--- Type: article State: [ obsolete ] Title: Nvidia NVEnc Encoder Project: HandBrake Project_URL: https://handbrake.fr/ Project_Version: 1.2.0 Language: English Language_Code: en Authors: [ Scott (s55) ] Copyright: 2022 HandBrake Team License: Creative Commons Attribution-ShareAlike 4.0 International License_Abbr: CC BY-SA 4.0 License_URL: https://handbrake.fr/docs/license.html --- Nvidia NVEnc Encoder ========================== Supported Hardware and Configurations -------------- - Nvidia GeForce GTX 10 and RTX 20 Series graphics cards are supported. - Driver "399.24" or later must be installed. - Windows 7 SP1 and Later. (Linux *may* work but via the command line interface only) Please note, these are not hard limits and the feature *may* work on older series and operating systems, but this is not officially supported. Enabling support -------------- Support for the NVEnc encoder can be enabled in preferences under the video tab. If your system is not supported, the option will be greyed out. Performance -------------- Take note that only the encode portion of the encode pipeline is done on the Nvidia ASIC hardware. Every stage prior and after in the pipeline including (decoding, filters, a/v sync, muxing etc.) all happen on the CPU. As a result, it is normal to have high, or 100% CPU utilisation during encodes. It is common, particularly on lower end hardware that the CPU may be a bottleneck for the Nvidia encoder. To minimise this effect, turn off any filters that you do not require. Using the Advanced Options -------------- NvEnc does have a limited set of advanced encoder options that can be used. Generally speaking is is not recommended to change these parameters. The built-in presets offer a good range of options. From the command line, you can use the --encopts parameter as follows: --encopts="option1=value1:option2=value2" From the graphical user interface, just set the options in the dedicated options text box on the Video tab. option1=value1:option2=value2 Option Types -------------- The following value types are supported (each option only accepts one value type): - integer A number that can be written without a fractional or decimal component. - boolean 0 means off (or disabled). 1 means on (or enabled). - string Takes a setting defined as s string. See comment for details. Available Options -------------- | Option | Type | H.264 | H.265 | Comment | |------------------|-------------|------------------------------------------------------------------------------------------------| | coder | string | X | | Options: auto, cabac, cavlc | | temporal-aq | boolean | X | X | | | spatial-aq | boolean | X | X | For H.265, use "spatial_aq" for H.265 encodes. Note the underscore | | aq-strength | int | X | X | When Spatial AQ is enabled, the scale is from 1 (low) - 15 (aggressive) | | nonref_p | boolean | X | X | Enable automatic insertion of non-reference P-frames | | strict_gop | boolean | X | X | Minimise GOP to GOP rate fluctuations | | weighted_pred | boolean | X | X | | | rc-lookahead | int | X | X | 0 to 27 | | b_adapt | boolean | X | | Set this to 0 to disable adaptive B-frame decision when lookahead is enabled | | no-scenecut | boolean | X | X | 1 = Disable adaptive I-frame insertion at scene cuts when using lookahead |