Use AVAssetExportSession and save in custom album - ios

Question

How can I export video using AVAssetExportSession and save result video in a custom album, for example My Own Videos?

Answer 1

First you need to create a folder:
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
NSString *folderName = #"My Own Videos";
[library addAssetsGroupAlbumWithName:folderName
resultBlock:^(ALAssetsGroup *group)
{
NSLog(#"Added folder:%#", folderName);
}
failureBlock:^(NSError *error)
{
NSLog(#"Error adding folder");
}];
Then, find the folder:
__block ALAssetsGroup* folder;
[library enumerateGroupsWithTypes:ALAssetsGroupAlbum
usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if ([[group valueForProperty:ALAssetsGroupPropertyName] isEqualToString:folderName])
{
folder = group;
}
}
failureBlock:^(NSError* error)
{
// Error handling.
}];
And add your video to it. Save the asset to Library:
AVURLAsset *videoAsset = ...
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:videoAsset
presetName:AVAssetExportPreset1280x720];
exportSession.outputURL = [[NSFileManager defaultManager] URLForInterviewWithFileName:newFileName];
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{ ...
And put it into the album:
[folder addAsset:asset];
Hope it helps.

Answer 2

after export session (when you have the url)
-(void)saveVideoUrl:(NSURL*)url toCollection:(NSString *)collectionTitle {
NSLog(#"entered %s", __PRETTY_FUNCTION__);
__block PHFetchResult *photosAsset;
__block PHAssetCollection *collection;
__block PHObjectPlaceholder *placeholder;
// Find the album
PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.predicate = [NSPredicate predicateWithFormat:#"title = %#", collectionTitle];
// this is how we get a match for album Title held by 'collectionTitle'
collection = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:fetchOptions].firstObject;
// check if album exists
if (!collection)
{
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
NSLog(#" Album did not exist, now creating album: %#",collectionTitle);
// Create the album
PHAssetCollectionChangeRequest *createAlbum = [PHAssetCollectionChangeRequest creationRequestForAssetCollectionWithTitle:collectionTitle];
placeholder = [createAlbum placeholderForCreatedAssetCollection];
} completionHandler:^(BOOL didItSucceed, NSError *error) {
if (didItSucceed)
{
PHFetchResult *collectionFetchResult = [PHAssetCollection fetchAssetCollectionsWithLocalIdentifiers:#[placeholder.localIdentifier] options:nil];
collection = collectionFetchResult.firstObject;
}
}];
}
// Save to the album
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
PHAssetChangeRequest *assetRequest = [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:url];
placeholder = [assetRequest placeholderForCreatedAsset];
photosAsset = [PHAsset fetchAssetsInAssetCollection:collection options:nil];
PHAssetCollectionChangeRequest *albumChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:collection assets:photosAsset];
[albumChangeRequest addAssets:#[placeholder]];
} completionHandler:^(BOOL didItSucceed, NSError *error) {
if (didItSucceed)
{ // if YES
NSLog(#" Looks like Image was saved in camera Roll as %#", placeholder.localIdentifier);
NSLog(#"placeholder holds %#", placeholder.debugDescription );
}
else
{
NSLog(#"%#", error);
}
}];
}