Update Dockerfile

Dockerfile

@@ -23,8 +23,20 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libgomp1 \
     ffmpeg \
     curl \
+    tar \
+    xz-utils \
     && rm -rf /var/lib/apt/lists/*
 
+# Install static ffmpeg build (includes libx264)
+RUN echo "Installing static ffmpeg..." \
+ && curl -L -o /tmp/ffmpeg.tar.xz "https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz" \
+ && tar -xJf /tmp/ffmpeg.tar.xz -C /tmp \
+ && cp /tmp/ffmpeg-*-static/ffmpeg /usr/local/bin/ffmpeg \
+ && cp /tmp/ffmpeg-*-static/ffprobe /usr/local/bin/ffprobe \
+ && chmod +x /usr/local/bin/ffmpeg /usr/local/bin/ffprobe \
+ && rm -rf /tmp/ffmpeg* \
+ && ffmpeg -version
+
 # Create app directory
 WORKDIR /app