VUTJH - - - 2.325 - - - - - - - - - - - - - - - - - - - - - - - - - 2012-10-11 10:38:28 EEST comment server INFO 200 - Maximum Connections: 10 - - - 2.325 - - - - - - - - - - - - - - - - - - - - - - - - - 2012-10-11 10:38:28 EEST comment server INFO 200 - Transcoder Streams Available: 1 - - - 2.325 - - - - - - - - - - - - - - - - - - - - - - - - - 2012-10-11 10:38:28 EEST comment server INFO 200 - Transcoder Watermark: Yes - - - 2.325 - - - - - - - - - - - - - - - - - - - - - - - - - 2012-10-11 10:39:39 EEST comment server INFO 200 - LiveStreamTranscoder.init[live/_definst_/dr]: Load transcoder template: file:///C:/Program Files (x86)/Wowza Media Systems/Wowza Media Server 3.1.2/transcoder/templates/transrate.xml - - - 72.976 - - - - - - - - - - - - - - - - - - - - - - - - - 2012-10-11 10:39:39 EEST comment server INFO 200 - JNI:TranscoderSession.isCUDAAvailable[_defaultVHost_:live/_definst_/dr]: NVidia CUDA hardware acceleration is NOT available - - - 73.476 - - - - - - - - - - - - - - - - - - - - - - - - - GPU is Nvidia GeForce GTX 590 with driver version (latest) 9.18.13.697 ---
**Author:** ![uygar\_ozen](https://avatars.discourse-cdn.com/v4/letter/u/ccd318/32.png) [@uygar\_ozen](https://community.wowza.com/u/uygar_ozen)\ **Post date:** [October 11, 2012, 12:31pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/2 "2012-10-11T12:31:24Z")
I added “CUDA” on each line in transcode.xml file and added relevant lines in application.xml: live transcoder ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [October 12, 2012, 4:48pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/3 "2012-10-12T16:48:57Z")
It could be that this machine has virtu or similar technology such as Optimus that control access to the graphics card because there are multiple graphics system such as Intel HD3000/4000 on Sandy Bridge or Ivy Bridge machine. So the system is defaulting to the build-in card. Do you see indication of Quick Sync in the start up lines of the Wowza access log? Can you provide more details about this system, the motherboard model? Richard ---
**Author:** ![Ivan\_Ivanovich](https://avatars.discourse-cdn.com/v4/letter/i/8e8cbc/32.png) [@Ivan\_Ivanovich](https://community.wowza.com/u/Ivan_Ivanovich)\ **Post date:** [March 7, 2013, 10:27pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/4 "2013-03-07T22:27:06Z")
Hello, I am experiencing the same issue on CentOS. I have GeForce GTX 670 with latest driver ( Driver Version: 310.32) and I have enabled CUDA in transcoder.xml (CUDA). But I see in log "JNI:TranscoderSession.isCUDAAvailable[_defaultVHost_:live/_definst_/camera]: NVidia CUDA hardware acceleration is NOT available on Linux " Can you please explain how to fix this issue? Thank you ---
**Author:** ![Chanchai\_Srithep](https://avatars.discourse-cdn.com/v4/letter/c/bc8723/32.png) [@Chanchai\_Srithep](https://community.wowza.com/u/Chanchai_Srithep)\ **Post date:** [November 17, 2013, 4:19am UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/5 "2013-11-17T04:19:17Z")
i use Geforce GTX 760 Windows 7 64bit JAVA 1.7.0 updata 45 notworking how to fix ? ---
**Author:** ![uygar\_ozen](https://avatars.discourse-cdn.com/v4/letter/u/ccd318/32.png) [@uygar\_ozen](https://community.wowza.com/u/uygar_ozen)\ **Post date:** [October 15, 2012, 12:52pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/6 "2012-10-15T12:52:56Z")
I updated the ticket (#39585) Uygar ---
**Author:** ![uygar\_ozen](https://avatars.discourse-cdn.com/v4/letter/u/ccd318/32.png) [@uygar\_ozen](https://community.wowza.com/u/uygar_ozen)\ **Post date:** [October 19, 2012, 3:53pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/7 "2012-10-19T15:53:36Z")
problem was about CUDA drivers, Wowza works fine with CUDA. Uygar ---
**Author:** ![Roger\_Littin1](https://avatars.discourse-cdn.com/v4/letter/r/c89c15/32.png) [@Roger\_Littin1](https://community.wowza.com/u/Roger_Littin1)\ **Post date:** [March 9, 2013, 5:52pm UTC](https://community.wowza.com/t/nvidia-cuda-hardware-acceleration-is-not-available/39389/8 "2013-03-09T17:52:54Z")
Hi, CUDA is not currently supported on the Linux Wowza transcoder. Only the default and QuickSync encoders are supported. Roger.