KVAZAAR(1)

NAME
kvazaar - open source HEVC encoder

SYNOPSIS
kvazaar -i <input> --input-res <width>x<height> -o <output>

DESCRIPTION

  Required:

-i, --input <filename>
    Input file

--input-res <res>
    Input resolution [auto]
        - auto: Detect from file name.
        - <int>x<int>: width times height

-o, --output <filename>
    Output file

  Presets:

--preset <preset>
    Set options to a preset [medium]
        - ultrafast, superfast, veryfast, faster,
          fast, medium, slow, slower, veryslow
          placebo

  Input:

-n, --frames <integer>
    Number of frames to code [all]

--seek <integer>
    First frame to code [0]

--input-fps <num>[/<denom>]
    Frame rate of the input video [25]

--source-scan-type <string>
    Source scan type [progressive]
        - progressive: Progressive scan
        - tff: Top field first
        - bff: Bottom field first

--input-format <string>
    P420 or P400 [P420]

--input-bitdepth <int>
    8-16 [8]

--loop-input
    Re-read input file forever.

--input-file-format <string>
    Input file format [auto]
         - auto: Check the file ending for format
         - y4m (skips frame headers)
         - yuv

  Options:

--help
    Print this help message and exit.

--version
    Print version information and exit.

--(no-)aud
    Use access unit delimiters. [disabled]

--debug <filename>
    Output internal reconstruction.

--(no-)cpuid
    Enable runtime CPU optimizations. [enabled]

--hash <string>
    Decoded picture hash [checksum]
        - none: 0 bytes
        - checksum: 18 bytes
        - md5: 56 bytes

--(no-)psnr
    Calculate PSNR for frames. [enabled]

--(no-)info
    Add encoder info SEI. [enabled]

--(no-)enable-logging
    Enable logging for regular encoder performance, error messages are always disblayed. [enabled]

--crypto <string>
    Selective encryption. Crypto support must be enabled at compile-time. Can be 'on' or 'off' or a list of features separated with a '+'. [off]
        - on: Enable all encryption features.
        - off: Disable selective encryption.
        - mvs: Motion vector magnitudes.
        - mv_signs: Motion vector signs.
        - trans_coeffs: Coefficient magnitudes.
        - trans_coeff_signs: Coefficient signs.
        - intra_pred_modes: Intra prediction modes.

--key <string>
    Encryption key [16,213,27,56,255,127,242,112,
                    97,126,197,204,25,59,38,30]

--stats-file-prefix
    A prefix used for stats files that include bits, lambda, distortion, and qp for each ctu. These are meant for debugging and are not written unless the prefix is defined.

  Video structure:

-q, --qp <integer>
    Quantization parameter [22]

-p, --period <integer>
    Period of intra pictures [64]
        - 0: Only first picture is intra.
        - 1: All pictures are intra.
        - N: Every Nth picture is intra.

--vps-period <integer>
    How often the video parameter set is re-sent [0]
        - 0: Only send VPS with the first frame.
        - N: Send VPS with every Nth intra frame.

-r, --ref <integer>
    Number of reference frames, in range 1..15 [4]

--gop <string>
    GOP structure [lp-g4d3t1]
        - 0: Disabled
        - 8: B-frame pyramid of length 8
        - 16: B-frame pyramid of length 16
        - lp-<string>: Low-delay P/B-frame GOP
          (e.g. lp-g8d4t2, see README)

--intra-qp-offset <int>: QP offset for intra frames [-51..51] [auto]
        - N: Set QP offset to N.
        - auto: Select offset automatically based
          on GOP length.

--(no-)open-gop
    Use open GOP configuration. [enabled]

--cqmfile <filename>
    Read custom quantization matrices from a file.

--scaling-list <string>: Set scaling list mode. [off]
        - off: Disable scaling lists.
        - custom: use custom list (with --cqmfile).
        - default: Use default lists.

--bitrate <integer>
    Target bitrate [0]
        - 0: Disable rate control.
        - N: Target N bits per second.

--rc-algorithm <string>: Select used rc-algorithm. [lambda]
        - lambda: rate control from:
          DOI: 10.1109/TIP.2014.2336550
        - oba: DOI: 10.1109/TCSVT.2016.2589878

--(no-)intra-bits
    Use Hadamard cost based allocation for intra frames. Default on for gop 8 and off for lp-gop

--(no-)clip-neighbour
    On oba based rate control whether to clip lambda values to same frame's ctus or previous'. Default on for RA GOPS and disabled for LP.

--(no-)lossless
    Use lossless coding. [disabled]

--mv-constraint <string>
    Constrain movement vectors. [none]
        - none: No constraint
        - frametile: Constrain within the tile.
        - frametilemargin: Constrain even more.

--roi <filename>
    Use a delta QP map for region of interest. Reads an array of delta QP values from a file. Text and binary files are supported and detected from the file extension (.txt/.bin). If a known extension is not found, the file is treated as a text file. The file can include one or many ROI frames each in the following format: width and height of the QP delta map followed by width * height delta QP values in raster order. In binary format, width and height are 32-bit integers whereas the delta QP values are signed 8-bit values. The map can be of any size and will be scaled to the video size. The file reading will loop if end of the file is reached. See roi.txt in the examples folder.

--set-qp-in-cu
    Set QP at CU level keeping pic_init_qp_minus26. in PPS and slice_qp_delta in slize header zero.

--(no-)erp-aqp
    Use adaptive QP for 360 degree video with equirectangular projection. [disabled]

--level <number>
    Use the given HEVC level in the output and give an error if level limits are exceeded. [6.2]
        - 1, 2, 2.1, 3, 3.1, 4, 4.1, 5, 5.1, 5.2, 6,
          6.1, 6.2

--force-level <number>
    Same as --level but warnings instead of errors.

--high-tier
    Used with --level. Use high tier bitrate limits instead of the main tier limits during encoding. High tier requires level 4 or higher.

--(no-)vaq <integer>
    Enable variance adaptive quantization with given strength, in range 1..20. Recommended: 5. [disabled]

  Compression tools:

--(no-)deblock <beta:tc>
    Deblocking filter. [0:0]
        - beta: Between -6 and 6
        - tc: Between -6 and 6

--sao <string>
    Sample Adaptive Offset [full]
        - off: SAO disabled
        - band: Band offset only
        - edge: Edge offset only
        - full: Full SAO

--(no-)rdoq
    Rate-distortion optimized quantization [enabled]

--(no-)rdoq-skip
    Skip RDOQ for 4x4 blocks. [disabled]

--(no-)signhide
    Sign hiding [disabled]

--(no-)smp
    Symmetric motion partition [disabled]

--(no-)amp
    Asymmetric motion partition [disabled]

--rd <integer>
    Mode search complexity [0]
        - 0: Skip intra if inter is good enough.
        - 1: Rough intra mode search with SATD.
        - 2: Refine mode search with SSE.
        - 3: More SSE candidates for inter and
             chroma mode search for 4x4 intra.
        - 4: Even more SSE candidates for both.
        - 5: Try all intra modes.

--(no-)mv-rdo
    Rate-distortion optimized motion vector costs [disabled]

--(no-)zero-coeff-rdo
    If a CU is set inter, check if forcing zero residual improves the RD cost. [enabled]

--(no-)full-intra-search
    Try all intra modes during rough search. [disabled]

--(no-)intra-chroma-search
    Test non-derived intra chroma modes.
        [disabled]

--(no-)transform-skip
    Try transform skip [disabled]

--me <string>
    Integer motion estimation algorithm [hexbs]
        - hexbs: Hexagon Based Search
        - tz: Test Zone Search
        - full: Full Search
        - full8, full16, full32, full64
        - dia: Diamond Search

--me-steps <integer>
    Motion estimation search step limit. Only affects 'hexbs' and 'dia'. [-1]

--subme <integer>
    Fractional pixel motion estimation level [4]
        - 0: Integer motion estimation only
        - 1: + 1/2-pixel horizontal and vertical
        - 2: + 1/2-pixel diagonal
        - 3: + 1/4-pixel horizontal and vertical
        - 4: + 1/4-pixel diagonal

--(no-)fast-bipred
    Only perform fast bipred search. [enabled]

--pu-depth-inter <int>-<int>
    Inter prediction units sizes [0-3]
        - 0, 1, 2, 3: from 64x64 to 8x8
        - Accepts a list of values separated by ','
          for setting separate depths per GOP layer
          (values can be omitted to use the first
          value for the respective layer).

--pu-depth-intra <int>-<int>
    Intra prediction units sizes [1-4]
        - 0, 1, 2, 3, 4: from 64x64 to 4x4
        - Accepts a list of values separated by ','
          for setting separate depths per GOP layer
          (values can be omitted to use the first
          value for the respective layer).

--ml-pu-depth-intra
    Predict the pu-depth-intra using machine
     learning trees, overrides the
     --pu-depth-intra parameter. [disabled]

--(no-)combine-intra-cus: Whether the encoder tries to code a cu
        on lower depth even when search is not
        performed on said depth. Should only
        be disabled if cus absolutely must not
        be larger than limited by the search.
        [enabled]

--force-inter
    Force the encoder to use inter always. This is mostly for debugging and is not guaranteed to produce sensible bitstream or work at all. [disabled]

--tr-depth-intra <int>
    Transform split depth for intra blocks [0]

--(no-)bipred
    Bi-prediction [disabled]

--cu-split-termination <string>
    CU split search termination [zero]
        - off: Don't terminate early.
        - zero: Terminate when residual is zero.

--me-early-termination <string>
    Motion estimation termination [on]
        - off: Don't terminate early.
        - on: Terminate early.
        - sensitive: Terminate even earlier.

--fast-residual-cost <int>
    Skip CABAC cost for residual coefficients
        when QP is below the limit. [0]

--fast-coeff-table <string>
    Read custom weights for residual
         coefficients from a file instead of using
         defaults [default]

--fast-rd-sampling
    Enable learning data sampling for fast coefficient
                            table generation

--fastrd-accuracy-check
    Evaluate the accuracy of fast coefficient
     prediction

--fastrd-outdir
    Directory to which to output sampled data or accuracy
                            data, into <fastrd-outdir>/0.txt to 50.txt, one file
                            for each QP that blocks were estimated on

--(no-)intra-rdo-et
    Check intra modes in rdo stage only until a zero coefficient CU is found. [disabled]

--(no-)early-skip
    Try to find skip cu from merge candidates. Perform no further search if skip is found. For rd=0..1: Try the first candidate. For rd=2.. Try the best candidate based
                 on luma satd cost. [enabled]

--max-merge <integer>
    Maximum number of merge candidates, 1..5 [5]

--(no-)implicit-rdpcm
    Implicit residual DPCM. Currently only supported with lossless coding. [disabled]

--(no-)tmvp
    Temporal motion vector prediction [enabled]

  Parallel processing:

--threads <integer>
    Number of threads to use [auto]
        - 0: Process everything with main thread.
        - N: Use N threads for encoding.
        - auto: Select automatically.

--owf <integer>
    Frame-level parallelism [auto]
        - N: Process N+1 frames at a time.
        - auto: Select automatically.

--(no-)wpp
    Wavefront parallel processing. [enabled] Enabling tiles automatically disables WPP. To enable WPP with tiles, re-enable it after enabling tiles. Enabling wpp with tiles is, however, an experimental feature since it is not supported in any HEVC profile.

--tiles <int>x<int>
    Split picture into width x height uniform tiles.

--tiles-width-split <string>|u<int>
        - <string>: A comma-separated list of tile
                    column pixel coordinates.
        - u<int>: Number of tile columns of uniform
                  width.

--tiles-height-split <string>|u<int>
        - <string>: A comma-separated list of tile
                    row column pixel coordinates.
        - u<int>: Number of tile rows of uniform
                  height.

--slices <string>
    Control how slices are used.
        - tiles: Put tiles in independent slices.
        - wpp: Put rows in dependent slices.
        - tiles+wpp: Do both.

--partial-coding <x-offset>!<y-offset>!<slice-width>!<slice-height>

    Encode partial frame. Parts must be merged to form a valid bitstream. X and Y are CTU offsets. Slice width and height must be divisible by CTU in pixels unless it is the last CTU row/column. This parameter is used by kvaShare.

  Video Usability Information:

--sar <width:height>
    Specify sample aspect ratio

--overscan <string>
    Specify crop overscan setting [undef]
        - undef, show, crop

--videoformat <string>
    Specify video format [undef]
        - undef, component, pal, ntsc, secam, mac

--range <string>
    Specify color range [tv]
        - tv, pc

--colorprim <string>
    Specify color primaries [undef]
        - undef, bt709, bt470m, bt470bg,
          smpte170m, smpte240m, film, bt2020

--transfer <string>
    Specify transfer characteristics [undef]
        - undef, bt709, bt470m, bt470bg,
          smpte170m, smpte240m, linear, log100,
          log316, iec61966-2-4, bt1361e,
          iec61966-2-1, bt2020-10, bt2020-12

--colormatrix <string>
    Specify color matrix setting [undef]
        - undef, bt709, fcc, bt470bg, smpte170m,
          smpte240m, GBR, YCgCo, bt2020nc, bt2020c

--chromaloc <integer>
    Specify chroma sample location (0 to 5) [0]