Dockerfile

# Transcodarr — automated media transcoder
# Supports NVIDIA NVENC, Intel QSV, and CPU-only encoding
ARG GPU_TYPE=nvidia
FROM lscr.io/linuxserver/ffmpeg@sha256:8b7f2d546f28761e4eb5d6ed611f8cab3bd842667f7cea379c196040eed8f254

LABEL org.opencontainers.image.title="Transcodarr"
LABEL org.opencontainers.image.description="Automated media transcoder with GPU-accelerated encoding"
LABEL org.opencontainers.image.authors="jb14813"

# Install runtime dependencies.
# jq is used by probe_hdr_metadata() in transcodarr-lib.sh to extract
# SMPTE 2086 mastering-display + MaxCLL/MaxFALL side-data from ffprobe
# JSON so we can forward them to the HDR-preserve encoder path.
RUN apt-get update -qq && \
    apt-get install -y -qq --no-install-recommends \
      curl perl valkey-server valkey-tools jq && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/*

# Rebuild libplacebo with explicit vkGetInstanceProcAddr binding.
# linuxserver/ffmpeg ships libplacebo built without -Dvk-proc-addr=enabled
# (verified 2026-05-15 via nm -D; preserved through the 2026-05-16 base
# bump). vf_libplacebo then fails on every HDR source with:
#   "No vkGetInstanceProcAddr function provided, and libplacebo built
#    without linking against this function!"
# Match the base image's libplacebo version (v7.360.1, SOVERSION 360) so
# ffmpeg's dynamic-link ABI stays intact.
#
# libdovi (Dolby Vision metadata library) is built from Rust source first —
# Ubuntu/Debian don't ship a libdovi-dev apt package, so we install cargo
# + cargo-c, compile libdovi via the dovi_tool repo's dolby_vision crate
# (matches the linuxserver/docker-ffmpeg base image's recipe), then build
# libplacebo with -Dlibdovi=enabled so vf_libplacebo can passthrough DV
# metadata. Without libdovi our libplacebo would still link/load, but
# Dolby Vision sources (transfer=dvhe) would lose metadata handling.
#
# libshaderc1 is pulled in as a dep of libshaderc-dev. Our libplacebo
# rebuild links against /usr/lib/x86_64-linux-gnu/libshaderc.so.1 (the
# Debian-packaged shaderc), NOT the base image's libshaderc_shared.so.1.
# Mark it as manually installed so the apt-get autoremove below doesn't
# drag it out — without this, ffmpeg fails with "libshaderc.so.1: cannot
# open shared object file". libvulkan1 isn't needed at runtime since
# libplacebo resolves libvulkan.so.1 from the base image's /usr/local/lib.
RUN apt-get update -qq && \
    apt-get install -y -qq --no-install-recommends \
      git build-essential meson ninja-build pkg-config \
      libvulkan-dev libshaderc-dev libssl-dev ca-certificates && \
    apt-mark manual libshaderc1 && \
    # Install latest stable Rust via rustup. Ubuntu 24.04 ships rustc 1.75
    # but recent dolby_vision crates require >= 1.79. We use --profile
    # minimal to skip documentation source and keep the layer small (~250MB
    # toolchain), and cargo install cargo-c separately since it needs the
    # newer rustc too.
    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
      | sh -s -- -y --default-toolchain stable --profile minimal --no-modify-path && \
    export PATH="/root/.cargo/bin:$PATH" && \
    cargo install cargo-c --locked && \
    # Build libdovi (Rust) first so libplacebo's meson can find it.
    git clone --depth 1 --branch 2.1.3 \
      https://github.com/quietvoid/dovi_tool.git /tmp/dovi_tool && \
    cd /tmp/dovi_tool/dolby_vision && \
    cargo cinstall --release --prefix=/usr/local --library-type=cdylib && \
    ldconfig && \
    git clone --depth 1 --branch v7.360.1 --recursive \
      https://code.videolan.org/videolan/libplacebo.git /tmp/libplacebo && \
    cd /tmp/libplacebo && \
    PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/lib/x86_64-linux-gnu/pkgconfig \
    meson setup build --buildtype=release \
      -Dvulkan=enabled -Dvk-proc-addr=enabled \
      -Dshaderc=enabled -Dlibdovi=enabled && \
    ninja -C build && \
    install -m644 build/src/libplacebo.so.360 \
      /usr/local/lib/x86_64-linux-gnu/libplacebo.so.360 && \
    ldconfig && \
    # Uninstall rustup toolchain + clean apt build deps + scratch dirs.
    /root/.cargo/bin/rustup self uninstall -y && \
    apt-get purge -y git build-essential meson ninja-build pkg-config \
      libvulkan-dev libshaderc-dev libssl-dev && \
    apt-get autoremove -y && \
    rm -rf /tmp/libplacebo /tmp/dovi_tool /root/.cargo /root/.rustup \
           /var/lib/apt/lists/*

# Intel QSV: install media driver (only for intel builds)
ARG GPU_TYPE
RUN if [ "$GPU_TYPE" = "intel" ]; then \
      apt-get update -qq && \
      apt-get install -y -qq --no-install-recommends \
        intel-media-va-driver-non-free libmfx1 libva-drm2 libva2 && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*; \
    fi

COPY scripts/ /scripts/
RUN chmod +x /scripts/*.sh /scripts/*.pl