ALAssetsLibrary *library = [[ALAssetsLibrary alloc]init];
[library enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
[group setAssetsFilter:[ALAssetsFilter allVideos]];
if (group.numberOfAssets > 0)
{
NSIndexSet *videoSet = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, group.numberOfAssets)];
[group enumerateAssetsAtIndexes:videoSet options:0 usingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
ALAssetRepresentation *representation = [result defaultRepresentation];
NSString *savingPath = [NSHomeDirectory() stringByAppendingFormat:@"/Documents/%@",representation.filename];
[[NSFileManager defaultManager]createFileAtPath:savingPath contents:nil attributes:nil];
NSFileHandle *writingHandle = [NSFileHandle fileHandleForWritingAtPath:savingPath];
int bufferSize = 1024;
uint8_t buffer[bufferSize];
unsigned long long read = 0,length = 0;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
int n = 0;
for (;read < representation.size;)
{
if (n % 10 == 0)
{
[pool release];
pool = nil;
pool = [[NSAutoreleasePool alloc]init];
}
length = [representation getBytes:buffer fromOffset:read length:bufferSize error:nil];
read += length;
NSData *fileData = [NSData dataWithBytes:(const void *)buffer length:(NSUInteger)length];
[writingHandle writeData:fileData];
n++;
}
[writingHandle closeFile];
[pool drain];
}];
}
} failureBlock:^(NSError *error) {
}];