rav1e-ch --help

rav1e-ch.txt

AV1 video encoder

Usage: 

Commands:
  advanced
          Advanced features
  help
          Print this message or the help of the given subcommand(s)

Options:
  -h, --help
          Print help information (use `-h` for a summary)

  -V, --version
          Print version information

INPUT/OUTPUT:
  -o, --output <OUTPUT>
          Compressed AV1 in IVF video output

  -y
          Overwrite output file

  <INPUT>
          Uncompressed YUV4MPEG2 video input

THREADING:
      --threads <THREADS>
          Set the threadpool size. If 0, will use the number of logical CPUs. rav1e will use up to
          this many threads. Additional tiles may be needed to increase thread utilization
          
          [default: 0]

      --tile-rows <TILE_ROWS>
          Number of tile rows. Must be a power of 2. rav1e may override this based on video
          resolution
          
          [default: 0]

      --tile-cols <TILE_COLS>
          Number of tile columns. Must be a power of 2. rav1e may override this based on video
          resolution
          
          [default: 0]

      --tiles <TILES>
          Number of tiles. Tile-cols and tile-rows are overridden so that the video has at least
          this many tiles

      --slots <SLOTS>
          Maximum number of GOPs that can be encoded in parallel
          
          [default: 0]

ENCODE SETTINGS:
      --first-pass <STATS_FILE>
          Perform the first pass of a two-pass encode, saving the pass data to the specified file
          for future passes

      --second-pass <STATS_FILE>
          Perform the second pass of a two-pass encode, reading the pass data saved from a previous
          pass from the specified file

  -l, --limit <LIMIT>
          Maximum number of frames to encode
          
          [default: 0]

      --skip <SKIP>
          Skip n number of frames and encode
          
          [default: 0]

      --quantizer <QUANTIZER>
          Quantizer (0-255), smaller values are higher quality [default: 100]

      --min-quantizer <MIN_QUANTIZER>
          Minimum quantizer (0-255) to use in bitrate mode [default: 0]

  -b, --bitrate <BITRATE>
          Bitrate (kbps)

  -s, --speed <SPEED>
          Speed level (0 is best quality, 10 is fastest)
          Speeds 10 and 0 are extremes and are generally not recommended
          
          [default: 6]

      --scd-speed <SCD_SPEED>
          Speed level for scene-change detection, 0: best quality, 1: fastest mode. [default: 0 for
          s0-s9, 1 for s10]

  -i, --min-keyint <MIN_KEYINT>
          Minimum interval between keyframes
          
          [default: 12]

  -I, --keyint <KEYINT>
          Maximum interval between keyframes. When set to 0, disables fixed-interval keyframes
          
          [default: 240]

  -S, --switch-frame-interval <SWITCH_FRAME_INTERVAL>
          Maximum interval between switch frames. When set to 0, disables switch frames
          
          [default: 0]

      --reservoir-frame-delay <RESERVOIR_FRAME_DELAY>
          "Number of frames over which rate control should distribute the reservoir [default:
          min(240, 1.5x keyint)] A minimum value of 12 is enforced

      --low-latency
          Low latency mode; disables frame reordering. Has a significant speed-to-quality trade-off

      --no-scene-detection
          Disables scene detection entirely. Has a significant speed-to-quality trade-off in full
          encodes. Useful for chunked encoding

      --rdo-lookahead-frames <RDO_LOOKAHEAD_FRAMES>
          Number of frames encoder should lookahead for RDO purposes\n\ [default value for speed
          levels: 10,9 - 10; 8,7,6 - 20; 5,4,3 - 30; 2,1,0 - 40]

      --tune <TUNE>
          Quality tuning
          
          [default: Psychovisual]

      --still-picture
          Still picture mode

      --photon-noise <PHOTON_NOISE>
          Uses grain synthesis to add photon noise to the resulting encode. Takes a strength value
          0-64
          
          [default: 0]

      --film-grain-table <FILM_GRAIN_TABLE>
          Uses a film grain table file to apply grain synthesis to the encode. Uses the same table
          file format as aomenc and svt-av1

VIDEO METADATA:
      --range <RANGE>
          Pixel range

      --primaries <PRIMARIES>
          Color primaries used to describe color parameters

      --transfer <TRANSFER>
          Transfer characteristics used to describe color parameters

      --matrix <MATRIX>
          Matrix coefficients used to describe color parameters

      --mastering-display <MASTERING_DISPLAY>
          Mastering display primaries in the form of G(x,y)B(x,y)R(x,y)WP(x,y)L(max,min)

      --content-light <CONTENT_LIGHT>
          Content light level used to describe content luminosity (cll,fall)

      --frame-rate <FRAME_RATE>
          Constant frame rate to set at the output (inferred from input when omitted)

      --time-scale <TIME_SCALE>
          The time scale associated with the frame rate if provided (ignored otherwise)
          
          [default: 0]

LEVEL:
      --level <LEVEL>
          AV1 level to target in the form <major>.<minor>, e.g. 3.1. Specify "unconstrained" for no
          level constraints or "auto" to let the encoder choose (default)

DEBUGGING:
      --benchmark
          Provide a benchmark report at the end of the encoding

  -v, --verbose
          Verbose logging; outputs info for every frame

  -q, --quiet
          Do not output any status message

      --psnr
          Calculate and display PSNR metrics

      --metrics
          Calculate and display several metrics including PSNR, SSIM, CIEDE2000 etc

  -r, --reconstruction <RECONSTRUCTION>
          Outputs a Y4M file containing the output from the decoder