NVIDIA GPUs contain a hardware-based decoder (a chip referred to as NVDEC) which provides fully-accelerated hardware-based video decoding for several popular codecs. With complete decoding offloaded to NVDEC, the graphics card and the CPU are free for other operations and you can increase the number of video cameras displayed on the Client.

In addition, if you have the NVDEC dedicated hardware video decoder running on Servers, you can get video streaming directly to GPU (see Detection tools implementation on processors) for analysis and detection purposes, bypassing RAM.

In Axxon Next VMS, the NVDEC chips are used to decode:

  1.  video compressed with the following codecs: H.264, Н.265 and MPEG-2.
  2. In Live Video, Archive Video, and TimeCompressor.


Before you start, please make sure to install the latest driver for your NVIDIA GPU.


Please see the list of supported devices for the  NVDEC chips  on the NVIDIA official website.

When decoding with NVDEC, the following limitations apply:

  1. Maximum video resolution for H.264 - 4096x4096.
  2. Maximum video resolution for H.265 - 8192x8192.
  3. The maximum total frame rate per second for the H.264 codec is 648 fps.

To enable decoding with NVDEC, do as follows:

  1. Go to Settings → Options → User interface (1–2). 

  2. Select the Enable Hardware Decoding checkbox (3).
  3. Click Apply.