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Presets
Thomas Siedel edited this page May 27, 2024
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VVenc has 5 presets that can be set by the option '--preset' and optimizes the trade-off between encoding speed and compression efficiency.
The default preset is medium and give a balanced configuration with good compression and speedup.
| preset | faster | fast | medium | slow | slower |
|---|---|---|---|---|---|
| Motion Estimation | |||||
| SearchRange | 128 | 128 | 384 | 384 | 384 |
| BiPredSearchRange | 1 | 1 | 4 | 4 | 4 |
| minSearchWindow | 96 | 96 | 96 | 96 | 96 |
| maxMergeCand | 4 | 6 | 6 | 6 | 6 |
| FastInterSeachMode | MODE3 | MODE3 | MODE3 | MODE3 | MODE3 |
| MotionEstSearchMethod | fastDiamond | fastDiamond | fastDiamond | fastDiamond | DIAMOND |
| Partitioning | |||||
| CTUSize | 64 | 64 | 128 | 128 | 128 |
| DualITree | 1 | 1 | 1 | 1 | 1 |
| MinQT0 | 4 | 4 | 8 | 8 | 8 |
| MinQT1 | 4 | 4 | 8 | 8 | 8 |
| MinQT2 | 2 | 2 | 4 | 4 | 4 |
| MaxMTTDepth | 0 | 0 | 1 | 2 | 333332* |
| MaxMTTDepthI | 0 | 1 | 2 | 3 | 3 |
| Speedups | |||||
| qtbtt speedup | 7 | 3 | 3 | 2 | 1 |
| fastTTSplit | 0 | 0 | 5 | 5 | 1 |
| contentBasedFastQtbt | 1 | 1 | 1 | 1 | 0 |
| fastHad | 1 | 0 | 0 | 0 | 0 |
| PbIntraFast | 2 | 1 | 1 | 1 | 1 |
| FastMerge | 3 | 3 | 2 | 3 | 1 |
| FastLocalDualTreeMode | 1 | 1 | 1 | 1 | 1 |
| FastSubPel | 2 | 1 | 1 | 1 | 0 |
| FastIntraTools | 0 | 0 | 1 | 0 | 0 |
| FIMMode | 4 | 2 | 0 | 0 | 0 |
| EarlyCU | 2 | 2 | 0 | 0 | 0 |
| IntegerET | 1 | 0 | 0 | 0 | 0 |
| IntraEstDecBit | 3 | 2 | 2 | 1 | 1 |
| numIntraModesFullRD | 1 | 1 | -1 | -1 | -1 |
| reduceIntraChromaModesFullRD | 1 | 1 | 1 | 0 | 0 |
| MeReduceTap | 2 | 2 | 2 | 2 | 2 |
| RefPics | 1 | 222111* | 222221* | 2 | 2 |
| RefPicsSCC | 0 | 0 | 0 | 0 | 0 |
| Tools | |||||
| Affine | 0 | 5 | 4 | 3 | 1 |
| ALF | 0 | 1 | 1 | 1 | 1 |
| ALF Speed | 0 | 1 | 1 | 0 | 0 |
| ALF UnitSize | 128 | 128 | -1 | -1 | -1 |
| BIM | 1 | 1 | 1 | 1 | 2 |
| BCW | 0 | 1 | 0 | 2 | 2 |
| BDOF | 0 | 1 | 1 | 1 | 1 |
| CCALF | 0 | 1 | 1 | 1 | 1 |
| CIIP | 0 | 1 | 0 | 1 | 1 |
| DepQuant | 0 | 1 | 1 | 1 | 1 |
| DMVR | 0 | 1 | 1 | 1 | 1 |
| EDO | 0 | 1 | 2 | 2 | 2 |
| GEO | 0 | 1 | 3 | 1 | 2 |
| AMVR speed | 0 | 5 | 5 | 1 | 1 |
| ISP | 0 | 0 | 3 | 3 | 1 |
| JointCbCr | 0 | 1 | 1 | 1 | 1 |
| LFNST | 0 | 1 | 1 | 1 | 1 |
| LMChroma | 1 | 2 | 1 | 1 | 1 |
| Reshaper | 0 | 0 | 1 | 2 | 2 |
| MCTF | 2 | 2 | 2 | 2 | 2 |
| MCTF Speed | 4 | 3 | 2 | 2 | 2 |
| MMVD | 0 | 3 | 3 | 3 | 1 |
| MMVD allow DisFrac | 0 | 1 | 1 | 1 | 1 |
| MRL | 0 | 1 | 1 | 1 | 1 |
| MTSImplicit | 1 | 1 | 1 | 1 | |
| MIP | 0 | 0 | 1 | 1 | 1 |
| fastMIP | 0 | 0 | 3 | 0 | 0 |
| MMVD | 0 | 0 | 3 | 3 | 1 |
| MRL | 0 | 0 | 1 | 1 | 1 |
| MTS | 0 | 0 | 1 | 1 | 1 |
| PROF | 0 | 1 | 1 | 1 | 1 |
| RDOQ | 2 | 1 | 1 | 1 | 1 |
| selectiveRDOQ | 2 | 0 | 0 | 0 | 0 |
| SBT | 0 | 0 | 0 | 1 | 1 |
| SbTMVP | 0 | 1 | 1 | 1 | 1 |
| SVMD | 0 | 0 | 3 | 3 | 1 |
| nonLinearAlfChroma | 0 | 0 | 0 | 0 | 1 |
| nonLinearAlfLuma | 0 | 0 | 0 | 0 | 1 |
* if > 10 each digit corresponds to a specific temporal layer
| Abbreviation | Meaning | Description |
|---|---|---|
| ALF | Adaptive Loop Filter | in-loop filter where coefficients are signaled in the bitstream based on image content and distortion of reconstructed picture |
| CTU | Coding Tree Unit | Basic processing unit |
| IDR | Instantaneous decoder refresh | random access picture where all reference picture are resetted. |
| ISP | Intra Subpartition | based on Line-Based Intra Prediction (LIP) where intra-predicted blocks are devided into 2 or 4 subpartitions of at least 16 samples |
| MCTF | Motion Compensated Temporal Filtering | Pre-Processing apporach for improving compression efficiency depending on a QP |
| MIP | Matrix-based Intra Prediction | |
| NAL | Network Abstraction Layer | A syntax structure containing an indication of the type of data to follow and bytes containing that data in the form of an RBSP interspersed as necessary with emulation prevention bytes. |
| QP | Quantization Parameter | The Quantization (https://en.wikipedia.org/wiki/Quantization_(image_processing)) is controlled by the quantization parameter in the range from 0 to 63 and is used as an index to derive a scaling matrix. |
| PPS | Picture Parameter Set | NAL type which defines information for one or more pictures within a coded video sequence |
| RBSP | Raw byte sequence payload | A syntax structure containing an integer number of bytes that is encapsulated in a NAL unit. |
| RC | Rate Control | Rate distortion optimization (RDO) to find the optimal balancing of rate and distortion which adjust by a given bit rate according to the video content. |
| RPR | Reference Picture Resampling | Adaptive resolution change without introducing an instantaneous decoder refresh (IDR) or intra random access picture (IRAP) |
| SPS | Sequence Parameter Set | NAL type which defines information for a series of concecutive coded video pictures |
| VVC | Versatile Video Coding1 2 |
- [1] B. Bross, Y.-K. Wang, Y. Ye, S. Liu, J. Chen, G. J. Sullivan, and J.-R. Ohm, “Overview of the Versatile Video Coding (VVC) Standard and its Applications,” IEEE Transactions on Circuits and Systems for Video Technology, doi: 10.1109/TCSVT.2021.3101953, 2021.
- [2] ITU-T and ISO/IEC JTC 1, Versatile Video Coding, Rec. ITU-T H.266 and ISO/IEC 23090-3 (VVC), Aug. 2020.