i have a Video file as NSData.how can i write the NSData file as Video in to Photolibrary/SavedPhotosAlbum?
i done it with UIimage through the following code. i had a UiImage as myNsData(NSData)
UIImage *viewImage = [UIImage imageWithData:myNsData];
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
// Request to save the image to camera roll
[library writeImageToSavedPhotosAlbum:[viewImage CGImage] orientation:(ALAssetOrientation)[viewImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
}
how can i do it the same functionality for Video.
i searched in NSData calss .
i found only two ways.
they are
(void)writeVideoAtPathToSavedPhotosAlbum:(NSURL *)videoPathURL completionBlock:(ALAssetsLibraryWriteVideoCompletionBlock)completionBlock;
- (BOOL)videoAtPathIsCompatibleWithSavedPhotosAlbum:(NSURL *)videoPathURL;
two of them are using URL.actually i didn't want to write the NSData file any where except in Photolibrary/SavedPhotosAlbum.
i need to write the NSData file directly in to the Photolibrary/SavedPhotosAlbum like i saved an image.How can do that?can any one Help me?
You need to create an AVAssetWriter with a video AVAssetWriterInput and add your data into the input.
When you create the AVAssetWriter, you need to specify an URL for the asset.
After you can use the ALAssetsLibrary (writeVideoAtPathToSavedPhotosAlbum:completionBlock:) to write the asset to the photo library, with the url of the asset created above.
Related
When using ALAssetsLibrary, I used to save image to photo library with proper exif using the code below:
NSInteger orientation = 2;// Or whatever
NSData *jpegData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
CMSetAttachment(imageDataSampleBuffer, kCGImagePropertyOrientation,
[NSNumber numberWithInt: orientation],
kCMAttachmentMode_ShouldPropagate);
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
CFDictionaryRef attachments = CMCopyDictionaryOfAttachments(kCFAllocatorDefault, imageDataSampleBuffer, kCMAttachmentMode_ShouldPropagate);
[library writeImageDataToSavedPhotosAlbum:jpegData metadata:(id)attachments completionBlock:^(NSURL *assetURL, NSError *error) {
...
...
}
It's not clear how to translate that code when using PHPhotoLibrary. Can anyone provide the right way to save attachments along with the jpeg image?
Use ImageIO to add Metadata to your JPEG/PNG image as described in the following article:
Save the exif metadata using the new PHPhotoLibrary
i am working on a app that generates temporary video from the still image. But i don't want the user to view the temporary file what i have generated. But the moment when the app is generating the video file,the video is listing out by the camera roll.
my Question is How can i generate the temporary media file that could't have access to 'camera roll,iTunes and iCloud'?
please help me. thanks in advance.
Code:
[assetWriter finishWritingWithCompletionHandler:^
{
NSURL *url = _outMovieURL; ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:url
completionBlock:^(NSURL *assetURL, NSError *error)
{
NSLog(#"Done!");
}];
}];
This block:
[assetWriter finishWritingWithCompletionHandler:^
{
NSURL *url = _outMovieURL; ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:url
completionBlock:^(NSURL *assetURL, NSError *error)
{
NSLog(#"Done!");
}];
}];
Is to write file in camera roll. So don't use this while you have only created temporary video. Write that temporary video file in documentDirectory instead, (or probably it's already in documentDirectory, while you are creating it, all you need to do is to not write that file in camera roll with this code).
You should use NSTemporaryDirectory() and append your own affix at the end for any temporary files. Files in that directory will be cleaned by the OS or you can delete right after you are done with it.
I'm putting together a photo gallery program. I's their a way to store the images in my app to the image gallery??? I'v seen sample code to get images using the uiimagepicker, but nothing for storing them in the photo gallery?
You can use the ALAssetsLibrary for saving the image to photoLibrary.
UIImage *saveImage = //your image;
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[saveImage CGImage] orientation:(ALAssetOrientation)[saveImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error)
{
}];
Also you can store image using UIImageWriteToSavedPhotosAlbum() of UIKit.
As H2CO3 stated in the comments, UIImageWriteToSavedPhotosAlbum() is what you're looking for.
Below is the most simple use of this method. You can replace "image" with an image from your photo gallery, any image from your app, etc.
UIImage *image = [UIImage imageNamed:#"image.png"];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
I'm trying to save Images the user takes with the camera
1) If I use the UIImageWriteToSavedPhotosAlbum I can't seem to assign the fileName that I want. How, can you choose the file name?
The nice thing about using this option is
[picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
Then gives a thumbnail gallery of Photo Library directory.
2) which leads me to my next question Can
[picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary]; be used to get images from your own personal directory ?
3) Is there anyway to programmatically create sub folders within the Photo Library
4) Lastly,
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSPicturesDirectory, NSUserDomainMask, YES);
if (![[NSFileManager defaultManager] fileExistsAtPath:[paths objectAtIndex:0] isDirectory:&isDir]) {
NSError *error;
[[NSFileManager defaultManager] createDirectoryAtPath:[paths objectAtIndex:0 withIntermediateDirectories:YES attributes:nil error:&error];
}
Checking to see if the NSPicturesDirectory exists so I can write to it
I keep getting a Cocoa error 513 not permitted
Thanks in advance
You can't assign a file name to photo library images. ios assign a file name called asset url to the images that are saved to the photo library, we can't change that.
If you need to save the images to photo library you can use ALAssetsLibrary
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation) [image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
if (error)
{
// Eror
}
else
{
// Success
}
}];
[library release];
For more information check:
How to save picture to iPhone photo library?
Save image in UIImageView to iPad Photos Library
1.)
To save a filename of your choice, you need to save the image to your documents directory. This can easily be done like so:
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{
NSString *current = [NSString stringWithFormat:#"%#/%#",PHOTODATA_PATH,currentItem];
UIGraphicsBeginImageContext(CGSizeMake(160,160));
[image drawInRect:CGRectMake(0,0,160,160)];
UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * thumbSize = UIImageJPEGRepresentation(scaledImage, 1.0);
[thumbSize writeToFile:[NSString stringWithFormat:#"%#_thumb.jpg",current] atomically:YES];
NSData * fullSize = UIImageJPEGRepresentation(image, 1.0);
[fullSize writeToFile:[NSString stringWithFormat:#"%#.jpg",current] atomically:YES];
[self dismissModalViewControllerAnimated:YES];
}
Of course this code may need to be edited to fit your exact situation but gives the basic understanding and way to save a photo to file using NSData.
2.)
Yes, UIImagePickerControllerSourceTypePhotoLibrary will access your Photo Library on your device. Any photos saved or taken from the camera roll will be accessible using this.
3.)
No, you cannot create subfolders in the Photo Library using your application. This can be done using iPhoto or iTunes or the like.
4.)
You only have access to the Documents and Library paths contained within your sandboxed environment. The only way you can save a photo to the Photo Library is by using the appropriate public methods. There is no need to check if the directory exists, the OS will take care of all of the "behind the scenes" tasks it needs to in order to manage the Photo Library.
I have a NSMutableData containing a JPEG that I want to save in the device library.
I can do it converting it to an UIImage, but then it loses the EXIF data, so UIImaes should be avoided.
EDIT To reflect what I am trying to accomplish
I am using the iphone-exif library to edit the metadata of a picture in my main bundle. I want to save the resulting image in the photo library
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"P1080330" ofType:#"JPG"];
NSData *uiJpeg = [NSData dataWithContentsOfFile:filePath];
EXFJpeg* jpegScanner = [[EXFJpeg alloc] init];
[jpegScanner scanImageData: uiJpeg];
NSLog(#" EXIF_Make %# ", [ jpegScanner.exifMetaData tagValue: [NSNumber numberWithInt:EXIF_Make]]); // OUTPUTS PANASONIC
// Change camera maker to FairyGodmother
[jpegScanner.exifMetaData addTagValue: #"FairyGodmother" forKey:[NSNumber numberWithInt:EXIF_Make]];
NSMutableData *newImageData = [[NSMutableData alloc] init];
[jpegScanner populateImageData:newImageData];
// NOW I HAVE THE NSMUTABLEDATA CONTAINGING MY IMAGE WITH ALL MY EXIF DATA. HOW DO I PUT IT TO THE PHOTO LIBRARY?
UIImageWriteToSavedPhotosAlbum (which takes a UIImage) is the only documented path to getting an image in the device's photo library, as far as I know.
What is your concern with "losing EXIF data"? Are you talking about orientation? (UIImage should take care of that for you.) Or other EXIF data?
The only way you can get an image out of the photo library is as a UIImage also, so I'm not sure what you stand to gain by shoving a raw JPEG stream into the library.
To Write a File use:
[yourImage writeToFile:filePath atomically:YES];
[]'s