Decoder response

video.decoder-response

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

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// Test source pending.

Definition

Per-size and requested-preference decode correctness, sampled frames and completion response; requested preference is not observed acceleration.

Find it in the repository

Collector source: core/signals/video/decoder-response.ts
Export: measurementModule · Signal factory
Field definitions: core/definitions/video/decoder-response.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.decoder-response
Collector: video.decoder-response
API / surface: core/signals/video/decoder-response.ts
Timeout: 5000 ms
Companion signals: None
Fixture inputs: core/fixtures/video/decoder-response/response-160x96-vp8.ivfcore/fixtures/video/decoder-response/response-1280x720-vp8.ivf

input-4d1b738bb6f97f53 · sha256:4d1b738bb6f97f5348333de8611affa34cfb34f64e283fc35b41aab6036d7801
input-e09b844ef3def1f1 · sha256:e09b844ef3def1f1fb1504f90d754d5c3582daf8763f2230414e5159120233a7

Exact request inputs

[
  {
    "key": "video.decoder-response.160x96-vp8-prefer-hardware",
    "inputs": {
      "160x96-vp8-prefer-hardware": {
        "config": {
          "codec": "vp8",
          "codedWidth": 160,
          "codedHeight": 96,
          "optimizeForLatency": true
        },
        "preference": "prefer-hardware",
        "fixtureSha256": "4d1b738bb6f97f5348333de8611affa34cfb34f64e283fc35b41aab6036d7801"
      }
    },
    "controls": {}
  },
  {
    "key": "video.decoder-response.160x96-vp8-prefer-software",
    "inputs": {
      "160x96-vp8-prefer-software": {
        "config": {
          "codec": "vp8",
          "codedWidth": 160,
          "codedHeight": 96,
          "optimizeForLatency": true
        },
        "preference": "prefer-software",
        "fixtureSha256": "4d1b738bb6f97f5348333de8611affa34cfb34f64e283fc35b41aab6036d7801"
      }
    },
    "controls": {
      "160x96-vp8-prefer-software": [
        {
          "relationshipId": "decoded-count-and-timestamps",
          "class": "required",
          "preconditions": [
            "eight owned key frames",
            "flush completed"
          ]
        },
        {
          "relationshipId": "independent-i420-samples",
          "class": "required",
          "preconditions": [
            "returned native I420 format",
            "FFmpeg native decoder reference"
          ]
        }
      ]
    }
  },
  {
    "key": "video.decoder-response.160x96-vp8-no-preference",
    "inputs": {
      "160x96-vp8-no-preference": {
        "config": {
          "codec": "vp8",
          "codedWidth": 160,
          "codedHeight": 96,
          "optimizeForLatency": true
        },
        "preference": "no-preference",
        "fixtureSha256": "4d1b738bb6f97f5348333de8611affa34cfb34f64e283fc35b41aab6036d7801"
      }
    },
    "controls": {
      "160x96-vp8-no-preference": [
        {
          "relationshipId": "decoded-count-and-timestamps",
          "class": "required",
          "preconditions": [
            "eight owned key frames",
            "flush completed"
          ]
        },
        {
          "relationshipId": "independent-i420-samples",
          "class": "required",
          "preconditions": [
            "returned native I420 format",
            "FFmpeg native decoder reference"
          ]
        }
      ]
    }
  },
  {
    "key": "video.decoder-response.1280x720-vp8-prefer-hardware",
    "inputs": {
      "1280x720-vp8-prefer-hardware": {
        "config": {
          "codec": "vp8",
          "codedWidth": 1280,
          "codedHeight": 720,
          "optimizeForLatency": true
        },
        "preference": "prefer-hardware",
        "fixtureSha256": "e09b844ef3def1f1fb1504f90d754d5c3582daf8763f2230414e5159120233a7"
      }
    },
    "controls": {}
  },
  {
    "key": "video.decoder-response.1280x720-vp8-prefer-software",
    "inputs": {
      "1280x720-vp8-prefer-software": {
        "config": {
          "codec": "vp8",
          "codedWidth": 1280,
          "codedHeight": 720,
          "optimizeForLatency": true
        },
        "preference": "prefer-software",
        "fixtureSha256": "e09b844ef3def1f1fb1504f90d754d5c3582daf8763f2230414e5159120233a7"
      }
    },
    "controls": {
      "1280x720-vp8-prefer-software": [
        {
          "relationshipId": "decoded-count-and-timestamps",
          "class": "required",
          "preconditions": [
            "eight owned key frames",
            "flush completed"
          ]
        },
        {
          "relationshipId": "independent-i420-samples",
          "class": "required",
          "preconditions": [
            "returned native I420 format",
            "FFmpeg native decoder reference"
          ]
        }
      ]
    }
  },
  {
    "key": "video.decoder-response.1280x720-vp8-no-preference",
    "inputs": {
      "1280x720-vp8-no-preference": {
        "config": {
          "codec": "vp8",
          "codedWidth": 1280,
          "codedHeight": 720,
          "optimizeForLatency": true
        },
        "preference": "no-preference",
        "fixtureSha256": "e09b844ef3def1f1fb1504f90d754d5c3582daf8763f2230414e5159120233a7"
      }
    },
    "controls": {
      "1280x720-vp8-no-preference": [
        {
          "relationshipId": "decoded-count-and-timestamps",
          "class": "required",
          "preconditions": [
            "eight owned key frames",
            "flush completed"
          ]
        },
        {
          "relationshipId": "independent-i420-samples",
          "class": "required",
          "preconditions": [
            "returned native I420 format",
            "FFmpeg native decoder reference"
          ]
        }
      ]
    }
  }
]

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.decoder-response. 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/decoder-response"
import asset0 from "/core/fixtures/video/decoder-response/response-160x96-vp8.ivf?url"
import asset1 from "/core/fixtures/video/decoder-response/response-1280x720-vp8.ivf?url"

const signal = measurementModule({ "small": asset0, "large": 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