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docs: New page covering QuickSync advanced options
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*Make sure your system can run HandBrake*
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- [Supported Source formats](technical/source-formats.html)
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- Video
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- [x264 presets, tunes, and custom settings](technical/video-x264-presets-tunes.html)
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- [x264 presets and tunes](technical/video-x264-presets-tunes.html)
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- [x264 profile and level](technical/video-x264-profiles-levels.html)
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- [Intel QuickSync Options](technical/video-qsv-options.html)
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<!--
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- Advanced Filter Settings
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- Advanced preferences
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---
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Type: article
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State: draft
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Title: Intel QuickSync Encoder Options
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Project: HandBrake
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Project_URL: https://handbrake.fr/
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Project_Version: Latest
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Language: English
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Language_Code: en
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Authors: Scott (s55)
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Copyright: 2016 HandBrake Team
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License: Creative Commons Attribution-ShareAlike 4.0 International
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License_Abbr: CC BY-SA 4.0
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License_URL: https://handbrake.fr/docs/license.html
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---
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Intel Quick Sync Video Advanced Configuration
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==========================
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Using the Advanced Options
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--------------
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From the command line, you can use the --encopts paramater as follows:
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--encopts="option1=value1:option2=value2"
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From the graphical user interface, just set the options in the dedicated text box:
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option1=value1:option2=value2
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Option Types
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--------------
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The following value types are supported (each option only accepts one value type):
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- integer
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A number that can be written without a fractional or decimal component.
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- float
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The finite decimal representation of a real number.
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- boolean
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0 means off (or disabled).
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1 means on (or enabled).
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Available Options
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--------------
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- target-usage (or tu) <integer>
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Sets the trade-off between quality and speed, from 1 (best quality) to 7 (best speed).
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Default: 2
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- num-ref-frame (or ref) <integer>
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Number of reference frames, from 1 to 16.
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0 means unspecified (set at runtime by the implementation).
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Default: 0 (unspecified)
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- gop-ref-dist <integer>
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Distance between I or P reference frames, from 1 to 16.
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-1 means automatic (4 in constant QP mode, 3 otherwise).
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0 means unspecified (set at runtime by the implementation).
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1 means B-frames will not be used.
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Default: -1 (automatic)
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Note: may be sanitized to a lower value in some cases to avoid hangs.
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- gop-pic-size (or keyint) <integer>
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Number of pictures within the current GOP (aka "keyframe interval").
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-1 means automatic (32 in constant QP mode, 1 second long otherwise).
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0 means unspecified (set at runtime by the implementation).
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1 means only I-frames will be used.
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2 means B-frames will not be used.
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Default: -1 (automatic)
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- cavlc <boolean>
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Use CAVLC instead of CABAC entropy coding. Reduces compression efficiency.
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It may improve encoding performance slightly, especially on older hardware.
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Note: you can also use ''cabac'' (same as ''cavlc'' with reversed meaning).
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Default: 0 (CAVLC off, CABAC on)
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- b-pyramid <integer>
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Enables or disables "Pyramidal B-frames" which can improve compression efficiency.
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It may be incompatible with some playback devices (such as the first generation AppleTV).
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Note that this options modifies other parameters (gop-ref-dist, num-ref-frame, gop-pic-size).
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-1 means automatic (on in constant QP mode, off otherwise).
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0 means off (disabled).
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1 means on (enabled).
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Default: -1 (automatic)
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Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.6 of the Media SDK API.
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- mbbrc <boolean>
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Enables macroblock-level bitrate control that generally improves subjective visual quality.
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It may have a negative impact on performance and objective visual quality metrics.
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Default: 1 (on)
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Note: not compatible with Constant QP or !LookAhead rate control methods (ignored).
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Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.6 of the Media SDK API.
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- extbrc <boolean>
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Use extended bitrate control algorithms.
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It generally improves objective visual quality metrics and subjective visual quality,
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but can also lead to violation of HRD conformance and may significantly reduce performance.
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Default: 0 (off)
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Note: not compatible with Constant QP or !LookAhead rate control methods (ignored).
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Caveats: requires driver support for version 1.6 of the Media SDK API.
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- trellis <integer>
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Enables trellis quantization.
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0 means trellis is disabled.
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1 means trellis is enabled for I-frames only.
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2 means trellis is enabled for I and P-frames.
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3 means trellis is enabled for all frames (I, P and B).
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Default: 0 (disabled)
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Note: ignored if the target-usage is too low (usually, only works in combination with tu=1).
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Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.7 of the Media SDK API.
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- lookahead (or la) <boolean>
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Use the !LookAhead (LA or LA_ICQ) bitrate control algorithm.
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Default: 1 (on)
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Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.7 (1.8 for LA_ICQ) of the Media SDK API.
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- lookahead-depth (or la-depth) <integer>
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If !LookAhead bitrate control is enabled, number of frames that are analyzed before encoding, from 11 to 60.
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Default: 40
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Note: may be sanitized to a lower value in some cases to avoid hangs.
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Caveats: requires hardware support (4th gen. Intel Core processor or equivalent), and driver support for version 1.7 of the Media SDK API.
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- force-cqp <boolean>
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In Constant Quality mode, use Constant QP rate control, even if Intelligent Constant Quality is available.
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Default: 0 (ICQ enabled if available)
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- cqp-offset-i <integer>
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- cqp-offset-p <integer>
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- cqp-offset-b <integer>
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In constant QP (CQP) bitrate control mode, specify offset from the global quality/QP value for I, P and B-frames.
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Defaults are 0, 2 and 4, respectively.
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- vbv-maxrate <integer>
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Sets the maximum rate the VBV buffer should be assumed to refill at, in kilobits per second (Kbps).
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Default: 0 (set at runtime by the implementation)
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Note: not compatible with Constant QP, Intelligent Constant Quality or !LookAhead rate control methods (ignored).
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- vbv-bufsize <integer>
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Sets the size of the VBV buffer in kilobits (Kb).
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Default: 0 (set at runtime by the implementation)
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Note: not compatible with Constant QP, Intelligent Constant Quality or !LookAhead rate control methods (ignored).
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- vbv-init <float>
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Sets how full the VBV Buffer must be before playback starts.
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If it is less than 1, then the initial fill is: vbv-init * vbv-bufsize.
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Otherwise it is interpreted as the initial fill in kilobits (Kb).
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Default: 0 (set at runtime by the implementation)
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Note: not compatible with Constant QP, Intelligent Constant Quality or !LookAhead rate control methods (ignored).
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