Simplified rate control modes-Choose VBR/CBR/constant-QP encoding and set the desired bitrate and mode (1-pass or 2-pass).This determines the set of tools used for the encoding: for example, GOP structure, B frames, look-ahead encoding, and so on. Predefined presets- Choose from a set of seven predefined presets, from P1 (fastest, lowest quality) to P7 (slowest, highest quality).Tuning information-Specify the use scenario:.The following major changes have been introduced for improved flexibility: The preset designs in Video Codec SDK 10 are built for better control and granularity over performance compared to the quality tradeoff for NVENC. To address these issues and give you better control, new presets are being introduced in Video Codec SDK 10. Up to a 5% bitrate savings is achievable on some clips. Quality compared to performance-The HQ preset doesn’t always provide the best quality with lower performance.

Non-uniform preset behavior for different resolutions-For example, a frames per second rate (FPS) improvement of 60% is achievable on Turing by just 2% BD-BR degradation from the Low Latency High Performance preset.A large number of presets -There are currently nine presets, but they often have an inadequate quality or performance tradeoff.Because NVENCODE API guarantees binary backward compatibility, it has been difficult to reorganize the presets. These presets evolved over the years, with multiple hardware generations and encoder features getting introduced in each generation. LOW_LATENCY_HQ (Low latency high quality).LOW_LATENCY_HP (Low latency high performance).The presets exposed in the NVENCODE API currently are as follows:

The NVIDIA NVENC presets design in Video Codec SDK 9.1 and earlier evolved based on various NVENC use cases, which have emerged over time. All NVIDIA GPUs starting with the Kepler generation support fully accelerated hardware video encoding, and all GPUs starting with the Fermi generation support fully accelerated hardware video decoding through the NVIDIA Video Codec SDK.

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