Add system dependencies for Debian/Ubuntu to requirements.txt

Added comprehensive system dependencies section for Debian/Ubuntu:

Required system packages:
- build-essential, cmake, pkg-config (build tools)
- ffmpeg (video processing)
- libavformat-dev, libavcodec-dev, libavdevice-dev, libavutil-dev
- libavfilter-dev, libswscale-dev, libswresample-dev (FFmpeg dev libs)
- libsdl2-dev, libssl-dev, libcurl4-openssl-dev
- python3-dev

These are required for:
- PyAV (av package) - needed by audiocraft/MusicGen
- face-recognition (dlib)
- Building Python extensions

Updated quick install instructions to include system dependencies step.

requirements.txt

@@ -71,6 +71,33 @@ werkzeug>=3.0.1
 # Optional: NSFW Classification
 # onnxruntime>=1.17.0
 
+# ============================================================================
+# SYSTEM DEPENDENCIES (Debian/Ubuntu)
+# ============================================================================
+#
+# BEFORE installing Python packages, install these system dependencies:
+#
+# sudo apt-get update
+# sudo apt-get install -y \
+#     build-essential \
+#     cmake \
+#     pkg-config \
+#     ffmpeg \
+#     libavformat-dev \
+#     libavcodec-dev \
+#     libavdevice-dev \
+#     libavutil-dev \
+#     libavfilter-dev \
+#     libswscale-dev \
+#     libswresample-dev \
+#     libsdl2-dev \
+#     libssl-dev \
+#     libcurl4-openssl-dev \
+#     python3-dev
+#
+# For face-recognition (optional):
+# sudo apt-get install -y libdlib-dev
+#
 # ============================================================================
 # INSTALLATION NOTES FOR PYTHON 3.12+
 # ============================================================================
@@ -90,12 +117,14 @@ werkzeug>=3.0.1
 #    pip install git+https://github.com/huggingface/transformers.git
 #
 # 5. For face-recognition (requires dlib):
-#    - On Ubuntu/Debian: sudo apt-get install cmake
+#    - On Ubuntu/Debian: sudo apt-get install cmake libdlib-dev
 #    - pip install dlib
 #    - pip install face-recognition
 #
-# 6. For audiocraft (MusicGen):
-#    pip install audiocraft
+# 6. For audiocraft (MusicGen) - requires FFmpeg dev libraries:
+#    - Install system dependencies first (see above)
+#    - pip install av  # May need: pip install av --no-binary av
+#    - pip install audiocraft
 #
 # 7. For bark (TTS):
 #    pip install git+https://github.com/suno-ai/bark.git
@@ -104,9 +133,23 @@ werkzeug>=3.0.1
 # QUICK INSTALL (Python 3.12+)
 # ============================================================================
 #
+# # 1. Install system dependencies first:
+# sudo apt-get update && sudo apt-get install -y \
+#     build-essential cmake pkg-config ffmpeg \
+#     libavformat-dev libavcodec-dev libavdevice-dev libavutil-dev \
+#     libavfilter-dev libswscale-dev libswresample-dev \
+#     libsdl2-dev libssl-dev python3-dev
+#
+# # 2. Install PyTorch with CUDA:
 # pip install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu121
+#
+# # 3. Install xformers:
 # pip install --pre xformers
+#
+# # 4. Install latest diffusers and transformers:
 # pip install git+https://github.com/huggingface/diffusers.git
 # pip install git+https://github.com/huggingface/transformers.git
+#
+# # 5. Install remaining dependencies:
 # pip install -r requirements.txt --break-system-packages
 #
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