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Question

Convert iPhone photo to JPG before upload to server?

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The issue I'm having is that I'm trying to have the user upload a photo from their iPhone to my server. However, I don't want their raw, large file size photo. Is there a way I can encode the photo to a smaller quality JPG before the user uploads it?

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Colin Holgate

Inspiring

Yes, read about JPEGEncoderOptions:

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/JPEGEncoderOptions.html

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J

John_Locke_2013Author

Inspiring

Thanks for the quick reply, Colin. The problem I'm having is how do I use the JPEGEncoder when the photo data is in a ByteArray?

// Create a new imagePromise

var imagePromise:MediaPromise = evt.data;

// Open our data source

dataSource = imagePromise.open();

var imageBytes:ByteArray = new ByteArray();

dataSource.readBytes( imageBytes );

// Create a new FileStream

var stream:FileStream = new FileStream();

stream.open(temp, FileMode.WRITE);

stream.writeBytes(imageBytes);

stream.close();

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Colin Holgate

Inspiring

You can get the bitmap from the media promise with this:

var imageB = imageLoader.content as Bitmap;

This gives you the bitmapdata and encodes it as a jPEG ByteArray

var imageBD:BitmapData = imageB.bitmapData;

var byteArray:ByteArray = new ByteArray();

imageBD.encode(new Rectangle(0,0,imageBD.width, imageBD.height), new JPEGEncoderOptions(), byteArray);

‘byteArray’ now is the JPEG ready to upload. The whole upload side of things is its own issue, but I’ll wait to see if you have questions on that!

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