exifs-2-json

Get Exif data from JPG files from the folder and its sub-folders. Asynchronously. Export data to file or/and to a variable.

Usage

npm install exifs-2-json

import exifs2json from 'exifs-2-json';

// export to variable
const exifs = await exifs2json('/path/to/my/pictures');
console.log(exifs);

// export to file
const options = { output: '../output.json' }
await exifs2json('/path/to/my/pictures', options);

Returned data can be saved to a file or assigned to the variable, or both - to file and variable at the same time.

Use options to specify the output file name and path.

Options

name	type	default	description
output	string	undefined	A file name with path. Without a value, the file will not be created.
noBuffers	boolean	true	With true all Buffer objects will be removed from Exif data. Read more about Buffers.

Results

The module returns an object with the following structure:

{
  "data": [
    {
      "file": "path/image-1.jpg",
      "err": null,
      "exif": {...}
    },
    {
      "file": "path/image-2.jpg",
      "err": null,
      "exif": {...}
    },
    {
      "file": "path/no-image.jpg",
      "err": "The given image is not a JPEG and thus unsupported right now.",
      "exif": null
    }
  ]
}

A single Exif object can look like below, but the properties and contents of the metadata might vary widely depending on the data saved in the file. You can expect dictionaries that look similar to this:

{
  "exif": {
    "image": {
      "Make": "NIKON CORPORATION",
      "Model": "NIKON D5200",
      "Orientation": 1,
      "XResolution": 300,
      "YResolution": 300,
      "ResolutionUnit": 2,
      "Software": "Ver.1.00 ",
      "ModifyDate": "2020:09:04 09:07:09",
      "YCbCrPositioning": 2,
      "ExifOffset": 222,
      "GPSInfo": 15152
    },
    "thumbnail": {
      "Compression": 6,
      "XResolution": 300,
      "YResolution": 300,
      "ResolutionUnit": 2,
      "ThumbnailOffset": 15404,
      "ThumbnailLength": 8439,
      "YCbCrPositioning": 2
    },
    "exif": {
      "ExposureTime": 0.003125,
      "FNumber": 2.8,
      "ExposureProgram": 3,
      "ISO": 250,
      "SensitivityType": 2,
      "DateTimeOriginal": "2020:09:04 09:07:09",
      "CreateDate": "2020:09:04 09:07:09",
      "CompressedBitsPerPixel": 4,
      "ExposureCompensation": 0,
      "MaxApertureValue": 3,
      "MeteringMode": 5,
      "LightSource": 0,
      "Flash": 0,
      "FocalLength": 26,
      "SubSecTime": "30",
      "SubSecTimeOriginal": "30",
      "SubSecTimeDigitized": "30",
      "ColorSpace": 1,
      "ExifImageWidth": 6000,
      "ExifImageHeight": 4000,
      "InteropOffset": 15122,
      "SensingMethod": 2,
      "CustomRendered": 0,
      "ExposureMode": 0,
      "WhiteBalance": 0,
      "DigitalZoomRatio": 1,
      "FocalLengthIn35mmFormat": 26,
      "SceneCaptureType": 0,
      "GainControl": 0,
      "Contrast": 0,
      "Saturation": 0,
      "Sharpness": 0,
      "SubjectDistanceRange": 0
    },
    "gps": {
      "GPSVersionID": [2, 3, 0, 0],
      "GPSLatitudeRef": "N",
      "GPSLatitude": [46, 12, 21.096],
      "GPSLongitudeRef": "E",
      "GPSLongitude": [10, 51, 59.72039942938659],
      "GPSAltitudeRef": 0,
      "GPSAltitude": 1619.5112359550562
    },
    "interoperability": {
      "InteropIndex": "R98"
    },
    "makernote": {
      "error": "Unable to extract Makernote information as it is in an unsupported or unrecognized format."
    }
  }
}

License

MIT