{
  "analyzedAt": "2026-10-31T17:14:31.215Z",
  "protocolVersion": 1.1,
  "versions": [
    {
      "node": "v24.21.0",
      "platform": "darwin",
      "arch": "arm64",
      "ffmpeg": "ffmpeg version 9.0.2 Copyright (c) 2000-2026 the FFmpeg developers",
      "ffprobe": "ffprobe version 9.0.2 Copyright (c) 2007-2026 the FFmpeg developers",
      "browser": "Chrome/156.0.8078.74"
    },
    {
      "node": "v24.21.0",
      "platform": "darwin",
      "arch": "arm64",
      "ffmpeg": "ffmpeg version 9.0.2 Copyright (c) 2000-2026 the FFmpeg developers",
      "ffprobe": "ffprobe version 9.0.2 Copyright (c) 2007-2026 the FFmpeg developers",
      "browser": "Chrome/156.0.8078.74"
    }
  ],
  "sourceCount": 1,
  "relatedCaseCount": 8,
  "fullRuns": 2,
  "attemptCount": 20,
  "caseStates": {
    "bothPictureAndEnd": 6,
    "bothEndedWithoutPicture": 1,
    "bothMediaError": 1
  },
  "samePacketPayloadPairEachRun": true,
  "allOutputByteHashesRepeat": true,
  "cases": [
    {
      "id": "P01",
      "name": "H.264 / AAC, MP4, trailing index",
      "file": "P01-tail.mp4",
      "mime": "video/mp4",
      "sha256": "832a1bb7c3c7d6187330bc95c517ecdda6cd0a27ef556da9804cb669e0743d0f",
      "bytes": 287147,
      "fileUrl": "/blog-assets/video-export-study/clips/832a1bb7c3c7d6187330bc95c517ecdda6cd0a27ef556da9804cb669e0743d0f.mp4",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "h264",
          "profile": "High",
          "pixelFormat": "yuv420p",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "aac",
          "profile": "LC",
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "188"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "973824c5af60a44f2bdc8bae3de4eb8ac0962ee0b900f0307dc679713008c3c1",
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 32,
          "complete": true
        },
        {
          "type": "free",
          "offset": 32,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 40,
          "size": 283003,
          "complete": true
        },
        {
          "type": "moov",
          "offset": 283043,
          "size": 4104,
          "complete": true
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 460.1,
          "loadeddataMs": 160,
          "endedMs": 4208.9,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 19.5,
          "loadeddataMs": 14.4,
          "endedMs": 4057.4,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P02",
      "name": "Same packet payloads, MP4 faststart",
      "file": "P02-fast.mp4",
      "mime": "video/mp4",
      "sha256": "3bc071e9c3f6ba5d730e774fd9fa34ab4e235e3151872279bd55011263c3d5fd",
      "bytes": 287147,
      "fileUrl": "/blog-assets/video-export-study/clips/3bc071e9c3f6ba5d730e774fd9fa34ab4e235e3151872279bd55011263c3d5fd.mp4",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "h264",
          "profile": "High",
          "pixelFormat": "yuv420p",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "aac",
          "profile": "LC",
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "188"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "973824c5af60a44f2bdc8bae3de4eb8ac0962ee0b900f0307dc679713008c3c1",
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 32,
          "complete": true
        },
        {
          "type": "moov",
          "offset": 32,
          "size": 4104,
          "complete": true
        },
        {
          "type": "free",
          "offset": 4136,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 4144,
          "size": 283003,
          "complete": true
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 32.1,
          "loadeddataMs": 21.9,
          "endedMs": 4070.7,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 30.6,
          "loadeddataMs": 20.2,
          "endedMs": 4062.4,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P03",
      "name": "H.264 4:4:4 / AAC, MP4",
      "file": "P03-444.mp4",
      "mime": "video/mp4",
      "sha256": "0601b0094ac1b96937628c00a3134f04feff44436389bfc7744b8c6bab11276a",
      "bytes": 283789,
      "fileUrl": "/blog-assets/video-export-study/clips/0601b0094ac1b96937628c00a3134f04feff44436389bfc7744b8c6bab11276a.mp4",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "h264",
          "profile": "High 4:4:4 Predictive",
          "pixelFormat": "yuv444p",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "aac",
          "profile": "LC",
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "188"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "36433e7aa28d8ce4109275641bd4440dfaba0c88093ae4b0b2c3192c7d1c5aa5",
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 32,
          "complete": true
        },
        {
          "type": "moov",
          "offset": 32,
          "size": 4104,
          "complete": true
        },
        {
          "type": "free",
          "offset": 4136,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 4144,
          "size": 279645,
          "complete": true
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 15.5,
          "loadeddataMs": 10.5,
          "endedMs": 4058.9,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 8.8,
          "loadeddataMs": 6.9,
          "endedMs": 4051,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P04",
      "name": "HEVC 10-bit / AAC, MP4",
      "file": "P04-hevc.mp4",
      "mime": "video/mp4",
      "sha256": "d239596287da77535ec8da8395e7f34656bdea52144a1a116e6940db0caf7ee8",
      "bytes": 225027,
      "fileUrl": "/blog-assets/video-export-study/clips/d239596287da77535ec8da8395e7f34656bdea52144a1a116e6940db0caf7ee8.mp4",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "hevc",
          "profile": "Main 10",
          "pixelFormat": "yuv420p10le",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "aac",
          "profile": "LC",
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "188"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "c8008f32d29598275e4e8efa6586f3b8d2c696b04751d9b2ce06c99a4e15c217",
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 28,
          "complete": true
        },
        {
          "type": "moov",
          "offset": 28,
          "size": 6516,
          "complete": true
        },
        {
          "type": "free",
          "offset": 6544,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 6552,
          "size": 218475,
          "complete": true
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 67.8,
          "loadeddataMs": 64.8,
          "endedMs": 4113.8,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 63.2,
          "loadeddataMs": 66.9,
          "endedMs": 4117.1,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P05",
      "name": "VP9 / Opus, WebM",
      "file": "P05-vp9.webm",
      "mime": "video/webm",
      "sha256": "c004374adfef32c2fc656a88391d9cf07579ac7f2ccdbdd2684155ef2e01267a",
      "bytes": 348205,
      "fileUrl": "/blog-assets/video-export-study/clips/c004374adfef32c2fc656a88391d9cf07579ac7f2ccdbdd2684155ef2e01267a.webm",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "vp9",
          "profile": "Profile 0",
          "pixelFormat": "yuv420p",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "opus",
          "profile": null,
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "201"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "ff4d9fbdc6afce6812c05af2caaae51cadac4b9fecd331bbf2449afb441a8878",
      "atoms": null,
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 28,
          "loadeddataMs": 20.4,
          "endedMs": 4067.1,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 15.2,
          "loadeddataMs": 21.4,
          "endedMs": 4061.7,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P06",
      "name": "AV1 / Opus, WebM",
      "file": "P06-av1.webm",
      "mime": "video/webm",
      "sha256": "06492e293f7708277dfd0e4f06d1405c28f727c780bb985148387b77c1a51f70",
      "bytes": 379816,
      "fileUrl": "/blog-assets/video-export-study/clips/06492e293f7708277dfd0e4f06d1405c28f727c780bb985148387b77c1a51f70.webm",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "av1",
          "profile": "Main",
          "pixelFormat": "yuv420p",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "opus",
          "profile": null,
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "201"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "e008bab2053a3e36d1b9e872eeb022219d2a812a71dd8af23a8c11f8fd2ea12f",
      "atoms": null,
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 29.2,
          "loadeddataMs": 21.6,
          "endedMs": 4071.1,
          "pictureEvidence": true,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "maybe",
          "videoWidth": 480,
          "videoHeight": 270,
          "reportedFrames": 96,
          "firstFrameMs": 15.6,
          "loadeddataMs": 21.3,
          "endedMs": 4064.6,
          "pictureEvidence": true,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": true,
      "bothEndedWithoutPicture": false,
      "bothMediaError": false
    },
    {
      "id": "P07",
      "name": "ProRes 422 / PCM, MOV",
      "file": "P07-prores.mov",
      "mime": "video/quicktime",
      "sha256": "0e514aada9d15b91be5975fa3ae87057ee93ff8ac0fbc9b0805943751ff39516",
      "bytes": 4418053,
      "fileUrl": "/blog-assets/video-export-study/clips/0e514aada9d15b91be5975fa3ae87057ee93ff8ac0fbc9b0805943751ff39516.mov",
      "byteHashesRepeat": true,
      "streams": [
        {
          "type": "video",
          "codec": "prores",
          "profile": "Standard",
          "pixelFormat": "yuv422p10le",
          "width": 480,
          "height": 270,
          "sampleRate": null,
          "channels": null,
          "frames": "96"
        },
        {
          "type": "audio",
          "codec": "pcm_s16le",
          "profile": null,
          "pixelFormat": null,
          "width": null,
          "height": null,
          "sampleRate": "48000",
          "channels": 2,
          "frames": "188"
        }
      ],
      "independentDecodedFrames": 96,
      "packetPayloadSha256": "f0497090658250840ec37691c94f589e15b3b5ce0996366efd5b94f65c3617f4",
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 20,
          "complete": true
        },
        {
          "type": "wide",
          "offset": 20,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 28,
          "size": 4415599,
          "complete": true
        },
        {
          "type": "moov",
          "offset": 4415627,
          "size": 2426,
          "complete": true
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "ended",
          "containerPrediction": "",
          "videoWidth": 0,
          "videoHeight": 0,
          "reportedFrames": 0,
          "firstFrameMs": null,
          "loadeddataMs": 10.8,
          "endedMs": 4054.5,
          "pictureEvidence": false,
          "errorCode": null
        },
        {
          "run": 2,
          "status": "ended",
          "containerPrediction": "",
          "videoWidth": 0,
          "videoHeight": 0,
          "reportedFrames": 0,
          "firstFrameMs": null,
          "loadeddataMs": 9.4,
          "endedMs": 4051.7,
          "pictureEvidence": false,
          "errorCode": null
        }
      ],
      "bothPictureAndEnd": false,
      "bothEndedWithoutPicture": true,
      "bothMediaError": false
    },
    {
      "id": "P08",
      "name": "Deliberately truncated MP4 (first half)",
      "file": "P08-truncated.mp4",
      "mime": "video/mp4",
      "sha256": "bc810d3ad5a8d75f7786b0527ad9699e35741d3b69e845094830a67a9c891a65",
      "bytes": 143573,
      "fileUrl": "/blog-assets/video-export-study/clips/bc810d3ad5a8d75f7786b0527ad9699e35741d3b69e845094830a67a9c891a65.mp4",
      "byteHashesRepeat": true,
      "streams": null,
      "independentDecodedFrames": null,
      "packetPayloadSha256": null,
      "atoms": [
        {
          "type": "ftyp",
          "offset": 0,
          "size": 32,
          "complete": true
        },
        {
          "type": "free",
          "offset": 32,
          "size": 8,
          "complete": true
        },
        {
          "type": "mdat",
          "offset": 40,
          "size": 283003,
          "complete": false
        }
      ],
      "fastRuns": [
        {
          "run": 1,
          "status": "media-error",
          "containerPrediction": "maybe",
          "videoWidth": 0,
          "videoHeight": 0,
          "reportedFrames": 0,
          "firstFrameMs": null,
          "loadeddataMs": null,
          "endedMs": null,
          "pictureEvidence": false,
          "errorCode": 4
        },
        {
          "run": 2,
          "status": "media-error",
          "containerPrediction": "maybe",
          "videoWidth": 0,
          "videoHeight": 0,
          "reportedFrames": 0,
          "firstFrameMs": null,
          "loadeddataMs": null,
          "endedMs": null,
          "pictureEvidence": false,
          "errorCode": 4
        }
      ],
      "bothPictureAndEnd": false,
      "bothEndedWithoutPicture": false,
      "bothMediaError": true
    }
  ],
  "slowPair": [
    {
      "run": 1,
      "id": "P01",
      "status": "ended",
      "loadeddataMs": 972.5,
      "firstFrameMs": 980.5,
      "endedMs": 5751.9,
      "serverOfferedBytesAtLoadeddataNotification": 57771,
      "reportedFrames": 96,
      "droppedFrames": 4
    },
    {
      "run": 1,
      "id": "P02",
      "status": "ended",
      "loadeddataMs": 534.3,
      "firstFrameMs": 529.7,
      "endedMs": 5337.7,
      "serverOfferedBytesAtLoadeddataNotification": 32768,
      "reportedFrames": 96,
      "droppedFrames": 5
    },
    {
      "run": 2,
      "id": "P02",
      "status": "ended",
      "loadeddataMs": 621.8,
      "firstFrameMs": 622.2,
      "endedMs": 5341.6,
      "serverOfferedBytesAtLoadeddataNotification": 36864,
      "reportedFrames": 96,
      "droppedFrames": 5
    },
    {
      "run": 2,
      "id": "P01",
      "status": "ended",
      "loadeddataMs": 990.8,
      "firstFrameMs": 988.9,
      "endedMs": 5741.7,
      "serverOfferedBytesAtLoadeddataNotification": 57771,
      "reportedFrames": 96,
      "droppedFrames": 2
    }
  ],
  "limits": "One synthetic source and one Chrome/macOS/arm64 environment. Picture evidence means the recorded dimensions, first-frame callback, frame counter and end, not human inspection of every frame. Timing repeats are not independent devices or a calibrated internet benchmark. Invalid case retained; first incomplete tooling attempt retained separately."
}