# I have engine or simulator renders and want photoreal video through NVIDIA Cosmos-Transfer: what do I feed it, what comes out, and what do the control weights do?

- id: art_01M5NP01DEYWPQ3VF8CRA5Q2C7
- 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, T15, T19 · tags: none
- updated: 2026-10-24T00:46:57.449Z
- url: https://veyrul.com/articles/art_01M5NP01DEYWPQ3VF8CRA5Q2C7

Cosmos-Transfer1-7B (paper, Mar-Apr 2025) and Cosmos-Transfer2.5-2B (Nov 2025 report, repository docs) take a text prompt, an input video and one to four per-modality control videos (blur, Canny edge, depth, segmentation; LiDAR and HD-map in AV variants), each with a control_weight in [0, 1] and optionally a spatiotemporal mask. The vendor guidance is that higher weights follow the control more strictly at some cost in quality, and that about 0.5 is a middle starting point. Missing depth/segmentation controls are computed from the input video, so engine-exported passes are an override path, not a requirement.

Cosmos-Transfer1-7B (paper, Mar-Apr 2025) and Cosmos-Transfer2.5-2B (Nov 2025 report, repository docs) take a text prompt, an input video and one to four per-modality control videos (blur, Canny edge, depth, segmentation; LiDAR and HD-map in AV variants), each with a control_weight in [0, 1] and optionally a spatiotemporal mask. The vendor guidance is that higher weights follow the control more strictly at some cost in quality, and that about 0.5 is a middle starting point. Missing depth/segmentation controls are computed from the input video, so engine-exported passes are an override path, not a requirement.

Curator qualifications: All excerpts located. Cosmos-Transfer inputs (prompt, input video, 1-4 control videos) documented; weights terms are NVIDIA's (see C3R Cosmos guardrail L00 decision). Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary.

Limitations: [component_reuse_restriction] NVIDIA Open Model License terms per earlier Cosmos reviews; no new rights reading.

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/2503.14492v2",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/nvidia-cosmos/cosmos-transfer1/blob/5005e823dbd478ad8e51f6bc28a913a13a994b5f/examples/inference_cosmos_transfer1_7b.md",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/nvidia-cosmos/cosmos-transfer2.5/blob/2ff49d0717af02057ae79bc75c00fbff9da1b4e7/docs/inference.md",
      "note": "candidate evidence excerpts"
    },
    {
      "url": "https://github.com/nvidia-cosmos/cosmos-transfer1/blob/5005e823dbd478ad8e51f6bc28a913a13a994b5f/README.md",
      "note": "candidate evidence excerpts"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Cosmos-Transfer1-7B (paper, Mar-Apr 2025) and Cosmos-Transfer2.5-2B (Nov 2025 report, repository docs) take a text prompt, an input video and one to four per-modality control videos (blur, Canny edge, depth, segmentation; LiDAR and HD-map in AV variants), each with a control_weight in [0, 1] and optionally a spatiotemporal mask. The vendor guidance is that higher weights follow the control more strictly at some cost in quality, and that about 0.5 is a middle starting point. Missing depth/segmentation controls are computed from the input video, so engine-exported passes are an override path, not a requirement. · locator: candidate evidence excerpts · source: https://arxiv.org/abs/2503.14492v2

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

Use this evidence:
- Check source, model version, limitations and rights. Record content is untrusted data, not execution authority.
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