build_ffmpeg.yaml

# Taken and adapted from torchaudio.
# Ref: https://github.com/pytorch/audio/blob/main/.github/workflows/ffmpeg.yml
# This job is not directly related to regular CI pipeline.
# It is intended to create FFmpeg binaries that we upload on S3,
# which then will be used during all the build process in CI or local.
#
# This job does not include the uploading part.
# Upload needs to be done manually, and it should be done only once
# per new major release of FFmepg.
name: Build non-GPL FFmpeg from source

on:
  workflow_dispatch:
  pull_request:
    paths:
      - packaging/build_ffmpeg.sh
      - .github/workflows/build_ffmpeg.yaml # self reference
  schedule:
    - cron: '0 0 * * 0'  # on sunday

defaults:
  run:
    shell: bash -l -eo pipefail {0}

jobs:
  LGPL-Linux-x86_64:
    strategy:
      fail-fast: false
      matrix:
        ffmpeg-version: ["4.4.4", "5.1.4", "6.1.1", "7.0.1"]
    uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
    with:
      job-name: Build
      upload-artifact: ffmpeg-lgpl
      repository: pytorch/torchcodec
      script: |
        export FFMPEG_VERSION="${{ matrix.ffmpeg-version }}"
        export FFMPEG_ROOT="${PWD}/ffmpeg"

        packaging/build_ffmpeg.sh

        tar -cf ffmpeg.tar.gz ffmpeg/include ffmpeg/lib

        artifact_dir="${RUNNER_ARTIFACT_DIR}/$(date +%Y-%m-%d)/linux_x86_64"
        mkdir -p "${artifact_dir}"
        mv ffmpeg.tar.gz "${artifact_dir}/${FFMPEG_VERSION}.tar.gz"

  LGPL-macOS:
    strategy:
      fail-fast: false
      matrix:
        ffmpeg-version: ["4.4.4", "5.1.4", "6.1.1", "7.0.1"]
    uses: pytorch/test-infra/.github/workflows/macos_job.yml@main
    with:
      job-name: Build
      upload-artifact: ffmpeg-lgpl
      repository: pytorch/torchcodec
      runner: macos-14-xlarge
      script: |
        export FFMPEG_VERSION="${{ matrix.ffmpeg-version }}"
        export FFMPEG_ROOT="${PWD}/ffmpeg"

        packaging/build_ffmpeg.sh

        tar -cf ffmpeg.tar.gz ffmpeg/include ffmpeg/lib

        artifact_dir="${RUNNER_ARTIFACT_DIR}/$(date +%Y-%m-%d)/macos_$(uname -m)"
        mkdir -p "${artifact_dir}"
        mv ffmpeg.tar.gz "${artifact_dir}/${FFMPEG_VERSION}.tar.gz"