diff --git a/Dockerfile b/Dockerfile
index dc65683..e4a8c6e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,85 @@
-FROM alpine:latest AS builder
+FROM alpine:3.20 AS builder
+
+# Build FFmpeg.
+RUN apk add --no-cache \
+    rust \
+    cargo \
+    fdk-aac \
+    fdk-aac-dev \
+    clang16 \
+    clang16-static \
+    clang16-libclang \
+    llvm16-dev \
+    libc-dev \
+    pkgconf \
+    git \
+    build-base \
+    nasm \
+    yasm \
+    aom-dev \
+    dav1d-dev \
+    lame-dev \
+    opus-dev \
+    svt-av1-dev \
+    libvorbis-dev \
+    libvpx-dev \
+    x264-dev \
+    x265-dev \
+    numactl-dev \
+    libass-dev \
+    libunistring-dev \
+    gnutls-dev && \
+    mkdir -p /ffmpeg/{ffmpeg_build,bin} && \
+    cd /ffmpeg && \
+    wget -O ffmpeg-7.0.1.tar.bz2 https://ffmpeg.org/releases/ffmpeg-7.0.1.tar.bz2 && \
+    tar xjvf ffmpeg-7.0.1.tar.bz2 && \
+    cd ffmpeg-7.0.1 && \
+    PKG_CONFIG_PATH="/ffmpeg/ffmpeg_build/lib/pkgconfig" ./configure \
+      --prefix="/ffmpeg/ffmpeg_build" \
+      --pkg-config-flags="--static" \
+      --extra-cflags="-I/ffmpeg/ffmpeg_build/include" \
+      --extra-ldflags="-L/ffmpeg/ffmpeg_build/lib" \
+      --extra-libs="-lpthread -lm" \
+      --ld="g++" \
+      --bindir="/ffmpeg/bin" \
+      --enable-gpl \
+      --enable-gnutls \
+      --enable-libaom \
+      --enable-libass \
+      --enable-libfdk-aac \
+      --enable-libfreetype \
+      --enable-libmp3lame \
+      --enable-libopus \
+      --enable-libsvtav1 \
+      --enable-libdav1d \
+      --enable-libvorbis \
+      --enable-libvpx \
+      --enable-libx264 \
+      --enable-libx265 \
+      --enable-nonfree && \
+    PATH="/ffmpeg/bin:$PATH" make -j$(nproc) && \
+    make install && \
+    hash -r
+
+# Build the app.
 WORKDIR /build
 COPY ./ ./
-ARG PKG_CONFIG_PATH=/usr/lib/pkgconfig
-RUN apk add --no-cache ffmpeg-libs ffmpeg-dev clang16 clang16-libclang pkgconf rust cargo
-RUN cd /build && cargo build --release
+RUN cd /build && \
+    export PKG_CONFIG_PATH="/ffmpeg/ffmpeg_build/lib/pkgconfig" && \
+    cargo build --verbose --release
 
-FROM alpine:latest
+FROM alpine:3.20
 WORKDIR /
-RUN apk add --no-cache ffmpeg-libavutil ffmpeg-libavformat ffmpeg-libavfilter ffmpeg-libavdevice dumb-init mailcap tzdata
+RUN apk add --no-cache  \
+    ffmpeg-libavutil  \
+    ffmpeg-libavformat  \
+    ffmpeg-libavfilter  \
+    ffmpeg-libavdevice  \
+    fdk-aac  \
+    dumb-init  \
+    mailcap  \
+    tzdata  \
+    gnutls
 COPY --from=builder /build/target/release/atranscoder-rpc /usr/local/bin
 EXPOSE 8090
 ENTRYPOINT ["/usr/bin/dumb-init", "--", "/usr/local/bin/atranscoder-rpc"]
diff --git a/Dockerfile.scratch b/Dockerfile.scratch
deleted file mode 100644
index d7bfce2..0000000
--- a/Dockerfile.scratch
+++ /dev/null
@@ -1,75 +0,0 @@
-# Initially I wanted to build a slim image using this Dockerfile and static linking.
-# It would use something like this in Cargo.toml:
-#
-# [build-dependencies.clang]
-# version = "2.0.0"
-# default-features = false
-# features = ["static"]
-#
-# [build-dependencies.clang-sys]
-# version = "1.7.0"
-# default-features = false
-# features = ["clang_16_0", "static"]
-#
-# But there are a lot of problems with static linking and clang & clang-sys crates:
-# - https://github.com/KyleMayes/clang-sys/issues/174
-# - https://github.com/KyleMayes/clang-rs/issues/17
-# - https://github.com/KyleMayes/clang-sys/issues/148 (this is the one I *like* the most!)
-#
-# So, no static linking for now, but I don't wanna erase all this gorgeous Dockerfile code, so... I'll let it linger
-# in the repo for now.
-
-# Stage 1: Build the Rust application
-FROM rust:1.78-alpine AS builder
-
-# Set the working directory
-WORKDIR /usr/src/
-
-# Install necessary packages
-RUN apk add --no-cache \
-    ffmpeg-libs \
-    ffmpeg-dev \
-    pkgconf \
-    musl-dev \
-    clang16-static \
-    llvm-dev \
-    zlib-dev \
-    libffi-dev \
-    ncurses-dev \
-    gcc \
-    g++ \
-    git \
-    build-base
-
-# Add target for musl
-RUN rustup target add x86_64-unknown-linux-musl
-
-# Create a new Rust project
-RUN USER=root cargo new atranscoder-rpc
-WORKDIR /usr/src/atranscoder-rpc
-
-# Copy the manifest and lock files
-COPY Cargo.toml Cargo.lock ./
-
-# Set the environment variable for libclang path
-ENV LIBCLANG_PATH=/usr/lib/llvm16/lib
-ENV PKG_CONFIG_PATH=/usr/lib/pkgconfig
-
-# Build dependencies to cache them
-RUN cargo build --release --target x86_64-unknown-linux-musl
-
-# Copy the source code
-COPY src ./src
-
-# Build the project and install the binary
-RUN cargo install --target x86_64-unknown-linux-musl --path . && \
-    mkdir -p /result/{tmp,bin} && \
-    mv /usr/local/cargo/bin/atranscoder-rpc /result/bin
-
-# Stage 2: Create the final minimal image
-FROM scratch
-COPY --from=builder /usr/bin/dumb-init /bin/
-COPY --from=builder /result/bin /bin
-COPY --from=builder /result/tmp /tmp
-EXPOSE 8090
-ENTRYPOINT ["/bin/dumb-init", "--", "/bin/atranscoder-rpc"]
diff --git a/src/transcoder.rs b/src/transcoder.rs
index 73e2fdf..0dd1b77 100644
--- a/src/transcoder.rs
+++ b/src/transcoder.rs
@@ -67,9 +67,6 @@ impl Transcoder {
         encoder.set_rate(sample_rate);
         encoder.set_channel_layout(params.channel_layout);
 
-        #[cfg(not(feature = "ffmpeg_7_0"))]
-        encoder.set_channels(params.channel_layout.channels());
-
         encoder.set_format(
             codec
                 .formats()