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# mlx-video
# mlx-video
MLX-Video is the best package for inference and finetuning of Image-Video-Audio generation models on your Mac using MLX.
## Installation
Install from source:
### Option 1: Install with pip (requires git):
```bash
pip install git+https://github.com/Blaizzy/mlx-video.git
```
### Option 2: Install with uv (ultra-fast package manager, optional):
```bash
uv pip install git+https://github.com/Blaizzy/mlx-video.git
```
### Optional Dependencies
For video encoding/decoding:
```bash
pip install imageio[ffmpeg] pillow
```
Supported models:
### LTX-2
[LTX-2](https://huggingface.co/Lightricks/LTX-Video) is 19B parameter video generation model from Lightricks
## Features
- Text-to-video generation with the LTX-2 19B DiT model
- Two-stage generation pipeline for high-quality output
- 2x spatial upscaling for images and videos
- Optimized for Apple Silicon using MLX
## Usage
> ** Info:** Currently, only the distilled variant is supported. Full LTX-2 feature support is coming soon.
### Text-to-Video Generation
```bash
uv run mlx_video.generate --prompt "A cat walking on grass"
```
With custom settings:
```bash
python -m mlx_video.generate \
--prompt "Ocean waves crashing on a beach at sunset" \
--height 768 \
--width 768 \
--num-frames 65 \
--seed 123 \
--output my_video.mp4
```
### CLI Options
| Option | Default | Description |
|--------|---------|-------------|
| `--prompt`, `-p` | (required) | Text description of the video |
| `--height`, `-H` | 512 | Output height (must be divisible by 64) |
| `--width`, `-W` | 512 | Output width (must be divisible by 64) |
| `--num-frames`, `-n` | 33 | Number of frames (must be 1 + 8*k) |
| `--seed`, `-s` | 42 | Random seed for reproducibility |
| `--fps` | 24 | Frames per second |
| `--output`, `-o` | output.mp4 | Output video path |
| `--save-frames` | false | Save individual frames as images |
| `--model-repo` | Lightricks/LTX-2 | HuggingFace model repository |
## How It Works
The pipeline uses a two-stage generation process:
1. **Stage 1**: Generate at half resolution (e.g., 384x384) with 8 denoising steps
2. **Upsample**: 2x spatial upsampling via LatentUpsampler
3. **Stage 2**: Refine at full resolution (e.g., 768x768) with 3 denoising steps
4. **Decode**: VAE decoder converts latents to RGB video
## Requirements
- macOS with Apple Silicon (M1/M2/M3/M4)
- Python >= 3.11
- MLX >= 0.22.0
## Model Specifications
- **Transformer**: 48 layers, 32 attention heads, 128 dim per head
- **Latent channels**: 128
- **Text encoder**: Gemma 3 with 3840-dim output
- **RoPE**: Split mode with double precision
## Project Structure
```
mlx_video/
├── generate.py # Video generation pipeline
├── convert.py # Weight conversion (PyTorch -> MLX)
├── postprocess.py # Video post-processing utilities
├── utils.py # Helper functions
└── models/
└── ltx/
├── ltx.py # Main LTXModel (DiT transformer)
├── config.py # Model configuration
├── transformer.py # Transformer blocks
├── attention.py # Multi-head attention with RoPE
├── text_encoder.py # Text encoder
├── upsampler.py # 2x spatial upsampler
└── video_vae/ # VAE encoder/decoder
```
## License
MIT