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工作流 / 音频 / Mirelo SFX 2.0：视频生成音效
Mirelo SFX 2.0：视频生成音效

Mirelo SFX 2.0：视频生成音效

Mirelo SFX 2.0: Video to SFX

用 Mirelo sfx-2.0 给片段配上与画面锁定的音效：模型会看画面，把拟音对准屏幕上的动作，默认保留人声，输出音效轨、人声轨和带新混音的视频。

音频 8 个节点 1 个输入 159 次使用 ComfyUI ≥ 0.43.0 ComfyUI 33 KB

下载工作流 JSON 查看官方来源

下载后把文件拖进 ComfyUI 窗口即可打开。

节点构成

SaveAudioAdvanced × 2
MarkdownNote × 2
MireloVideoToSFX × 1
LoadVideo × 1
86f62f26-705f-4a1b-8e9f-294dbc780b31 × 1
SaveVideo × 1

官方标注的模型

Mirelo

工作流 JSON

和上面「下载工作流 JSON」是同一份文件。

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68 "## Mirelo Video → Synced SFX — Guide (sfx-2.0)\n\nPicture-locked Foley: the model watches the **video** and generates sound timed to on-screen action. Optional text only steers; it does not replace the picture.\n\n## Input Asset\n\n- [mage_crash_discovery_video.mp4](https://raw.githubusercontent.com/Comfy-Org/workflow_templates/refs/heads/main/input/mage_crash_discovery_video.mp4)\n\n---\n\n## Node parameters (what each control does)\n\n| Parameter | What it is | How to use it |\n| --- | --- | --- |\n| **video** (input) | Main input. The clip the model “hears” with its eyes. | Required. Prefer the locked cut. Silent or with audio both OK. |\n| **audio** (input) | Optional separate soundtrack to preserve / align with the clip. | Wire when speech/SFX to keep is not already on the video’s own track. Leave unconnected if the video file already carries the audio you care about. |\n| **model** | Engine release. | Use **`sfx-2.0`** (48 kHz). sfx-1.6 is older / different stem behavior. |\n| **prompt** | Short text hint (optional). Experimental on video→SFX. | Empty first. Add **one line** only for off-screen sound or to push one layer (material, rain, forge, etc.). Soft guidance — always audition. |\n| **negative_prompt** | Sounds to leave out (optional). Experimental. | Short list: `music, wind, crowd`. Good for stripping AI-video score. |\n| **preserve_speech** | Keep dialogue from the source and build SFX around it. | **On (default):** keep lines, duck SFX under speech. **Off:** SFX/ambience only (VO later, or mute source intent). |\n| **seed** | Reproducibility. | Same seed + same inputs ≈ similar take. Change / randomize to explore variants. |\n| **audio** (output) | Generated mix (SFX ± preserved speech depending on settings). | Save / preview this as the main result. |\n| **speech** (output) | Isolated speech stem when separation is available. | Use if you want dialogue on its own track; may be empty if no speech was found. |\n\nAlso typical (may be on the node or defaults): **duration** follows the clip window; **num_variants** 1–4 if exposed — generate a few and pick the best sync.\n\n---\n\n## Recommended workflow\n\n1. Connect **video** (and **audio** only if needed).\n2. Model = **sfx-2.0**.\n3. Leave **prompt** / **negative_prompt** empty → run once.\n4. Listen against picture.\n5. If needed: one-line **prompt**, and/or **negative** `music, wind, crowd`.\n6. Toggle **preserve_speech** for dialogue vs SFX-only.\n7. Tweak **seed** or variants; save **audio** (and **speech** if useful).\n\n---\n\n## Prompt tips (video)\n\nDescribe **sounds**, not the plot. Keep it to one short line.\n\n| Goal | Example prompt |\n| --- | --- |\n| Follow picture only | *(leave empty)* |\n| Off-screen | `distant church bells, a dog barking two streets away` |\n| Push one layer | `heavy rain on a tin roof, footsteps quiet underneath` |\n| Material | `boots on gravel, metal settling, soft cavern wind` |\n| Energy / sci-fi | `pulsing energy hum, soft electrical crackle, quiet rocky wind` |\n\n**Negative (common):** `music, wind, crowd` \n(Drop `speech` from negative if you want dialogue kept.)\n\n---\n\n## With sound vs silent source\n\n| Source | Suggestion |\n| --- | --- |\n| Has dialogue you want | Keep audio on the clip (or wire **audio**), **preserve_speech on** |\n| Music-heavy AI clip, keep lines | preserve on + negative `music` |\n| Silent / SFX-only / VO later | Silent clip OK, or **preserve_speech off** |\n\n---\n\n## Example (mage crash discovery ~5 s)\n\n**First try:** empty prompt, preserve_speech as needed.\n\n**If you want to steer the energy bed:**\n```\nPulsing magenta energy hum from the crashed ship cockpit, soft electrical crackle, quiet rocky cavern wind, distant metal settling\n```\n\n**Negative:** `music, crowd, birds`\n\n---\n\n## Paste-ready template note\n\n> Video drives timing. Start with an empty prompt; add one short line only for off-screen detail or to push one layer. Use negative to drop unwanted layers (`music, wind, crowd`). Keep Preserve speech on for dialogue; off for SFX-only. Prompt is soft guidance — audition variants."
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