Video frames

video.frames

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Selected signal results for external comparison. Field statuses, controls and exact values are retained.

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Source

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// Test source pending.

Definition

Per-codec sampled decoded planes and format/configuration, with independent orientation, crop and layout controls.

Find it in the repository

Collector source: core/signals/video/frames.ts
Export: measurementModule · Signal factory
Field definitions: core/definitions/video/frames.ts
Capture membership: Product capture · common/capture/product.ts
Page registration: app/signals/registry.ts
Field projection: core/results/measurement.ts

Execution contract

Signal: video.frames
Collector: video.frames
API / surface: core/signals/video/frames.ts
Timeout: 3000 ms
Companion signals: None
Fixture inputs: core/fixtures/video/frames/quadrants-vp8.ivfcore/fixtures/video/frames/quadrants-vp9.ivf

input-a1d65b7e4bdddb86 · sha256:a1d65b7e4bdddb86427a117254056d60acea0115646a5488f7866722878a657f
input-5de96153ec5e9772 · sha256:5de96153ec5e97727e09e2484543cc76a2ba8033c5129b023fb36505023ab23a

Exact request inputs

[
  {
    "key": "video.frames.vp8",
    "inputs": {
      "vp8": {
        "config": {
          "codec": "vp8",
          "codedWidth": 96,
          "codedHeight": 64,
          "hardwareAcceleration": "no-preference",
          "optimizeForLatency": true,
          "colorSpace": {
            "primaries": "bt709",
            "transfer": "bt709",
            "matrix": "bt709",
            "fullRange": false
          }
        },
        "chunks": [
          {
            "offset": 44,
            "size": 51,
            "timestamp": 0,
            "duration": 200000,
            "type": "key"
          },
          {
            "offset": 107,
            "size": 51,
            "timestamp": 200000,
            "duration": 200000,
            "type": "key"
          }
        ],
        "sha256": "a1d65b7e4bdddb86427a117254056d60acea0115646a5488f7866722878a657f",
        "fixtureSha256": "a1d65b7e4bdddb86427a117254056d60acea0115646a5488f7866722878a657f"
      }
    },
    "controls": {
      "vp8": [
        {
          "relationshipId": "decode-shape-timestamps",
          "class": "required",
          "preconditions": [
            "all chunks decoded and flushed"
          ]
        },
        {
          "relationshipId": "independent-plane-reference",
          "class": "required",
          "preconditions": [
            "actual I420 format",
            "owned interior plane coordinates"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.vp9",
    "inputs": {
      "vp9": {
        "config": {
          "codec": "vp09.00.10.08",
          "codedWidth": 96,
          "codedHeight": 64,
          "hardwareAcceleration": "no-preference",
          "optimizeForLatency": true,
          "colorSpace": {
            "primaries": "bt709",
            "transfer": "bt709",
            "matrix": "bt709",
            "fullRange": false
          }
        },
        "chunks": [
          {
            "offset": 44,
            "size": 50,
            "timestamp": 0,
            "duration": 200000,
            "type": "key"
          },
          {
            "offset": 106,
            "size": 49,
            "timestamp": 200000,
            "duration": 200000,
            "type": "key"
          }
        ],
        "sha256": "5de96153ec5e97727e09e2484543cc76a2ba8033c5129b023fb36505023ab23a",
        "fixtureSha256": "5de96153ec5e97727e09e2484543cc76a2ba8033c5129b023fb36505023ab23a"
      }
    },
    "controls": {
      "vp9": [
        {
          "relationshipId": "decode-shape-timestamps",
          "class": "required",
          "preconditions": [
            "all chunks decoded and flushed"
          ]
        },
        {
          "relationshipId": "independent-plane-reference",
          "class": "required",
          "preconditions": [
            "actual I420 format",
            "owned interior plane coordinates"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.frame-base",
    "inputs": {
      "frame-base": {
        "id": "frame-base",
        "rotation": 0,
        "flip": false,
        "composed": false,
        "crop": false,
        "order": [
          0,
          1,
          2,
          3
        ]
      }
    },
    "controls": {
      "frame-base": [
        {
          "relationshipId": "storage-corners",
          "class": "required",
          "preconditions": [
            "RGBA copyTo",
            "crop-relative returned stride"
          ]
        },
        {
          "relationshipId": "display-corners",
          "class": "required",
          "preconditions": [
            "opaque sRGB",
            "nearest unscaled rendering",
            "rotate clockwise then flip horizontally"
          ]
        },
        {
          "relationshipId": "orientation-composition",
          "class": "required",
          "preconditions": [
            "orientation readback available"
          ]
        },
        {
          "relationshipId": "padded-layout",
          "class": "required",
          "preconditions": [
            "padded copy requested"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.frame-quarter-turn",
    "inputs": {
      "frame-quarter-turn": {
        "id": "frame-quarter-turn",
        "rotation": 90,
        "flip": false,
        "composed": false,
        "crop": false,
        "order": [
          2,
          0,
          3,
          1
        ]
      }
    },
    "controls": {
      "frame-quarter-turn": [
        {
          "relationshipId": "storage-corners",
          "class": "required",
          "preconditions": [
            "RGBA copyTo",
            "crop-relative returned stride"
          ]
        },
        {
          "relationshipId": "display-corners",
          "class": "required",
          "preconditions": [
            "opaque sRGB",
            "nearest unscaled rendering",
            "rotate clockwise then flip horizontally"
          ]
        },
        {
          "relationshipId": "orientation-composition",
          "class": "required",
          "preconditions": [
            "orientation readback available"
          ]
        },
        {
          "relationshipId": "padded-layout",
          "class": "required",
          "preconditions": [
            "padded copy requested"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.frame-turn-flip",
    "inputs": {
      "frame-turn-flip": {
        "id": "frame-turn-flip",
        "rotation": 90,
        "flip": true,
        "composed": false,
        "crop": false,
        "order": [
          0,
          2,
          1,
          3
        ]
      }
    },
    "controls": {
      "frame-turn-flip": [
        {
          "relationshipId": "storage-corners",
          "class": "required",
          "preconditions": [
            "RGBA copyTo",
            "crop-relative returned stride"
          ]
        },
        {
          "relationshipId": "display-corners",
          "class": "required",
          "preconditions": [
            "opaque sRGB",
            "nearest unscaled rendering",
            "rotate clockwise then flip horizontally"
          ]
        },
        {
          "relationshipId": "orientation-composition",
          "class": "required",
          "preconditions": [
            "orientation readback available"
          ]
        },
        {
          "relationshipId": "padded-layout",
          "class": "required",
          "preconditions": [
            "padded copy requested"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.frame-composed",
    "inputs": {
      "frame-composed": {
        "id": "frame-composed",
        "rotation": 90,
        "flip": true,
        "composed": true,
        "crop": false,
        "order": [
          0,
          1,
          2,
          3
        ]
      }
    },
    "controls": {
      "frame-composed": [
        {
          "relationshipId": "storage-corners",
          "class": "required",
          "preconditions": [
            "RGBA copyTo",
            "crop-relative returned stride"
          ]
        },
        {
          "relationshipId": "display-corners",
          "class": "required",
          "preconditions": [
            "opaque sRGB",
            "nearest unscaled rendering",
            "rotate clockwise then flip horizontally"
          ]
        },
        {
          "relationshipId": "orientation-composition",
          "class": "required",
          "preconditions": [
            "orientation readback available"
          ]
        },
        {
          "relationshipId": "padded-layout",
          "class": "required",
          "preconditions": [
            "padded copy requested"
          ]
        }
      ]
    }
  },
  {
    "key": "video.frames.frame-crop-stride",
    "inputs": {
      "frame-crop-stride": {
        "id": "frame-crop-stride",
        "rotation": 0,
        "flip": false,
        "composed": false,
        "crop": true,
        "order": [
          0,
          1,
          2,
          3
        ]
      }
    },
    "controls": {
      "frame-crop-stride": [
        {
          "relationshipId": "storage-corners",
          "class": "required",
          "preconditions": [
            "RGBA copyTo",
            "crop-relative returned stride"
          ]
        },
        {
          "relationshipId": "display-corners",
          "class": "required",
          "preconditions": [
            "opaque sRGB",
            "nearest unscaled rendering",
            "rotate clockwise then flip horizontally"
          ]
        },
        {
          "relationshipId": "orientation-composition",
          "class": "required",
          "preconditions": [
            "orientation readback available"
          ]
        },
        {
          "relationshipId": "padded-layout",
          "class": "required",
          "preconditions": [
            "padded copy requested"
          ]
        }
      ]
    }
  }
]

One collector runs per invocation. Results and JSON select this signal’s fields; any companions execute in the same collector.

Generated source manifest lists runtime files, fixture URLs and content digests for this build. The Source tab provides a copyable console sample.

Run and edit locally

From the repository root, start the Astro app, then open /signals/video.frames. Edit the collector source and reload the page to load its new build.

pnpm run dev:web

In a browser module served by this repository’s Vite graph:

import { createCollector } from "/core/collect"
import { measurementModule } from "/core/signals/video/frames"
import asset0 from "/core/fixtures/video/frames/quadrants-vp8.ivf?url"
import asset1 from "/core/fixtures/video/frames/quadrants-vp9.ivf?url"

const signal = measurementModule({ "vp8": asset0, "vp9": asset1 })
const collector = createCollector()
const suite = { signals: [signal] }
const result = await collector.collect(suite)

Reuse the collector owner for repeated calls so collection can enforce cleanup. This returns the collector’s raw result; app/signals/projection.ts selects the retained fields shown on this page.

rg -n 'measurementModule' core app tests
pnpm run check
pnpm run test tests/unit/app/focused-projection.test.ts