HEIF-ENC(1)                 General Commands Manual                HEIF-ENC(1)

NAME
       heif-enc - convert image to HEIC/HEIF

SYNOPSIS
       heif-enc [-h|--help] [-q QUALITY|--quality QUALITY] [-L|--lossless] [-t
       SIZE|--thumb SIZE] [--no-alpha] [--no-thumb-alpha] [-o
       FILENAME|--output FILENAME] [-v|--verbose] [-P|--params] [-b DEPTH] [-p
       NAME=VALUE] filename[.jpg|.png|.y4m]

DESCRIPTION
       heif-enc Convert image to HEIC/HEIF.

OPTIONS
       -q QUALITY, --quality QUALITY
              Defines quality level between 0 and 100 for the generated output
              file.

       -L, --lossless
              Generate lossless output (-q has no effect)

       -t SIZE, --thumb SIZE
              Generate thumbnail with maximum size SIZE pixels (default: off).

       --no-alpha
              Do not save alpha channel.

       --no-thumb-alpha
              Do not save alpha channel in thumbnail image.

       -o FILENAME, --output FILENAME
              Output filename (optional).

       --verbose
              Enable logging output (more will increase logging level).

       -P, --params
              Show all encoder parameters.

       -b DEPTH
              Bit-depth of generated HEIF file when using 16-bit PNG input
              (default: 10 bit).

       -p NAME=VALUE
              Set additional encoder parameters. See NOTES below.

EXIT STATUS
       0
           Success

       1
           Failure (syntax or usage error; error while loading, converting or
           writing image).

NOTES
       The available input formats depend on the libraries that were available
       at compile time. Supported are JPEG, PNG and Y4M, the file type is
       determined based on the extension of the input file.

       When specifying multiple source images, they will all be saved into the
       same HEIF file.

       When using the x265 encoder, you may pass it any of its parameters by
       prefixing the parameter name with x265:.  Hence, to set the ctu
       parameter, you will have to set x265:ctu in libheif (e.g.: -p
       x265:ctu=64).

       Note that there is no checking for valid parameters when using the
       prefix.

BUGS
       Please reports bugs or issues at https://github.com/strukturag/libheif

AUTHORS
       Dirk Farin, struktur AG

COPYRIGHT
       Copyright (C) 2017 struktur AG

                                                                   HEIF-ENC(1)