add capnp and ffmpeg (#4)

ffmpeg/build.sh

@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+FFMPEG_VERSION="7.1"
+INSTALL_DIR="$DIR/ffmpeg/install"
+
+# Idempotent: skip if already built
+if [ -x "$INSTALL_DIR/bin/ffmpeg" ]; then
+  echo "ffmpeg already present, skipping build."
+  exit 0
+fi
+
+NJOBS="$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 2)"
+PREFIX="$DIR/build/prefix"
+mkdir -p "$DIR/build"
+
+# --- Build x264 (static) ---
+if [ ! -d "x264-src" ]; then
+  git clone --depth 1 --branch stable https://code.videolan.org/videolan/x264.git x264-src
+fi
+
+cd x264-src
+./configure \
+  --prefix="$PREFIX" \
+  --enable-static \
+  --disable-shared \
+  --disable-cli \
+  --disable-opencl \
+  --enable-pic
+make -j"$NJOBS"
+make install
+cd "$DIR"
+
+# --- Build FFmpeg ---
+if [ ! -d "ffmpeg-src" ]; then
+  git clone --depth 1 --branch "n${FFMPEG_VERSION}" https://github.com/FFmpeg/FFmpeg.git ffmpeg-src
+fi
+
+cd ffmpeg-src
+PKG_CONFIG_PATH="$PREFIX/lib/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}" \
+./configure \
+  --prefix="$PREFIX" \
+  --enable-gpl \
+  --enable-static \
+  --disable-shared \
+  --enable-libx264 \
+  --enable-pic \
+  --disable-doc \
+  --disable-ffplay \
+  --disable-autodetect \
+  --disable-everything \
+  --enable-encoder=libx264,aac,ffvhuff,rawvideo,png \
+  --enable-decoder=h264,hevc,ffvhuff,aac,rawvideo,png,mjpeg,mp3,pcm_s16le \
+  --enable-muxer=mpegts,matroska,mp4,hevc,rawvideo,image2,null,mov \
+  --enable-demuxer=hevc,matroska,mpegts,mov,rawvideo,image2,aac,concat \
+  --enable-parser=h264,hevc,aac,mpegaudio \
+  --enable-protocol=file,pipe \
+  --enable-filter=blend,vflip,format,scale,aformat,anull,aresample,null \
+  --enable-bsf=extract_extradata,h264_mp4toannexb,hevc_mp4toannexb \
+  --extra-cflags="-I$PREFIX/include" \
+  --extra-ldflags="-L$PREFIX/lib"
+make -j"$NJOBS"
+make install
+cd "$DIR"
+
+# Copy to package install dir
+rm -rf "$INSTALL_DIR"
+mkdir -p "$INSTALL_DIR"/{bin,lib,include}
+
+# Binaries
+cp "$PREFIX/bin/ffmpeg" "$INSTALL_DIR/bin/"
+cp "$PREFIX/bin/ffprobe" "$INSTALL_DIR/bin/"
+
+# Libraries
+for lib in libavformat.a libavcodec.a libavutil.a libswresample.a libx264.a; do
+  cp "$PREFIX/lib/$lib" "$INSTALL_DIR/lib/"
+done
+
+# Headers
+for dir in libavformat libavcodec libavutil libswresample; do
+  cp -r "$PREFIX/include/$dir" "$INSTALL_DIR/include/"
+done
+
+# Strip binaries
+strip "$INSTALL_DIR/bin/ffmpeg" "$INSTALL_DIR/bin/ffprobe" 2>/dev/null || true
+
+# Clean up
+rm -rf x264-src ffmpeg-src "$DIR/build"
+
+echo "Installed ffmpeg to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"