{ "id": "394ed254-7306-42a2-9ae6-aa880ce4456d", "revision": 0, "last_node_id": 9005, "last_link_id": 13796, "nodes": [ { "id": 5509, "type": "PrimitiveStringMultiline", "pos": [ -3238.491355928488, 3467.1146191439493 ], "size": [ 343.59614112612917, 109.43487405985934 ], "flags": {}, "order": 0, "mode": 0, "inputs": [], "outputs": [ { "name": "STRING", "type": "STRING", "links": [ 13631 ] } ], "title": "Prompt (negative)", "properties": { "Node name for S&R": "PrimitiveStringMultiline", "cnr_id": "comfy-core", "ver": "0.25.0" }, "widgets_values": [ "" ], "color": "#322", "bgcolor": "#533" }, { "id": 5530, "type": "MarkdownNote", "pos": [ -921.7990918562209, 3006 ], "size": [ 323, 134 ], "flags": { "collapsed": false }, "order": 1, "mode": 0, "inputs": [], "outputs": [], "title": "Generate - stage 2", "properties": {}, "widgets_values": [ "## Generate - stage 2\n\n**Upscale and re-sampler (3 steps)**\n\nThis subgraph node upscales the result of the first stage by 2 (width & height) and runs another 3 steps of diffusion after adding noise on the input latent. You can adjust the noise seed and the sampler/guider used in this diffusion stage. The original image is used here again for conditioning, if you entered one." ], "color": "#432", "bgcolor": "#653" }, { "id": 5531, "type": "MarkdownNote", "pos": [ -464.2628423791107, 2887 ], "size": [ 406.802722524611, 253 ], "flags": { "collapsed": false }, "order": 2, "mode": 0, "inputs": [], "outputs": [], "title": "Decode", "properties": {}, "widgets_values": [ "## Decode\n\nMake sure to adjust the number of tiles and overlap to fit your hardware.\n(fewer tiles will result in faster execution, but will require more memory).\n\n### Recommended settings\n\n| node settings (pixels) | resolved latent geometry |\n| ------------------------------------------ | ------------------------------- |\n| `512 / 64 / 128 / 32` | 16x16, ov 2 - 16f ov 4 |\n| `768 / 192 / 128 / 32` | 24x24, ov 6 - 16f ov 4 |\n| `1024 / 256 / 128 / 48` | 32x32, ov 8 - 16f, ov 6 |\n| `1536 / 384 / 192 / 48` | 48x48, ov 12 - 24f, ov 6 |\n| `768 / 192 / spatial-only` | 24x24, ov 6 - no temporal split |" ], "color": "#432", "bgcolor": "#653" }, { "id": 5532, "type": "MarkdownNote", "pos": [ -17.46011985449968, 3073 ], "size": [ 523.0556530433919, 88 ], "flags": { "collapsed": false }, "order": 3, "mode": 0, "inputs": [], "outputs": [], "title": "Save video", "properties": {}, "widgets_values": [ "## Save video\n\nThis is your output preview \ud83c\udf89\ud83e\udd73" ], "color": "#432", "bgcolor": "#653" }, { "id": 5527, "type": "MarkdownNote", "pos": [ -3264.713473646006, 2824 ], "size": [ 897.7134736460062, 316 ], "flags": { "collapsed": false }, "order": 4, "mode": 0, "inputs": [], "outputs": [], "title": "Inputs", "properties": {}, "widgets_values": [ "## Inputs\n\nEverything here is optional.\n\n### Prompt\n\nEnter a positive prompt. To rewrite it into a fuller description first, enable\n**enhance positive prompt** on the Input Parameters node below. The negative\nprompt is used as written and is never enhanced.\n\nSupplying an **LTX API key** encodes and enhances the prompt through the API\ninstead of locally, which saves memory. The workflow switches over on its own\nwhenever a key is present - there is nothing to un-bypass.\n\nSee the [prompting guide](https://docs.ltx.io/open-source-model/usage-guides/prompting-guide).\n\n### Image input\n\nCondition the video to open on a still by loading an image and enabling\n**use image input** on the Input Parameters node.\n\n### Reference video\n\nTurns the reference video into a control signal through an **annotator**.\n**Depth** is wired by default; open the Reference Video node to switch to\n**Canny** or **Pose**.\n\nIts width, height, length and frame rate drive the whole generation: the fps\nfeeds both the text conditioning and Preprocess. The union-control **IC-LoRA**\nis loaded in **Load Models**, and the guide frames are injected in\n**Preprocess**, then cropped out after stage 1." ], "color": "#432", "bgcolor": "#653" }, { "id": 5544, "type": "PreviewAny", "pos": [ -2759, 4215.441800056156 ], "size": [ 366, 152.8261854221696 ], "flags": {}, "order": 14, "mode": 0, "inputs": [ { "name": "source", "type": "*", "link": 13778 } ], "outputs": [ { "name": "STRING", "type": "STRING", "links": [] } ], "title": "Effective positive prompt (enhanced if enabled)", "properties": { "Node name for S&R": "PreviewAny" }, "widgets_values": [], "color": "#232", "bgcolor": "#353" }, { "id": 5526, "type": "MarkdownNote", "pos": [ -4027.492001622839, 2448 ], "size": [ 600, 692 ], "flags": { "collapsed": false }, "order": 5, "mode": 0, "inputs": [], "outputs": [], "title": "Model Links", "properties": {}, "widgets_values": [ "## Model Links\n\n**LTX-2.5 Model Weights**\n\nMake sure to click the \"Agree and Access\" button the first time you download.\n\n- [ Distilled model - ltx-2.5-22b-distilled-transformer-bf16.safetensors ](https://huggingface.co/Lightricks/LTX-2.5/blob/main/diffusion_models/ltx-2.5-22b-distilled-transformer-bf16.safetensors)\n\n- [ IC-LoRA Union Control - ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors ](https://huggingface.co/Lightricks/LTX-2.3-22b-IC-LoRA-Union-Control/blob/main/ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors)\n\n- [ Audio VAE - ltx-2.5-audio-vae-bf16.safetensors ](https://huggingface.co/Lightricks/LTX-2.5/blob/main/vae/ltx-2.5-audio-vae-bf16.safetensors)\n\n- Video VAE - one of these:\n - [ Diffusion decoder ltx-2.5-video-vae-bf16.safetensors ](https://huggingface.co/Lightricks/LTX-2.5/blob/main/vae/ltx-2.5-video-vae-bf16.safetensors) - Best quality\n - [ Convolutional decoder - ltx-2.5-video-vae-conv-bf16.safetensors ](https://huggingface.co/Lightricks/LTX-2.5/blob/main/vae/ltx-2.5-video-vae-conv-bf16.safetensors) - Lower memory & faster\n\n- [ Upscaler - ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors ](https://huggingface.co/Lightricks/LTX-2.5/blob/main/latent_upscale_models/ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors)\n\n\n\n**Text Encoder - finetuned for LTX-2.5**\n- [gemma4-12b-with-proj-ltx-2.5-bf16.safetensors](https://huggingface.co/Lightricks/LTX-2.5/blob/main/text_encoders/gemma4-12b-with-proj-ltx-2.5-bf16.safetensors)\n\n**Text Enhancer**\n- [Google Gemma 4 E2B IT](https://huggingface.co/Comfy-Org/gemma-4/blob/main/text_encoders/gemma4_e2b_it_bf16.safetensors)\n\n\n**Model Storage Location**\n\n```\n\ud83d\udcc2 ComfyUI/\n\u251c\u2500\u2500 \ud83d\udcc2 models/\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 text_encoders/\n\u2502 \u2502 \u251c\u2500\u2500 gemma4-12b-with-proj-ltx-2.5-bf16.safetensors\n\u2502 \u2502 \u2514\u2500\u2500 gemma4_e2b_it_bf16.safetensors\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 loras/\n\u2502 \u2502 \u2514\u2500\u2500 ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 diffusion_models/\n\u2502 \u2502 \u2514\u2500\u2500 ltx-2.5-22b-distilled-transformer-bf16.safetensors\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 vae/\n\u2502 \u2502 \u2514\u2500\u2500 ltx-2.5-audio-vae-bf16.safetensors\n\u2502 \u2502 \u2514\u2500\u2500 ltx-2.5-video-vae-conv-bf16.safetensors / ltx-2.5-video-vae-bf16.safetensors\n\u2502 \u251c\u2500\u2500 \ud83d\udcc2 latent_upscale_models/\n\u2502 \u2514\u2500\u2500 ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors\n```\n\n## Report Issues\nTo report any issues when running this workflow, [go to GitHub](https://github.com/Lightricks/ComfyUI-LTXVideo/issues)\n" ], "color": "#432", "bgcolor": "#653" }, { "id": 5529, "type": "MarkdownNote", "pos": [ -1707.2211820415482, 3006 ], "size": [ 305.4220901853274, 134 ], "flags": { "collapsed": false }, "order": 6, "mode": 0, "inputs": [], "outputs": [], "title": "Generate - stage 1", "properties": {}, "widgets_values": [ "## Generate - stage 1\n\n**Sampler - Distilled (8 steps)**\n\nThis is the flow for the first stage. It takes the distilled ltx-2.5 model with the union ic-lora LoRA applied on top of it and runs the diffusion in 8 steps. You can change the noise seed, the guider cfg (used for both video and audio) and select the sampler. " ], "color": "#432", "bgcolor": "#653" }, { "id": 4852, "type": "SaveVideo", "pos": [ -17.46011985449968, 3230 ], "size": [ 523.0556530433919, 106 ], "flags": {}, "order": 20, "mode": 0, "inputs": [ { "name": "video", "type": "VIDEO", "link": 13675 } ], "outputs": [ { "name": "video", "type": "VIDEO", "links": [] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.14.1" }, "widgets_values": [ "output", "auto", "auto" ] }, { "id": 5001, "type": "LoadVideo", "pos": [ -3238.713473646006, 3998.5339822721235 ], "size": [ 344, 300 ], "flags": {}, "order": 7, "mode": 0, "inputs": [], "outputs": [ { "name": "VIDEO", "type": "VIDEO", "links": [ 13758 ] } ], "properties": { "Node name for S&R": "LoadVideo", "cnr_id": "comfy-core", "ver": "0.10.0" }, "widgets_values": [ "", "image" ], "color": "#232", "bgcolor": "#353" }, { "id": 5508, "type": "PrimitiveStringMultiline", "pos": [ -3238.491355928488, 3230 ], "size": [ 343.59614112612917, 197.1146191439493 ], "flags": {}, "order": 8, "mode": 0, "inputs": [], "outputs": [ { "name": "STRING", "type": "STRING", "links": [ 13630 ] } ], "title": "Prompt (positive)", "properties": { "Node name for S&R": "PrimitiveStringMultiline", "cnr_id": "comfy-core", "ver": "0.25.0" }, "widgets_values": [ "" ], "color": "#232", "bgcolor": "#353" }, { "id": 5014, "type": "c28230e9-b195-4ec2-9679-39e1e920f733", "pos": [ -2759, 3456 ], "size": [ 366, 683.441800056156 ], "flags": {}, "order": 13, "mode": 0, "inputs": [ { "label": "text encoder clip", "name": "clip", "type": "CLIP", "link": 13466 }, { "label": "text enhancer clip", "name": "clip_1", "type": "CLIP", "link": 13714 }, { "label": "image", "name": "input", "type": "IMAGE,MASK", "link": 13468 }, { "label": "use image input", "name": "value_3", "type": "BOOLEAN", "widget": { "name": "value_3" }, "link": null }, { "label": "Positive prompt", "name": "value_2", "type": "STRING", "widget": { "name": "value_2" }, "link": 13630 }, { "label": "Enhance positive prompt", "name": "cond", "type": "BOOLEAN", "widget": { "name": "cond" }, "link": null }, { "label": "Negative prompt", "name": "text", "type": "STRING", "widget": { "name": "text" }, "link": 13631 }, { "label": "enhancer_seed", "name": "seed", "type": "INT", "widget": { "name": "seed" }, "link": null }, { "label": "LTX API key", "name": "value_4", "type": "STRING", "widget": { "name": "value_4" }, "link": null }, { "label": "ltx model ckpt path", "name": "ckpt_name", "type": "COMBO", "widget": { "name": "ckpt_name" }, "link": 13780 }, { "label": "fps", "name": "value", "type": "FLOAT", "widget": { "name": "value" }, "link": 13779 } ], "outputs": [ { "name": "bypass_i2v", "type": "BOOLEAN", "links": [ 13663, 13765 ] }, { "name": "resized image", "type": "IMAGE", "links": [ 13662, 13764 ] }, { "name": "effective_prompt", "type": "STRING", "links": [ 13778 ] }, { "name": "positive_encoded", "type": "CONDITIONING", "links": [ 13760 ] }, { "name": "negative_encoded", "type": "CONDITIONING", "links": [ 13761 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.25.0", "previewExposures": [] }, "widgets_values": [ true, "", false, "", 457289196, "", "ltx-2.3-22b-dev.safetensors", 24 ] }, { "id": 5549, "type": "LTXVCropGuides", "pos": [ -1346.3626358656188, 3385.632421923454 ], "size": [ 187.5, 100.83333333333334 ], "flags": {}, "order": 17, "mode": 0, "inputs": [ { "name": "positive", "type": "CONDITIONING", "link": 13776 }, { "name": "negative", "type": "CONDITIONING", "link": 13777 }, { "name": "latent", "type": "LATENT", "link": 13748 } ], "outputs": [ { "name": "positive", "type": "CONDITIONING", "links": [ 13750 ] }, { "name": "negative", "type": "CONDITIONING", "links": [ 13751 ] }, { "name": "latent", "type": "LATENT", "links": [ 13755 ] } ], "properties": { "Node name for S&R": "LTXVCropGuides", "cnr_id": "comfy-core", "ver": "0.3.75" }, "widgets_values": [] }, { "id": 9002, "type": "0561a6cf-3c6a-43fe-8220-794fece80c7c", "pos": [ -2180, 3230 ], "size": [ 300, 360 ], "flags": {}, "order": 15, "mode": 0, "inputs": [ { "name": "positive", "type": "CONDITIONING", "link": 13760 }, { "name": "negative", "type": "CONDITIONING", "link": 13761 }, { "name": "vae", "type": "VAE", "link": 13762 }, { "name": "audio_vae", "type": "VAE", "link": 13763 }, { "name": "image", "type": "IMAGE", "link": 13764 }, { "name": "bypass", "type": "BOOLEAN", "widget": { "name": "bypass" }, "link": 13765 }, { "name": "latent_downscale_factor", "type": "FLOAT", "widget": { "name": "latent_downscale_factor" }, "link": 13766 }, { "name": "guide_image", "type": "IMAGE", "link": 13767 }, { "name": "width", "type": "INT", "widget": { "name": "width" }, "link": 13768 }, { "name": "height", "type": "INT", "widget": { "name": "height" }, "link": 13769 }, { "name": "length", "type": "INT", "widget": { "name": "length" }, "link": 13770 }, { "name": "fps", "type": "FLOAT", "widget": { "name": "fps" }, "link": 13771 } ], "outputs": [ { "name": "positive", "type": "CONDITIONING", "links": [ 13773, 13776 ] }, { "name": "negative", "type": "CONDITIONING", "links": [ 13774, 13777 ] }, { "name": "latent", "type": "LATENT", "links": [ 13775 ] } ], "properties": { "previewExposures": [] }, "widgets_values": [ false, 1, 960, 544, 121, 24 ] }, { "id": 9003, "type": "MarkdownNote", "pos": [ -2180, 2982 ], "size": [ 300, 158 ], "flags": {}, "order": 9, "mode": 0, "inputs": [], "outputs": [], "title": "Preprocess", "properties": {}, "widgets_values": [ "## Preprocess\n\nBuilds the empty audio-video latent at the **reference video's** size and length, conditions on the optional start image, sets the conditioning frame-rate from the reference fps, and injects the reference **guide frames** via the IC-LoRA (`LTXAddVideoICLoRAGuide`).\n\nThe guide frames are cropped out after stage 1 (`LTXVCropGuides`) so stage 2 upscales only the generated video." ], "color": "#432", "bgcolor": "#653" }, { "id": 5548, "type": "8e57a082-fe75-4924-b7d3-ab885d39e8df", "pos": [ -2759, 3230 ], "size": [ 366, 150 ], "flags": {}, "order": 12, "mode": 0, "inputs": [ { "name": "video", "type": "VIDEO", "link": 13758 }, { "name": "latent_downscale_factor", "type": "FLOAT", "link": 13759 } ], "outputs": [ { "name": "image", "type": "IMAGE", "links": [ 13767 ] }, { "name": "width", "type": "INT", "links": [ 13768 ] }, { "name": "height", "type": "INT", "links": [ 13769 ] }, { "name": "length", "type": "INT", "links": [ 13770 ] }, { "name": "fps", "type": "FLOAT", "links": [ 13771, 13772, 13779 ] } ], "properties": { "previewExposures": [] } }, { "id": 2004, "type": "LoadImage", "pos": [ -3238.491355928488, 3616.5494932038087 ], "size": [ 343.59614112612917, 326 ], "flags": {}, "order": 10, "mode": 0, "inputs": [], "outputs": [ { "name": "IMAGE", "type": "IMAGE", "links": [ 13468 ] }, { "name": "MASK", "type": "MASK", "links": [] } ], "properties": { "Node name for S&R": "LoadImage", "cnr_id": "comfy-core", "ver": "0.3.56" }, "widgets_values": [ "", "image" ], "color": "#232", "bgcolor": "#353" }, { "id": 5518, "type": "bee43e38-9234-4e41-86ff-63874164f482", "pos": [ -464.2628423791107, 3230 ], "size": [ 306.802722524611, 298.27679026401256 ], "flags": {}, "order": 19, "mode": 0, "inputs": [ { "name": "vae", "type": "VAE", "link": 13670 }, { "label": "video_latent", "name": "latents", "type": "LATENT", "link": 13757 }, { "label": "audio_latent", "name": "samples", "type": "LATENT", "link": 13756 }, { "name": "audio_vae", "type": "VAE", "link": 13673 }, { "name": "fps", "type": "FLOAT", "widget": { "name": "fps" }, "link": 13772 } ], "outputs": [ { "name": "VIDEO", "type": "VIDEO", "links": [ 13675 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.25.0", "previewExposures": [] }, "widgets_values": [ 30, 8, 512, 64, 128, 32 ] }, { "id": 5516, "type": "f9337bd7-ca7a-4a59-99f1-65b664bed7e7", "pos": [ -1707.2211820415482, 3230 ], "size": [ 305.4220901853274, 261.0261211902389 ], "flags": {}, "order": 16, "mode": 0, "inputs": [ { "name": "model", "type": "MODEL", "link": 13653 }, { "name": "positive", "type": "CONDITIONING", "link": 13773 }, { "name": "negative", "type": "CONDITIONING", "link": 13774 }, { "name": "latent_image", "type": "LATENT", "link": 13775 }, { "label": "noise seed", "name": "noise_seed", "type": "INT", "widget": { "name": "noise_seed" }, "link": null }, { "label": "guider cfg", "name": "cfg", "type": "FLOAT", "widget": { "name": "cfg" }, "link": null } ], "outputs": [ { "name": "video_latent", "type": "LATENT", "links": [ 13748 ] }, { "name": "audio_latent", "type": "LATENT", "links": [ 13733 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.25.0", "previewExposures": [] }, "widgets_values": [ 42, 1, "euler_ancestral" ] }, { "id": 5004, "type": "a1106ab2-2d57-4b7c-91af-f172c971b3af", "pos": [ -4027.492001622839, 3226.8212377387586 ], "size": [ 575.5086440715122, 342 ], "flags": { "collapsed": false }, "order": 11, "mode": 0, "inputs": [ { "label": "audio_vae", "name": "audio_vae", "type": "COMBO", "widget": { "name": "audio_vae" }, "link": null }, { "label": "video_vae", "name": "video_vae", "type": "COMBO", "widget": { "name": "video_vae" }, "link": null }, { "label": "ltx_2.5_model_checkpoint", "name": "ltx_2.5_model_checkpoint", "type": "COMBO", "widget": { "name": "ltx_2.5_model_checkpoint" }, "link": null }, { "label": "spacial_latent_upscaler_model", "name": "spacial_latent_upscaler_model", "type": "COMBO", "widget": { "name": "spacial_latent_upscaler_model" }, "link": null }, { "label": "gemma4_e2b_enhancer", "name": "gemma4_e2b_enhancer", "type": "COMBO", "widget": { "name": "gemma4_e2b_enhancer" }, "link": null }, { "label": "gemma4_12b_encoder", "name": "gemma4_12b_encoder", "type": "COMBO", "widget": { "name": "gemma4_12b_encoder" }, "link": null }, { "label": "ic_lora", "name": "ic_lora", "type": "COMBO", "widget": { "name": "ic_lora" }, "link": null } ], "outputs": [ { "name": "Audio VAE", "type": "VAE", "links": [ 13673, 13763 ] }, { "name": "VAE", "type": "VAE", "links": [ 13661, 13670, 13762 ] }, 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