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 and exit. Input file is not required or used.

       -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 © 2017 struktur AG

                                                                                      HEIF-ENC(1)