NVDEC
Nvidia's hardware video decoding offload engine for GPUs.
NVDEC, originally called NVCUVID, is a hardware feature on Nvidia graphics cards that handles video decoding, shifting this demanding work away from the CPU. It replaces the earlier PureVideo technology and is found in Kepler-generation and newer Nvidia GPUs. For encoding, it is paired with NVENC as part of Nvidia's Video Codec SDK. The technology can use dedicated fixed-function decoding hardware (Nvidia PureVideo) for full offloading, or, when that hardware is unavailable, it can rely on CUDA software running on the GPU for partial decoding. Supported codecs vary by GPU architecture and include MPEG-2, VC-1, H.264 (AVC), H.265 (HEVC), VP8, VP9, and AV1. NVCUVID was initially included in the Nvidia CUDA Toolkit before being renamed NVDEC and moved to the Nvidia Video Codec SDK. The API is available on Windows and Linux, but because it is proprietary (unlike the open-source VDPAU API), Linux support requires the proprietary Nvidia driver. In terms of software support, GStreamer, FFmpeg, and mpv (via FFmpeg) have all supported NVDEC since 2017. Hardware-accelerated decode and encode are available on Nvidia GeForce, Quadro, Tesla, and GRID products with Fermi or newer GPU generations.
- Available in gpus since
- Fermi
Lore & Background
NVDEC originated as NVCUVID, distributed as part of the Nvidia CUDA Toolkit. It was later renamed to NVDEC and moved to the Nvidia Video Codec SDK. The technology can offload video decoding to full fixed-function decoding hardware (Nvidia PureVideo) or partially decode via CUDA software running on the GPU if fixed-function hardware is not available. Depending on the GPU architecture, NVDEC supports codecs including MPEG-2, VC-1, H.264 (AVC), H.265 (HEVC), VP8, VP9, and AV1. NVDEC is available for Windows and Linux operating systems; on Linux, it is only supported by the proprietary Nvidia driver, as it is a proprietary API unlike the open-source VDPAU API. Hardware accelerated decode and encode are supported on Nvidia GeForce, Quadro, Tesla, and GRID products with Fermi or newer generation GPUs.
Reader's Guide
NVDEC's significance lies in its role as Nvidia's dedicated video decoding solution, offloading CPU-intensive decoding tasks to the GPU. As a successor to PureVideo, it has been available since the Kepler GPU architecture and continues across later generations. Its support for a wide range of codecs—from legacy MPEG-2 to modern AV1—makes it relevant for both playback and transcoding workflows. The transition from NVCUVID to NVDEC and its integration into the Video Codec SDK reflects Nvidia's consolidation of video acceleration APIs. Application support from Gstreamer, FFmpeg, and mpv (via FFmpeg) since 2017 has enabled broad software compatibility. On Linux, the proprietary driver requirement distinguishes it from open-source alternatives like VDPAU. NVDEC's pairing with NVENC for encoding completes Nvidia's hardware video acceleration ecosystem, used across GeForce, Quadro, Tesla, and GRID product lines.
Did You Know?
- NVDEC was originally called NVCUVID and was part of the Nvidia CUDA Toolkit.
- NVDEC can decode video using fixed-function hardware or partially via CUDA software.
- NVDEC supports AV1 decoding in addition to older codecs like MPEG-2 and VC-1.
- On Linux, NVDEC requires the proprietary Nvidia driver and is not available via the open-source VDPAU API.
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