In laptop graphics, NVIDIA MX Graphics do not include NVENC as they are based on a Maxwell-generation GM108 or a Pascal-generation GP108 chip. The NVIDIA GT 1030 and the Mobile Quadro P500 are GP108 chips that don't support the NVENC encoder. There is no B-Frame support for HEVC encoding, and the maximum CU size is 32×32.
Weighted prediction is not supported if the encode session is configured with B frames (H.264). Nvidia Video Codec SDK 8 added Pascal exclusive Weighted Prediction feature (CUDA based). It supports HEVC 8K, 4:4:4 chroma subsampling, lossless encoding, and sample adaptive offset (SAO). It also doubles the encoding performance of 4K H.264 & HEVC when compared to previous generation NVENC. Its higher-end Quadro cards do not have this restriction.įourth generation NVENC implements HEVC Main10 10-bit hardware encoding.
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Nvidia's consumer-grade (GeForce) cards and some of its lower-end professional Quadro cards are restricted to three simultaneous encoding jobs. SDK 7 supports two forms of adaptive quantization Spatial AQ (H.264 and HEVC) and Temporal AQ (H.264 only). These features rely on CUDA cores for hardware acceleration. Adaptive quantization, look-ahead rate control, adaptive B-frames (H.264 only) and adaptive GOP features were added with the release of Nvidia Video Codec SDK 7. HEVC encoding also lacks Sample Adaptive Offset (SAO). The maximum NVENC HEVC coding tree unit (CU) size is 32 (the HEVC standard allows a maximum of 64), and its minimum CU size is 8.
However, it does not support B-frames for HEVC encoding (just I and P frames). HEVC, H.265) and also increases the H.264 encoder's throughput to cover 4K-resolution at 60 Hz (2160p60). Introduced with the second-generation Maxwell architecture, third generation NVENC implements the video compression algorithm High Efficiency Video Coding (a.k.a. Maxwell GM108 does not have NVENC hardware encoder support.
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Introduced with the first-generation Maxwell architecture, second generation NVENC adds support for the high-performance HP444 profile (YUV4:4:4, predictive lossless encoding), and increases encoder throughput up to 16× realtime, which corresponds to about 1080p 480 Hz with the high-performance preset.) The high-quality preset is considerably slower but produces fewer compression artifacts. The published 8× rating is achievable with the NVENC high-performance preset, which sacrifices compression efficiency and quality for encoder throughput. Actual throughput varies on the selected preset, user-controlled parameters and settings, and the GPU/memory clock frequencies. NVidia's documentation states a peak encoder throughput of 8× realtime at a resolution of 1920×1080 (where the baseline "1×" equals 30 Hz). The first generation of NVENC, which is shared by all Kepler-based GPUs, supports H.264 high-profile (YUV420, I/P/B frames, CAVLC/CABAC), H.264 SVC Temporal Encode VCE, and Display Encode Mode (DEM). (In H.264, NVENC always has B Frame support, max 4096x4096 resolution, and max 8-bit depth)
NVENC has undergone several hardware revisions since its introduction with the first Kepler GPU (GK104).
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