Refactored code, added Dockerfile, replaced bash scripts with python alternatives, added README with instructions on running a pipeline

Dockerfile

@@ -0,0 +1,66 @@
+FROM nvidia/cuda:12.4.1-cudnn-devel-ubuntu22.04
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PYTORCH_CUDA_ALLOC_CONF=expandable_segments:True,max_split_size_mb:128
+
+# Base OS tools + media stack + Python toolchain.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3.10 \
+    python3-pip \
+    python3.10-dev \
+    python3.10-venv \
+    ffmpeg \
+    git \
+    git-lfs \
+    ca-certificates \
+    curl \
+    build-essential \
+    pkg-config \
+    ninja-build \
+    libglib2.0-0 \
+    libgl1 \
+    && rm -rf /var/lib/apt/lists/* \
+    && ln -sf /usr/bin/python3.10 /usr/bin/python \
+    && ln -sf /usr/bin/pip3 /usr/bin/pip \
+    && git lfs install
+
+WORKDIR /app
+
+# Install project Python dependencies first for better layer caching.
+COPY requirements.txt /app/requirements.txt
+
+RUN python -m pip install --upgrade pip setuptools wheel \
+    && pip install --index-url https://download.pytorch.org/whl/cu121 torch torchvision torchaudio \
+    && pip install -r /app/requirements.txt \
+    && pip install -U accelerate safetensors
+
+# Copy project code.
+COPY . /app
+
+# Ensure HunyuanVideo source exists in the image.
+ARG HUNYUAN_REPO=https://github.com/Tencent-Hunyuan/HunyuanVideo-1.5.git
+RUN if [ ! -f /app/HunyuanVideo-1.5/requirements.txt ]; then \
+      rm -rf /app/HunyuanVideo-1.5 && \
+      git clone --depth 1 "$HUNYUAN_REPO" /app/HunyuanVideo-1.5; \
+    fi
+
+# Install HunyuanVideo dependencies from upstream README guidance.
+RUN pip install -r /app/HunyuanVideo-1.5/requirements.txt \
+    && pip install --upgrade tencentcloud-sdk-python \
+    && pip install sgl-kernel==0.3.18
+
+# Optional attention backends from Hunyuan docs.
+# Build with: --build-arg INSTALL_OPTIONAL_ATTENTION=1
+ARG INSTALL_OPTIONAL_ATTENTION=0
+RUN if [ "$INSTALL_OPTIONAL_ATTENTION" = "1" ]; then \
+      pip install flash-attn --no-build-isolation && \
+      git clone --depth 1 https://github.com/Tencent-Hunyuan/flex-block-attn.git /tmp/flex-block-attn && \
+      cd /tmp/flex-block-attn && git submodule update --init --recursive && python setup.py install && \
+      git clone --depth 1 https://github.com/cooper1637/SageAttention.git /tmp/SageAttention && \
+      cd /tmp/SageAttention && python setup.py install; \
+    fi
+
+# Default pipeline entrypoint.
+CMD ["python", "run_video_pipeline.py"]