How to install guacenc with docker? – CentOS

This dockerfile is only reference. thanks

# This is a Dockerfile to build the docker image including guacenc service and ffmpeg utility.
# To reduce docker image size, utilize multi-stage build method and copy shared library file required while executing guacenc. 
# Copying shared library method is inspired by this thread "https://gist.github.com/bcardiff/85ae47e66ff0df35a78697508fcb49af"

# mutlti-stage builds ref#
# https://docs.docker.com/develop/develop-images/multistage-build/
# https://docs.docker.com/develop/develop-images/dockerfile_best-practices/

# This Dockerfile is built off the https://github.com/apache/guacamole-server Dockerfile.
# In this repo, only Dockerfile provided. If you're about to build your own docker image, download whole project file from the link above.


# Encode existing session recordings to .m4v:
# $ docker exec -it guac_encoder guacenc -f /recordings/file-name-to-encode

# Convert .m4v to .mp4:
# $ docker exec -it guac_encoder ffmpeg -i /recordings/file-name-to-convert.m4v /records/file-name.mp4



# Use Debian as base for the build
ARG DEBIAN_VERSION=stable
FROM debian:${DEBIAN_VERSION} AS builder


ADD . /src
WORKDIR /src

# Base directory for installed build artifacts.
# Due to limitations of the Docker image build process, this value is
# duplicated in an ARG in the second stage of the build.
#
ARG PREFIX_DIR=/usr/local/guacamole

# Build arguments
ARG BUILD_DIR=/tmp/guacd-docker-BUILD
ARG BUILD_DEPENDENCIES="              
        autoconf                      
        automake                      
        gcc                           
        libcairo2-dev                 
        libjpeg62-turbo-dev           
        libossp-uuid-dev              
        libpango1.0-dev               
        libtool                       
        libwebp-dev                   
        libavcodec-dev                
        libavutil-dev                 
        libswscale-dev                
        make"

# Bring build environment up to date and install build dependencies
RUN apt-get update                         && 
    apt-get install -y $BUILD_DEPENDENCIES && 
    rm -rf /var/lib/apt/lists/*

# Add configuration scripts
COPY src/guacd-docker/bin "${PREFIX_DIR}/bin/"

# Copy source to container for sake of build
COPY . "$BUILD_DIR"

# Build guacamole-server from local source
RUN ${PREFIX_DIR}/bin/build-guacd.sh "$BUILD_DIR" "$PREFIX_DIR"

# # Record the packages of all runtime library dependencies
# RUN ${PREFIX_DIR}/bin/list-dependencies.sh    
#         ${PREFIX_DIR}/sbin/guacd              
#         ${PREFIX_DIR}/lib/libguac-client-*.so 
#         > ${PREFIX_DIR}/DEPENDENCIES

# Copy shared library file for guacenc to src folder located root directory
RUN ldd /usr/local/guacamole/bin/guacenc | tr -s '[:blank:]' 'n' | grep '^/' | 
    xargs -I % sh -c 'mkdir -p $(dirname deps%); cp % deps%;'

#####################################################################
# Use same Debian as the base for the runtime image
FROM jrottenberg/ffmpeg:4.1-alpine

# Override existing ffmpeg ENTRYPOINT
ENTRYPOINT []

# Base directory for installed build artifacts.
# Due to limitations of the Docker image build process, this value is
# duplicated in an ARG in the first stage of the build. See also the
# CMD directive at the end of this build stage.
ARG PREFIX_DIR=/usr/local/guacamole


# Runtime environment
ENV LC_ALL=C.UTF-8
ENV LD_LIBRARY_PATH ${PREFIX_DIR}/lib:$LD_LIBRARY_PATH
ENV PATH ${PREFIX_DIR}/bin:$PATH

# Copy guacenc and lib
COPY --from=builder ${PREFIX_DIR} ${PREFIX_DIR}
# Copy shared library required while executing guacenc
COPY --from=builder /src/deps /

# # Bring runtime environment up to date and install runtime dependencies
# RUN apt-get update                                          && 
#     apt-get install -y $(cat "${PREFIX_DIR}"/DEPENDENCIES)  && 
#     rm -rf /var/lib/apt/lists/*