feat: add initial Dockerfile

.github/workflows/workflow.yml

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+name: Build and release
+
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+
+concurrency: # Run release builds sequentially, cancel outdated PR builds
+  group: ci-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+
+    permissions: # Grant write access to github.token within non-pull_request builds
+      contents: write
+      id-token: write
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        persist-credentials: false
+
+    - id: release
+      name: Prepare release
+      uses: mgoltzsche/conventional-release@v0
+
+    - name: Set up qemu
+      uses: docker/setup-qemu-action@v3
+      with:
+        platforms: all
+
+    - name: Build
+      if: '!steps.release.outputs.publish' # during non-release build
+      run: |
+        make build-release
+
+    - name: Log into GitHub Container Registry
+      if: steps.release.outputs.publish # during release build
+      run: echo "${{ github.token }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+    - name: Publish release
+      if: steps.release.outputs.publish # during release build
+      run: |
+        make release VERSION=$RELEASE_VERSION
+

Dockerfile

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+# Build build base image
+FROM python:3-alpine3.19 AS buildbase
+RUN apk add --update --no-cache git g++ pkgconf musl-dev qtchooser qt5-qtbase-dev eigen-dev yaml-dev
+
+# Build Gaia
+FROM buildbase AS gaia
+RUN apk add --update --no-cache swig
+# Gaia 2.4.6 + patches from master (python 3 support) from 2022
+ARG GAIA_VERSION=0d0942bf4748b40069977702715454ae084063c9
+RUN set -eux; \
+	git clone -q https://github.com/MTG/gaia.git /gaia-src; \
+	cd /gaia-src; \
+	git checkout $GAIA_VERSION
+WORKDIR /gaia-src
+RUN set -eux; \
+	[ ! `uname -m` = aarch64 ] || sed -i '/sse2/d' wscript; \
+	./waf configure; \
+	./waf; \
+	./waf install --destdir /gaia
+
+# Build essentia library and example extractors
+FROM buildbase AS essentia
+RUN apk add --update --no-cache fftw-dev ffmpeg4-dev libsamplerate-dev taglib-dev chromaprint-dev
+COPY --from=gaia /gaia /
+#ARG ESSENTIA_VERSION=v2.1_beta5
+#RUN git clone -q --branch $ESSENTIA_VERSION --depth=1 https://github.com/MTG/essentia.git /essentia-src
+ARG ESSENTIA_VERSION=95c996e312ad6de0530bc43772ee1677d9e738c7
+RUN set -eux; \
+	git clone -q https://github.com/MTG/essentia.git /essentia-src; \
+	cd /essentia-src; \
+	git checkout $ESSENTIA_VERSION
+WORKDIR /essentia-src
+RUN set -eux; \
+	./waf configure --build-static --with-gaia --with-examples; \
+	./waf; \
+	./waf install --destdir /essentia
+
+# Download SVM models
+FROM alpine:3.19 AS models
+ARG ESSENTIA_MODEL_VERSION=v2.1_beta5
+RUN set -eux; \
+	mkdir -p /tmp/svm-models; \
+	wget -qO - https://essentia.upf.edu/svm_models/essentia-extractor-svm_models-${ESSENTIA_MODEL_VERSION}.tar.gz | tar -C /tmp/svm-models -xzf -; \
+	mv /tmp/svm-models/essentia-extractor-svm_models-$ESSENTIA_MODEL_VERSION /svm-models
+
+# Build container image without build dependencies
+FROM alpine:3.19 AS final
+RUN apk add --update --no-cache qt5-qtbase yaml fftw taglib libsamplerate \
+	ffmpeg4 ffmpeg4-libavcodec ffmpeg4-libavformat ffmpeg4-libavutil \
+	ffmpeg4-libswresample \
+	chromaprint
+COPY --from=essentia /essentia /
+COPY --from=models /svm-models /var/lib/essentia/svm-models/beta5
+COPY profile.yaml /etc/essentia/
+
+# Verify that all libraries are linked without adding another image layer
+FROM final
+RUN ldd /usr/local/bin/essentia_streaming_extractor_music
+
+FROM final

LICENSE

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Makefile

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+IMAGE ?= ghcr.io/mgoltzsche/essentia
+VERSION ?= dev
+PLATFORMS ?= linux/arm64/v8,linux/amd64
+
+BUILDER := essentia-builder
+BUILD_OPTS :=
+
+all: build
+
+.PHONY: build
+build:
+	docker build --force-rm -t $(IMAGE):$(VERSION) .
+
+build-release: create-builder
+	docker buildx build --builder=$(BUILDER) --platform=$(PLATFORMS) $(BUILD_OPTS) --force-rm -t $(IMAGE):$(VERSION) -t $(IMAGE):latest .
+
+create-builder:
+	docker buildx inspect --name=$(BUILDER) >/dev/null 2<&1 || docker buildx create --name=$(BUILDER) >/dev/null
+
+delete-builder:
+	docker buildx rm --name=$(BUILDER)
+
+release: BUILD_OPTS=--push
+release: build-release
+
+enable-qemu:
+	docker run --rm --privileged multiarch/qemu-user-static:7.2.0-1 --reset -p yes
+

README.md

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+# essentia-container
+
+An alpine-based [Essentia](https://essentia.upf.edu/) extractor docker container image.
+
+Essentia extractors allow to extract low and high level musical information from audio data (e.g. `average_loudness`, `bpm`, `danceability`, `electronic`).
+Some of the extracted fields and detection accurracies are described [here](https://essentia.upf.edu/svm_models/accuracies_v2.1_beta1.html) (for an older version, though).
+
+Differences compared to the [official pre-built binaries](https://essentia.upf.edu/extractors/) and [container](https://github.com/MTG/essentia-docker) (as of 2023):
+* The binaries are compiled with [Gaia](https://github.com/MTG/gaia).
+* Contains the [SVM models](https://essentia.upf.edu/svm_models/) and a corresponding [example profile](./profile.yaml).
+* Uses Alpine Linux base image instead of Debian.
+* Multi-arch image that works on both amd64 and arm64 Linux machines.
+
+## Usage
+
+The following example shows how to download an audio file, analyze it using [`essentia_streaming_extractor_music`](https://essentia.upf.edu/streaming_extractor_music.html) and print the result JSON:
+```sh
+docker run --rm ghcr.io/mgoltzsche/essentia sh -euxc '
+  URL=https://file-examples.com/storage/febcc861de6574e979a4c35/2017/11/file_example_OOG_2MG.ogg
+  wget -qO input.ogg $URL
+  essentia_streaming_extractor_music input.ogg - /etc/essentia/profile.yaml'
+```
+
+For more information, see the [Essentia Extractor documentation](https://essentia.upf.edu/extractors_out_of_box.html#extractors).
+
+## Credits
+
+Essentia is an open-source C++ library with Python bindings for audio analysis and audio-based music information retrieval.
+It is released under the Affero GPLv3 license and is also available under proprietary license upon request.
+This project is just a redistribution of the library, its extractor CLIs as well as its SVM models as a Linux container image.
+[Learn more about the Essentia project](http://essentia.upf.edu)