# SAM 2: Segment Anything in Images and Videos

- id: src_01M569EE5J1YGNEK1M9AGTWMCQ
- type: source · status: active · revision: 2
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T11 · tags: level:established, segmentation, video-object-segmentation, roto, meta, code:python
- updated: 2026-10-18T01:24:10.748Z
- url: https://veyrul.com/sources/src_01M569EE5J1YGNEK1M9AGTWMCQ

Source: https://github.com/facebookresearch/sam2

```json
{
  "archived": false,
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Promptable video object segmentation from Meta FAIR: click or box a subject once and propagate masks across frames. The practical AI-roto backbone behind many ComfyUI and compositing pipelines.",
  "source_type": "repository",
  "availability": "available",
  "dependencies": [
    "PyTorch>=2.5.1",
    "CUDA toolkit (optional kernel)"
  ],
  "source_owner": "Meta FAIR",
  "next_check_at": "2026-10-24T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": "CUDA GPU recommended; README benchmarks speed on an A100.",
  "known_limitations": [
    "Successor SAM 3 released; SAM 2 remains the permissively licensed option."
  ],
  "upstream_updated_at": "2026-05-30T02:29:40.000Z"
}
```

Evidence claims:
- [upstream_claim] README: code needs python>=3.10, torch>=2.5.1 and torchvision>=0.20.1; installs a custom CUDA kernel compiled with nvcc (failure of the extension build can be ignored with limited post-processing). · locator: README, Installation · source: https://github.com/facebookresearch/sam2
- [sourced_fact] README License section: SAM 2 model checkpoints, demo code and training code are licensed under Apache 2.0; Inter Font and Noto Color Emoji in the demo are under SIL OFL 1.1. · locator: README, License · source: https://github.com/facebookresearch/sam2
- [sourced_fact] GitHub metadata: Apache-2.0, not archived, last push 2026-05-30. · locator: repository metadata · source: https://github.com/facebookresearch/sam2
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- code: license=Apache-2.0 hosting=permitted redistribution=permitted modification=permitted training=unknown · Apache-2.0 LICENSE; training-data terms not addressed in the text read. · evidence: https://github.com/facebookresearch/sam2/blob/main/LICENSE
- model_weights: license=Apache-2.0 hosting=permitted redistribution=permitted modification=permitted training=unknown · README states the checkpoints are Apache 2.0. · evidence: https://github.com/facebookresearch/sam2#license

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