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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|--out-
       put 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 de-
       termined	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 parame-
       ter, 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 pre-
       fix.

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)

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