{
  "name": "Valmera logo overlay renderer example",
  "created": "2026-09-08",
  "page": "https://valmera.io/docs/text-and-overlays",
  "creationSurface": "Local invocation of the production-revision Valmera filtergraph builder with a supplied EDL, followed by FFmpeg encoding. No Studio agent request or account export.",
  "backendSourceCommit": "b6f8ed84ed2057c979bcc47207ac5a1d74fb8c81",
  "source": {
    "url": "https://valmera.io/examples/trim-and-reframe/original-source.mp4",
    "bytes": 287285,
    "sha256": "24dc72de92df8e0d212fa9ca068d3ffdacab55f74b91c32249be96e9e74defdf",
    "provenance": "Previously published Valmera-authored silent motion-graphic sample. Wording and animation already exist in the source.",
    "width": 1280,
    "height": 720,
    "fps": 30,
    "decodedFrames": 750
  },
  "logo": {
    "url": "https://valmera.io/examples/logo-overlay/logo.png",
    "bytes": 15248,
    "sha256": "aa7af10de4108079116f250d4f66c64aae064728df74adc9cd4a1505133bc85d",
    "provenance": "Existing Valmera email-logo.png, copied without image changes.",
    "width": 439,
    "height": 136,
    "alphaChannel": true
  },
  "instructions": {
    "keptSourceSeconds": [
      [
        0,
        25
      ]
    ],
    "overlayProgramWindowSeconds": [
      3,
      22
    ],
    "overlayWidthFraction": 0.2,
    "centerXFraction": 0.86,
    "centerYFraction": 0.1,
    "opacity": 1.0,
    "animation": null
  },
  "render": {
    "url": "https://valmera.io/examples/logo-overlay/logo-example.mp4",
    "bytes": 294130,
    "sha256": "74bb73be71ecda7e60d9584dfb97c68cf6fa85992705422387dc26d4a2d5a0fd",
    "width": 1280,
    "height": 720,
    "fps": 30,
    "decodedVideoFrames": 749,
    "videoDurationFromFramesSeconds": 24.966666666666665,
    "descriptionDuration": "Approximately 25 seconds",
    "videoCodec": "H.264",
    "audioCodec": "AAC",
    "audioContent": "silent",
    "encoder": "FFmpeg 7.1; libx264 veryfast CRF20, yuv420p, 30fps CFR; AAC192k"
  },
  "poster": {
    "url": "https://valmera.io/examples/logo-overlay/poster.jpg",
    "bytes": 50364,
    "sha256": "cda46a1aef9d229fa5169f6a6c7de6f187692d2eaac8b321400c6541ea556e1f",
    "source": "Unaltered frame extracted at output second 5"
  },
  "edit": {
    "url": "https://valmera.io/examples/logo-overlay/edit.json",
    "bytes": 751,
    "sha256": "20b7643661fd51851fa6c4631cd693cd61210855ac5fe38ff938064dea852475"
  },
  "filtergraph": {
    "url": "https://valmera.io/examples/logo-overlay/filtergraph.txt",
    "bytes": 620,
    "sha256": "3b0bc99da0605bdb89f85601ef80fe4626dff5e28ab56a3178fe6ad861c1ee21"
  },
  "verification": {
    "verifiedAt": "2026-09-07T22:39:25.795223+00:00",
    "sourceDecodeExit": 0,
    "outputDecodeExit": 0,
    "comparedFrames": 749,
    "comparison": "Corresponding source and output frames decoded to 320x180 RGB. The logo box plus resampling margin is excluded when checking background continuity. Mean absolute errors use a 0\u2013255 channel scale.",
    "meanBackgroundError": 0.11927529444264341,
    "maxBackgroundFrameError": 0.177081465006995,
    "firstDetectedLogoFrame": 90,
    "lastDetectedLogoFrame": 659,
    "logoDetectionThreshold": "Mean absolute source/output difference >5 within the expanded logo box.",
    "detectedLogoStartSeconds": 3.0,
    "lastDetectedLogoFrameSeconds": 21.966666666666665,
    "audioPeakAbsolute": 0.0,
    "visualSampleTimes": [
      0,
      2.9,
      3.0,
      5.0,
      12.0,
      21.9,
      22.1,
      24.9
    ]
  },
  "limitations": [
    "Local renderer demonstration; does not establish agent prompt success, upload behavior, account pricing, processing speed or Studio export branding.",
    "No captions, audio mixing, moving-subject tracking, fades or other output ratios tested.",
    "Output contains 749 decoded video frames compared with 750 source frames; it is not claimed to preserve every source frame.",
    "Background pixel comparison is a continuity check, not a visual quality score."
  ]
}