Strip media metadata. #2907
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Strip media metadata. #2907
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| kCGImagePropertyJFIFDictionary as String : kCFNull, | ||
| kCGImagePropertyPNGDictionary as String : kCFNull, | ||
| kCGImagePropertyIPTCDictionary as String : kCFNull, | ||
| kCGImagePropertyMakerAppleDictionary as String : kCFNull |
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Things to test
- Orientation is preserved.
- GIF timing is preserved.
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- Color profiles are preservd.
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Hi! I just re-tested that the color space and profile, as well as orientation is preserved.
After stripping the data, these fields are left, for example:
([{TIFF}: {
Orientation = 1;
ResolutionUnit = 2;
XResolution = 72;
YResolution = 72;
}, PixelWidth: 3264, {Exif}: {
ColorSpace = 1;
PixelXDimension = 3264;
PixelYDimension = 2448;
}, PixelHeight: 2448, {JFIF}: {
DensityUnit = 0;
JFIFVersion = (
1,
0,
1
);
XDensity = 72;
YDensity = 72;
}, ProfileName: sRGB IEC61966-2.1, DPIWidth: 72, DPIHeight: 72, ColorModel: RGB, Orientation: 1, Depth: 8])
Timing looks good even with the iOS 11 live photo "GIF" movies that can be sent.
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Hey @collinstuart - we had a rather large release backlogged, but now that it's out, we'd like to test this and get it merged. Can you rebase? |
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@michaelkirk - sure, I should be able to get to that today! |
- removes non-orientation metadata from image and video attachments - option to disable the feature // FREEBIE
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@michaelkirk done :) |
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In d9b8ce2. Thanks! |
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Description
Strips non-orientation metadata from image and video attachments, with an option to leave the metadata in. This was tested by printing out the metadata dictionaries before and after the modification, as well as checking the attachment on a secondary device to make sure the information was truly removed.
All attachments flow through the SignalAttachment class. Images flow through the imageAttachment method of that class which strips out the metadata. I noticed that the master branch has been updated so that all video attachments are piped through the compressVideoAsMp4 inside the SignalAttachment class, so removal of video metadata was implemented there.
Fixes #1984