I'm currently retrieving images (and associated metadata) from the iCloud Photo Library using the Photos framework (PhotoKit) and the following code:
PHAsset *asset = ...;
PHImageRequestOptions *options = [PHImageRequestOptions new];
options.networkAccessAllowed = YES;
options.version = PHImageRequestOptionsVersionCurrent;
options.resizeMode = PHImageRequestOptionsResizeModeNone;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat; // ignored by requestImageDataForAsset
self.requestID = [self.imageManager requestImageDataForAsset:asset options:options resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {
if (imageData) {
NSDictionary *metadata = nil;
CGImageSourceRef sourceRef = CGImageSourceCreateWithData((CFDataRef)imageData, NULL);
if (sourceRef) {
CFDictionaryRef dictionaryRef = CGImageSourceCopyPropertiesAtIndex(sourceRef, 0, NULL);
if (dictionaryRef) {
metadata = (__bridge NSDictionary *)dictionaryRef;
CFRelease (dictionaryRef);
}
CFRelease (sourceRef);
}
NSLog("metadata = %#", metadata);
self.requestID = PHInvalidAssetResourceDataRequestID;
}
}];
The problem I'm having is that the metadata that's returned is from the original file. It does not contain any modifications for title, description, or keywords done with the Photos app (these items are stored in the {IPTC} category.)
The header documentation for -requestImageDataForAsset:options:resultHandler states that PHImageRequestOptionsVersionCurrent can be used to retrieve the adjusted rendered image but this doesn't seem to apply to adjustments to the metadata.
Is there another way to get the modified metadata from the Photos framework? Customers who use the Photos app on the Mac to add titles, descriptions, and keywords to their images would like to see the results on iOS.
Related
I'm trying to get all photos from photos library with image's metadata. It works fine for 10-20 images but when there are 50+ images it occupies too much memory, which causes to app crash.
Why i need all images into array?
Answer - to send images to server app. [i'm using GCDAsyncSocket to send data on receiver socket/port and i don't have that much waiting time to request images from PHAsset while sending images on socket/port.
My Code :
+(void)getPhotosDataFromCamera:(void(^)(NSMutableArray *arrImageData))completionHandler
{
[PhotosManager checkPhotosPermission:^(bool granted)
{
if (granted)
{
NSMutableArray *arrImageData = [NSMutableArray new];
NSArray *arrImages=[[NSArray alloc] init];
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
NSLog(#"%d",(int)result.count);
arrImages = [result copy];
//--- If no images.
if (arrImages.count <= 0)
{
completionHandler(nil);
return ;
}
__block int index = 1;
__block BOOL isDone = false;
for (PHAsset *asset in arrImages)
{
[PhotosManager requestMetadata:asset withCompletionBlock:^(UIImage *image, NSDictionary *metadata)
{
#autoreleasepool
{
NSData *imageData = metadata?[PhotosManager addExif:image metaData:metadata]:UIImageJPEGRepresentation(image, 1.0f);
if (imageData != nil)
{
[arrImageData addObject:imageData];
NSLog(#"Adding images :%i",index);
//--- Done adding all images.
if (index == arrImages.count)
{
isDone = true;
NSLog(#"Done adding all images with info!!");
completionHandler(arrImageData);
}
index++;
}
}
}];
}
}
else
{
completionHandler(nil);
}
}];
}
typedef void (^PHAssetMetadataBlock)(UIImage *image,NSDictionary *metadata);
+(void)requestMetadata:(PHAsset *)asset withCompletionBlock:(PHAssetMetadataBlock)completionBlock
{
PHContentEditingInputRequestOptions *editOptions = [[PHContentEditingInputRequestOptions alloc]init];
editOptions.networkAccessAllowed = YES;
[asset requestContentEditingInputWithOptions:editOptions completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info)
{
CIImage *CGimage = [CIImage imageWithContentsOfURL:contentEditingInput.fullSizeImageURL];
UIImage *image = contentEditingInput.displaySizeImage;
dispatch_async(dispatch_get_main_queue(), ^{
completionBlock(image,CGimage.properties);
});
CGimage = nil;
image = nil;
}];
editOptions = nil;
asset =nil;
}
+ (NSData *)addExif:(UIImage*)toImage metaData:(NSDictionary *)container
{
NSData *imageData = UIImageJPEGRepresentation(toImage, 1.0f);
// create an imagesourceref
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef) imageData, NULL);
// this is the type of image (e.g., public.jpeg)
CFStringRef UTI = CGImageSourceGetType(source);
// create a new data object and write the new image into it
NSMutableData *dest_data = [[NSMutableData alloc] initWithLength:imageData.length+2000];
CGImageDestinationRef destination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)dest_data, UTI, 1, NULL);
if (!destination) {
NSLog(#"Error: Could not create image destination");
}
// add the image contained in the image source to the destination, overidding the old metadata with our modified metadata
CGImageDestinationAddImageFromSource(destination, source, 0, (__bridge CFDictionaryRef) container);
BOOL success = NO;
success = CGImageDestinationFinalize(destination);
if (!success) {
NSLog(#"Error: Could not create data from image destination");
}
CFRelease(destination);
CFRelease(source);
imageData = nil;
source = nil;
destination = nil;
return dest_data;
}
Well it's not a surprise that you arrive into this situation, since each of your image consumes memory and you instantiate and keep them in memory. This is not really a correct design approach.
In the end it depends on what you want to do with those images.
What I would suggest is that you keep just the array of your PHAsset objects and request the image only on demand.
Like if you want to represent those images into a tableView/collectionView, perform the call to
[PhotosManager requestMetadata:asset withCompletionBlock:^(UIImage *image, NSDictionary *metadata)
directly in the particular method. This way you won't drain the device memory.
There simply is not enough memory on the phone to load all of the images into the photo library into memory at the same time.
If you want to display the images, then only fetch the images that you need for immediate display. For the rest keep just he PHAsset. Make sure to discard the images when you don't need them any more.
If you need thumbnails, then fetch only the thumbnails that you need.
If want to do something with all of the images - like add a watermark to them or process them in some way - then process each image one at a time in a queue.
I cannot advise further as your question doesn't state why you need all of the images.
my company is having a big problem with getting correct size metadata by fetching PHAssets.
We have developed an iOS applications that lets customers choose pictures from library, get the size (in pixel) for each of them, calculate coordinates for adjusting to gadgets we sell, then upload high quality version of picture to our server to print gadgets.
For some of our customers, the problem is that the size in pixel of some of the high-quality versions of pictures sent, does not match pixelWidth and pixelHeight given by the PHAsset object.
To make an example, we have a picture that:
is reported to be 2096x3724 by PHAsset object
but, when full size image is requested, a 1536x2730 picture is generated
The picture is not in iCloud, and is sent by an iPhone 6 SE running iOS 10.2.
This is the code to get full size image version:
PHImageRequestOptions *imgOpts = [[PHImageRequestOptions alloc] init];
imgOpts.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
imgOpts.networkAccessAllowed = YES;
imgOpts.resizeMode = PHImageRequestOptionsResizeModeExact;
imgOpts.version = PHImageRequestOptionsVersionCurrent;
PHCachingImageManager *imageManager = [[PHCachingImageManager alloc] init];
[imageManager requestImageForAsset:imageAsset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeDefault options:imgOpts resultHandler:^(UIImage * result, NSDictionary * info) {
NSData * imageData = UIImageJPEGRepresentation(result, 0.92f);
//UPLOAD OF imageData TO SERVER HERE
}]
Also tried with requestImageDataForAsset method, but with no luck:
PHImageRequestOptions *imgOpts = [[PHImageRequestOptions alloc] init];
imgOpts.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
imgOpts.networkAccessAllowed = YES;
imgOpts.resizeMode = PHImageRequestOptionsResizeModeExact;
imgOpts.version = PHImageRequestOptionsVersionCurrent;
PHCachingImageManager *imageManager = [[PHCachingImageManager alloc] init];
[imageManager requestImageDataForAsset:imageAsset options:imgOpts resultHandler:^(NSData * imageData, NSString * dataUTI, UIImageOrientation orientation, NSDictionary * info) {
//UPLOAD OF imageData TO SERVER HERE
}]
Getting exact size from high-resolution version of every picture, before doing upload, is not an option for us, 'cause it would degrade a lot performance when selecting a large amount of assets from the library.
Are we missing or doing something wrong?
Is there a way to get asset size in pixel without loading full-resolution image into memory?
Thanks for helping
This is due to a bug in Photos framework. Details about the bug can be found here.
Sometimes, after a photo is edited, a smaller version is created. This only occurs for some larger photos.
Calling either requestImageForAsset: (with PHImageManagerMaximumSize) or requestImageDataForAsset: (with PHImageRequestOptionsDeliveryModeHighQualityFormat) will read the data from the smaller file version, when trying to retrieve the edited version (PHImageRequestOptionsVersionCurrent).
The info in the callback of the above methods will point the path to the image. As an example:
PHImageFileURLKey = "file:///[...]DCIM/100APPLE/IMG_0006/Adjustments/IMG_0006.JPG";
Inspecting that folder, I was able to find another image, FullSizeRender.jpg - this one has the full size and contains the latest edits. Thus, one way would be to try and read from the FullSizeRender.jpg, when such a file is present.
Starting with iOS 9, it's also possible to fetch the latest edit, at highest resolution, using the PHAssetResourceManager:
// if (#available(iOS 9.0, *)) {
// check if a high quality edit is available
NSArray<PHAssetResource *> *resources = [PHAssetResource assetResourcesForAsset:_asset];
PHAssetResource *hqResource = nil;
for (PHAssetResource *res in resources) {
if (res.type == PHAssetResourceTypeFullSizePhoto) {
// from my tests so far, this is only present for edited photos
hqResource = res;
break;
}
}
if (hqResource) {
PHAssetResourceRequestOptions *options = [[PHAssetResourceRequestOptions alloc] init];
options.networkAccessAllowed = YES;
long long fileSize = [[hqResource valueForKey:#"fileSize"] longLongValue];
NSMutableData *fullData = [[NSMutableData alloc] initWithCapacity:fileSize];
[[PHAssetResourceManager defaultManager] requestDataForAssetResource:hqResource options:options dataReceivedHandler:^(NSData * _Nonnull data) {
// append the data that we're receiving
[fullData appendData:data];
} completionHandler:^(NSError * _Nullable error) {
// handle completion, using `fullData` or `error`
// uti == hqResource.uniformTypeIdentifier
// orientation == UIImageOrientationUp
}];
}
else {
// use `requestImageDataForAsset:`, `requestImageForAsset:` or `requestDataForAssetResource:` with a different `PHAssetResource`
}
can you try this to fetch camera Roll pics:
__weak __typeof(self) weakSelf = self;
PHFetchResult<PHAssetCollection *> *albums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumSelfPortraits options:nil];
[albums enumerateObjectsUsingBlock:^(PHAssetCollection * _Nonnull album, NSUInteger idx, BOOL * _Nonnull stop) {
PHFetchOptions *options = [[PHFetchOptions alloc] init];
options.wantsIncrementalChangeDetails = YES;
options.predicate = [NSPredicate predicateWithFormat:#"mediaType == %d",PHAssetMediaTypeImage];
options.sortDescriptors = #[[NSSortDescriptor sortDescriptorWithKey:#"creationDate" ascending:NO]];
PHFetchResult<PHAsset *> *assets = [PHAsset fetchAssetsInAssetCollection:album options:options];
if(assets.count>0)
{
[assets enumerateObjectsUsingBlock:^(PHAsset * _Nonnull asset, NSUInteger idx, BOOL * _Nonnull stop) {
if(asset!=nil)
{
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFill options:nil resultHandler:^(UIImage *result, NSDictionary *info)
{
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf addlocalNotificationForFilters:result];
// [weakSelf.buttonGalery setImage:result forState:UIControlStateNormal];
});
}];
*stop = YES;
}
else{
[weakSelf getlatestAferSelfie];
}
}];
}
I'm using the photos framework on iOS8.1 and requesting the image data for the asset using requestImageDataForAsset... Most of the time it works and I get the image data and a dictionary containing what you see below. But sometimes the call completes, but the data is nil and the dictionary contains three generic looking entries.
The calls are performed sequentially and on the same thread. It is not specific to any particular image. The error will happen on images I've successfully opened in the past. Has anyone encountered this?
+ (NSData *)retrieveAssetDataPhotosFramework:(NSURL *)urlMedia resolution:(CGFloat)resolution imageOrientation:(ALAssetOrientation*)imageOrientation {
__block NSData *iData = nil;
PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:#[urlMedia] options:nil];
PHAsset *asset = [result firstObject];
PHImageManager *imageManager = [PHImageManager defaultManager];
PHImageRequestOptions *options = [[PHImageRequestOptions alloc]init];
options.synchronous = YES;
options.version = PHImageRequestOptionsVersionCurrent;
#autoreleasepool {
[imageManager requestImageDataForAsset:asset options:options resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {
iData = [imageData copy];
NSLog(#"requestImageDataForAsset returned info(%#)", info);
*imageOrientation = (ALAssetOrientation)orientation;
}];
}
assert(iData.length != 0);
return iData;
}
This is the desired result where I get image data and the dictionary of meta data:
requestImageDataForAsset returned info({
PHImageFileDataKey = <PLXPCShMemData: 0x1702214a0> bufferLength=1753088 dataLength=1749524;
PHImageFileOrientationKey = 1;
PHImageFileSandboxExtensionTokenKey = "6e14948c4d0019fbb4d14cc5e021199f724f0323;00000000;00000000;000000000000001a;com.apple.app-sandbox.read;00000001;01000003;000000000009da80;/private/var/mobile/Media/DCIM/107APPLE/IMG_7258.JPG";
PHImageFileURLKey = "file:///var/mobile/Media/DCIM/107APPLE/IMG_7258.JPG";
PHImageFileUTIKey = "public.jpeg";
PHImageResultDeliveredImageFormatKey = 9999;
PHImageResultIsDegradedKey = 0;
PHImageResultIsInCloudKey = 0;
PHImageResultIsPlaceholderKey = 0;
PHImageResultWantedImageFormatKey = 9999;
})
Here's what I get occasionally. image data is nil. Dictionary contains not so much.
requestImageDataForAsset returned info({
PHImageResultDeliveredImageFormatKey = 9999;
PHImageResultIsDegradedKey = 0;
PHImageResultWantedImageFormatKey = 9999;
})
I had a problem with similar symptoms where requestImageDataForAsset returned nil image data but was also accompanied by a console error message like this:
[Generic] Failed to load image data for asset <PHAsset: 0x13d041940> 87CCAFDC-A0E3-4AC9-AD1C-3F57B897A52E/L0/001 mediaType=1/0, sourceType=2, (113x124), creationDate=2015-06-29 04:56:34 +0000, location=0, hidden=0, favorite=0 with format 9999
In my case, the problem suddenly started happening on a specific device only with assets in iCloud shared albums after upgrading from iOS 10.x to 11.0.3, and since then through to 11.2.5. Thinking that maybe requestImageDataForAsset was trying to use files locally cached in /var/mobile/Media/PhotoData/PhotoCloudSharingData/ (from the info dictionary's PHImageFileURLKey key) and that the cache may be corrupt I thought about how to clear that cache.
Toggling the 'iCloud Photo Sharing' switch in iOS' Settings -> Accounts & Passwords -> iCloud -> Photos seems to have done the trick. requestImageDataForAsset is now working for those previously failing assets.
Update 9th March 2018
I can reproduce this problem now. It seems to occur after restoring a backup from iTunes:
Use the iOS app and retrieve photos from an iCloud shared album.
Backup the iOS device using iTunes.
Restore the backup using iTunes.
Using the app again to retrieve the same photos from the iCloud shared album now fails with the above console message.
Toggling the 'iCloud Photo Sharing' switch fixes it still. Presumably the restore process somehow corrupts some cache. I've reported it as Bug 38290463 to Apple.
You are likely iterating through an array, and memory is not freed timely, you can try the below code. Make sure theData is marked by __block.
#autoreleasepool {
[imageManager requestImageDataForAsset:asset options:options resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {
NSLog(#"requestImageDataForAsset returned info(%#)", info);
theData = [imageData copy];
}];
}
Getting back to this after a long while, I have solved a big part of my problem. No mystery, just bad code:
PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:#[urlMedia] options:nil];
PHAsset *asset = [result firstObject];
if (asset != nil) { // the fix
PHImageManager *imageManager = [PHImageManager defaultManager];
PHImageRequestOptions *options = [[PHImageRequestOptions alloc]init];
...
}
The most common cause for me was a problem with the media URL passed to fetchAssetsWithALAssetURLs causing asset to be nil and requestImageDataForAsset return a default info object.
The following code maybe help. I think the class PHImageRequestOptions has a bug, so I pass nil , and then fix the bug.
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
[[PHImageManager defaultManager] requestImageDataForAsset:asset options:nil resultHandler:^(NSData * _Nullable imageData, NSString * _Nullable dataUTI, UIImageOrientation orientation, NSDictionary * _Nullable info) {
assetModel.size = imageData.length;
NSString *filename = [asset valueForKey:#"filename"];
assetModel.fileName = filename;
dispatch_semaphore_signal(sema);
}];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
More specifically, how can you know whether a PHAsset has current version of the underlying asset different than the original?
My user should only need to choose between the current or original asset when necessary. And then I need their answer for PHImageRequestOptions.version.
As of iOS 16, PHAsset has a hasAdjustments property which indicates if the asset has been edited.
For previous releases, you can get an array of data resources for a given asset via PHAssetResource API - it will have an adjustment data resource if that asset has been edited.
let isEdited = PHAssetResource.assetResources(for: asset).contains(where: { $0.type == .adjustmentData })
Note that if you want to actually work with a resource file, you have to fetch its data using a PHAssetResourceManager API. Also note that this method returns right away - there's no waiting for an async network request, unlike other answers here.
I have found two ways of checking PHAsset for modifications.
- (void)tb_checkForModificationsWithEditingInputMethodCompletion:(void (^)(BOOL))completion {
PHContentEditingInputRequestOptions *options = [PHContentEditingInputRequestOptions new];
options.canHandleAdjustmentData = ^BOOL(PHAdjustmentData *adjustmentData) { return YES; };
[self requestContentEditingInputWithOptions:options completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
if (completion) completion(contentEditingInput.adjustmentData != nil);
}];
}
- (void)tb_checkForModificationsWithAssetPathMethodCompletion:(void (^)(BOOL))completion {
PHVideoRequestOptions *options = [PHVideoRequestOptions new];
options.deliveryMode = PHVideoRequestOptionsDeliveryModeFastFormat;
[[PHImageManager defaultManager] requestAVAssetForVideo:self options:options resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
if (completion) completion([[asset description] containsString:#"/Mutations/"]);
}];
}
EDIT: I was at the point where I needed the same functionality for PHAsset with an image. I used this:
- (void)tb_checkForModificationsWithAssetPathMethodCompletion:(void (^)(BOOL))completion {
[self requestContentEditingInputWithOptions:nil completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
NSString *path = (contentEditingInput.avAsset) ? [contentEditingInput.avAsset description] : contentEditingInput.fullSizeImageURL.path;
completion([path containsString:#"/Mutations/"]);
}];
}
Take a look at PHImageRequestOptionsVersion
PHImageRequestOptionsVersionCurrent
Request the most recent version of the image asset (the one that reflects all edits).
The resulting image is the rendered output from all previously made adjustments.
PHImageRequestOptionsVersionUnadjusted
Request a version of the image asset without adjustments.
If the asset has been edited, the resulting image reflects the state of the asset before any edits were performed.
PHImageRequestOptionsVersionOriginal
Request the original, highest-fidelity version of the image asset. The
resulting image is originally captured or imported version of the
asset, regardless of any edits made.
If you ask user before retrieving assets, you know which version user specified. If you get a phasset from elsewhere, you can do a revertAssetContentToOriginal to get the original asset. And PHAsset has modificationDate and creationDate properties, you can use this to tell if a PHAsset is modified.
I found this code the only one working for now, and it handles most of the edge cases. It may not be the fastest one but works well for most images types. It takes the smallest possible original and modified image and compare their data content.
#implementation PHAsset (Utilities)
- (void)checkEditingHistoryCompletion:(void (^)(BOOL edited))completion
{
PHImageManager *manager = [PHImageManager defaultManager];
CGSize compareSize = CGSizeMake(64, 48);
PHImageRequestOptions *requestOptions = [PHImageRequestOptions new];
requestOptions.synchronous = YES;
requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeFastFormat;
requestOptions.version = PHImageRequestOptionsVersionOriginal;
[manager requestImageForAsset:self
targetSize:compareSize
contentMode:PHImageContentModeAspectFit
options:requestOptions
resultHandler:^(UIImage *originalResult, NSDictionary *info) {
UIImage *currentImage = originalResult;
requestOptions.version = PHImageRequestOptionsVersionCurrent;
[manager requestImageForAsset:self
targetSize:currentImage.size
contentMode:PHImageContentModeAspectFit
options:requestOptions
resultHandler:^(UIImage *currentResult, NSDictionary *info) {
NSData *currData = UIImageJPEGRepresentation(currentResult, 0.1);
NSData *orgData = UIImageJPEGRepresentation(currentImage, 0.1);
if (completion) {
//handle case when both images cannot be retrived it also mean no edition
if ((currData == nil) && (orgData == nil)) {
completion(NO);
return;
}
completion(([currData isEqualToData:orgData] == NO));
}
}];
}];
}
#end
I can request a video PHAsset using the Photos framework in iOS8. I'd like to know how big the file is on disk. There doesn't seem to be a property of PHAsset to determine that. Does anyone have a solution? (Using Photos framework not required)
Edit
As for iOS 9.3, using requestImageDataForAsset on a video type PHAsset will result in an image, which is the first frame of the video, so it doesn't work anymore. Use the following method instead, for normal video, request option can be nil, but for slow motion video, PHVideoRequestOptionsVersionOriginal needs to be set.
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHVideoRequestOptionsVersionOriginal;
[[PHImageManager defaultManager] requestAVAssetForVideo:asset options:options resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
if ([asset isKindOfClass:[AVURLAsset class]]) {
AVURLAsset* urlAsset = (AVURLAsset*)asset;
NSNumber *size;
[urlAsset.URL getResourceValue:&size forKey:NSURLFileSizeKey error:nil];
NSLog(#"size is %f",[size floatValue]/(1024.0*1024.0)); //size is 43.703005
}
}];
//original answer
For PHAsset, use this:
[[PHImageManager defaultManager] requestImageDataForAsset:asset options:nil resultHandler:^(NSData *imageData, NSString *dataUTI, UIImageOrientation orientation, NSDictionary *info) {
float imageSize = imageData.length;
//convert to Megabytes
imageSize = imageSize/(1024*1024);
NSLog(#"%f",imageSize);
}];
For ALAsset:
ALAssetRepresentation *rep = [asset defaultRepresentation];
float imageSize = rep.size/(1024.0*1024.0);
I tested on one video asset, PHAsset shows the size as 43.703125, ALAsset shows the size as 43.703005.
Edit
For PHAsset, another way to get file size. But as #Alfie Hanssen mentioned, it works on normal video, for slow motion video, the following method will return a AVComposition asset in the block, so I added the check for its type. For slow motion video, use the requestImageDataForAsset method.
[[PHImageManager defaultManager] requestAVAssetForVideo:asset options:nil resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {
if ([asset isKindOfClass:[AVURLAsset class]]) {
AVURLAsset* urlAsset = (AVURLAsset*)asset;
NSNumber *size;
[urlAsset.URL getResourceValue:&size forKey:NSURLFileSizeKey error:nil];
NSLog(#"size is %f",[size floatValue]/(1024.0*1024.0)); //size is 43.703005
NSData *data = [NSData dataWithContentsOfURL:urlAsset.URL];
NSLog(#"length %f",[data length]/(1024.0*1024.0)); // data size is 43.703005
}
}];
Swift version with file size formatting:
let options = PHVideoRequestOptions()
options.version = .original
PHImageManager.default().requestAVAsset(forVideo: asset, options: options) { avAsset, _, _ in
if let urlAsset = avAsset as? AVURLAsset { // Could be AVComposition class
if let resourceValues = try? urlAsset.url.resourceValues(forKeys: [.fileSizeKey]),
let fileSize = resourceValues.fileSize {
let formatter = ByteCountFormatter()
formatter.countStyle = .file
let string = formatter.string(fromByteCount: Int64(fileSize))
print(string)
}
}
}
You heave pretty high chance, that video you want to know is's size is not type of AVURLAsset. But it's ok that under the hood there are more files that your video is composited of (for example raw samples, slow-mo time ranges, filters, etc...), because you want to know size of a concrete playable file. I'm not sure how estimated file size meets reality in this case, but this is how it should be done:
PHImageManager.defaultManager().requestExportSessionForVideo(asset, options: nil, exportPreset: AVAssetExportPresetHighestQuality, resultHandler: { (assetExportSession, info) -> Void in // Here you set values that specifies your video (original, after edit, slow-mo, ...) and that affects resulting size.
assetExportSession.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeMakeWithSeconds(asset.duration, 30)) // Time interval is default from zero to infinite so it needs to be set prior to file size computations. Time scale is I believe (it is "only" preferred value) not important in this case.
let HERE_YOU_ARE = assetExportSession.estimatedOutputFileLength
})