Install PyAV build dependencies in GPU image

Dockerfile.gpu

@@ -52,9 +52,19 @@ RUN export DEBIAN_FRONTEND=noninteractive \
     python${PYTHON_VERSION} \
     python${PYTHON_VERSION}-venv \
     python3-pip \
+    python${PYTHON_VERSION}-dev \
+    build-essential \
+    pkg-config \
     ffmpeg \
+    libavcodec-dev \
+    libavdevice-dev \
+    libavfilter-dev \
+    libavformat-dev \
+    libavutil-dev \
+    libswresample-dev \
+    libswscale-dev \
     curl wget xz-utils \
-    ffmpeg nginx supervisor \
+    nginx supervisor \
     && rm -rf /var/lib/apt/lists/*
 
 RUN ln -s -f /usr/bin/python${PYTHON_VERSION} /usr/bin/python3 && \