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Copy pathkeyframes.json
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180 lines (180 loc) · 8.1 KB
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{
"id": "LTX2Keyframes",
"description": "Pinning the first and last frames and letting the model fill in the motion between them. The keyframes are conditions - objects built from the arguments the workflow names, each with the latent index it lands on.",
"summary": "LTX-2.5 video with audio between two supplied stills, pinned as the first and last frames.",
"traits": ["has-audio", "image-conditioned", "needs-input-media"],
"cost_drivers": ["num_frames", "width", "height"],
"variables": {
"transformer_weights_dtype": "{uint4}",
"text_encoder_weights_dtype": "{int8}",
"prompt": "prompt:ltx2/polaroid_lighthouse",
"negative_prompt": "constant:diffusers.pipelines.ltx2.utils.DEFAULT_NEGATIVE_PROMPT",
"width": 960,
"height": 544,
"num_frames": 121,
"frame_rate": 24.0,
"first_image": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/flf2v_input_first_frame.png",
"last_image": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/flf2v_input_last_frame.png",
"seed": 42
},
"variable_constraints": {
"width": {
"modulus": 32,
"remainder": 0,
"reason": "LTX-2.5's pipelines refuse a width not divisible by 32 outright (ValueError, not a silent floor), so it is checked here before the pipeline load rather than after it"
},
"height": {
"modulus": 32,
"remainder": 0,
"reason": "LTX-2.5's pipelines refuse a height not divisible by 32 outright (ValueError, not a silent floor), so it is checked here before the pipeline load rather than after it"
},
"num_frames": {
"modulus": 8,
"remainder": 1,
"min_frames": 9,
"reason": "LTX-2.5's video VAE encodes 8 * n + 1 frames, so an off-grid count is not refused by the pipeline but floored to the grid below - a shorter clip than the one asked for. Refused here instead: no 'snap', because rounding a length the other way from the pipeline's own would be a second silent change"
}
},
"seed": "variable:seed",
"steps": [
{
"name": "keyframes_to_video",
"pipeline": {
"configuration": {
"component_type": "LTX2ConditionPipeline",
"pre_load_modules": [
"sdnq"
],
"components": {
"transformer": {
"device": "cuda"
},
"text_encoder": {
"group_offload": {
"offload_type": "leaf_level",
"use_stream": true
}
},
"connectors": {
"group_offload": {
"offload_type": "leaf_level",
"use_stream": true
}
},
"vae": {
"device": "cuda"
},
"audio_vae": {
"device": "cuda"
},
"vocoder": {
"device": "cuda"
},
"duration_head": {
"device": "cuda"
}
}
},
"from_pretrained_arguments": {
"model_name": "Lightricks/LTX-2.5-Diffusers",
"torch_dtype": "torch.bfloat16"
},
"transformer": {
"configuration": {
"component_type": "LTX2VideoTransformer3DModel",
"preserve_device_placement": true
},
"quantization_config": {
"configuration": {
"config_type": "sdnq.SDNQConfig"
},
"arguments": {
"weights_dtype": "variable:transformer_weights_dtype",
"quantization_device": "cuda",
"return_device": "cuda",
"use_quantized_matmul": true,
"dequantize_fp32": false
}
},
"from_pretrained_arguments": {
"model_name": "Lightricks/LTX-2.5-Diffusers",
"subfolder": "transformer",
"torch_dtype": "torch.bfloat16"
}
},
"text_encoder": {
"configuration": {
"component_type": "transformers.Gemma4UnifiedForConditionalGeneration",
"preserve_device_placement": true
},
"quantization_config": {
"configuration": {
"config_type": "sdnq.SDNQConfig"
},
"arguments": {
"weights_dtype": "variable:text_encoder_weights_dtype",
"quantization_device": "cuda",
"return_device": "cpu",
"dequantize_fp32": false,
"modules_to_not_convert": [
"embed_vision",
"embed_audio",
"lm_head"
]
}
},
"from_pretrained_arguments": {
"model_name": "Lightricks/LTX-2.5-Diffusers",
"subfolder": "text_encoder",
"torch_dtype": "torch.bfloat16"
}
},
"arguments": {
"prompt": "variable:prompt",
"negative_prompt": "variable:negative_prompt",
"width": "variable:width",
"height": "variable:height",
"num_frames": "variable:num_frames",
"frame_rate": "variable:frame_rate",
"sigmas": "constant:diffusers.pipelines.ltx2.utils.DISTILLED_SIGMA_VALUES",
"guidance_scale": 1.0,
"audio_guidance_scale": 1.0,
"stg_scale": 0.0,
"audio_stg_scale": 0.0,
"modality_scale": 1.0,
"audio_modality_scale": 1.0,
"output_type": "{np}",
"conditions": [
{
"condition_type": "diffusers.pipelines.ltx2.pipeline_ltx2_condition.LTX2VideoCondition",
"from_arguments": {
"frames": {
"media_type": "image",
"location": "variable:first_image"
},
"index": 0,
"strength": 1.0
}
},
{
"condition_type": "diffusers.pipelines.ltx2.pipeline_ltx2_condition.LTX2VideoCondition",
"from_arguments": {
"frames": {
"media_type": "image",
"location": "variable:last_image"
},
"index": -1,
"strength": 1.0
}
}
]
}
},
"result": {
"content_type": "video/mp4",
"fps": "variable:frame_rate",
"subfolder": "final"
}
}
]
}