Compress file using javascript cordova framework

[Harshal Patel]

In my project, I'm able to capture the image via camera or gallery the size of the Image file vary to 5-6 MB based on the quality of camera or user selected image.Then I have to upload it on server.

The requirement is, before upload the file on remote server, I want to apply lossless compression on image to reduce the file size to 1-2MB so it will save internet cost of user & and my server space as well.

We can't do it at the time of calling method from navigator with options {targetHeight: xxx, targetWidth: xxx} to capture image as the application may use in various devices which has various orientations too.

Thanks for any help.

[Diego La Monica]

Using the method getPicture for Real Time Camera (SourceType: CAMERA) you can use the quality compression option. But because this parameter (quality) is not considered for images taken from the library ( read the notes here http://cordova.apache.org/docs/en/3.3.0/cordova_camera_camera.md.html#camera.getPicture  ) AFAIK the only way to do this is to write the image in a canvas element then get the canvas data uri and send to server, but beware the memory usage, because with heavy image you can stuck the app.

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Diego La Monica
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Software, Web, Standard, Accessibility
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