HEIF-ENC(1) User Commands 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 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 (C) 2017 struktur AG
HEIF-ENC(1)
