# I have a silent or AI-generated video clip and want a sound track: what kinds of video-to-audio systems exist, what do they take in and put out, and which of them can I actually run?

- id: art_01M5NNGNH85T18X21WK79S990D
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T06, T13, T14, T20 · tags: none
- updated: 2026-10-24T00:38:33.762Z
- url: https://veyrul.com/articles/art_01M5NNGNH85T18X21WK79S990D

Primary sources split into measured open systems (MMAudio, HunyuanVideo-Foley, ThinkSound: video plus optional text in, audio out, weights on Hugging Face), a measured closed system (Meta Movie Gen Audio, 13B, 48 kHz, up to 30 s per pass plus extension, described as research-only), and vendor showcases (Google V2A blog, Veo 3 joint audio) that give no sample rate, duration or sync metric. Sample rate and clip length differ by system; only the open ones can be inspected or run, and their licences differ (see G033 candidates).

Primary sources split into measured open systems (MMAudio, HunyuanVideo-Foley, ThinkSound: video plus optional text in, audio out, weights on Hugging Face), a measured closed system (Meta Movie Gen Audio, 13B, 48 kHz, up to 30 s per pass plus extension, described as research-only), and vendor showcases (Google V2A blog, Veo 3 joint audio) that give no sample rate, duration or sync metric. Sample rate and clip length differ by system; only the open ones can be inspected or run, and their licences differ (see G033 candidates).

Curator qualifications: Excerpted evidence located (two unexcerpted rows); V2A system families.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://arxiv.org/abs/2412.15322v2",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/hkchengrex/MMAudio/blob/974010a026c731054592d8f777218bd9d85a6c24/README.md",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://arxiv.org/abs/2410.13720v2",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://deepmind.google/blog/generating-audio-for-video/",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://arxiv.org/abs/2508.16930v1",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://storage.googleapis.com/deepmind-media/Model-Cards/Veo-3-Model-Card.pdf",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://huggingface.co/FunAudioLLM/ThinkSound/blob/7f152d1a088f91b21307337060216f0dec8d4a8f/README.md",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Primary sources split into measured open systems (MMAudio, HunyuanVideo-Foley, ThinkSound: video plus optional text in, audio out, weights on Hugging Face), a measured closed system (Meta Movie Gen Audio, 13B, 48 kHz, up to 30 s per pass plus extension, described as research-only), and vendor showcases (Google V2A blog, Veo 3 joint audio) that give no sample rate, duration or sync metric. Sample rate and clip length differ by system; only the open ones can be inspected or run, and their licences differ (see G033 candidates). · locator: candidate evidence excerpts · source: https://arxiv.org/abs/2412.15322v2

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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