Cutting video on iPhone - ios

Question

I have a video file from the device camera -- stored as /private/var/mobile/Media/DCIM/100APPLE/IMG_0203.MOV, for example, and I need to cut the first 10 seconds of this video. What API or libraries I can use?

Answer 1

I found solution with standard API: AVAssetExportSession
- (void)getTrimmedVideoForFile:(NSString *)filePath withInfo:(NSArray *)info
{
//[[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:[NSURL fileURLWithPath:filePath] options:nil];
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetLowQuality];
// NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSAllDomainsMask, YES);
// NSString *outputURL = paths[0];
NSFileManager *manager = [NSFileManager defaultManager];
// [manager createDirectoryAtPath:outputURL withIntermediateDirectories:YES attributes:nil error:nil];
// outputURL = [outputURL stringByAppendingPathComponent:#"output.mp4"];
NSString *outputURL = [NSString stringWithFormat:#"/tmp/%#.mp4", [info objectAtIndex:2]];
NSLog(#"OUTPUT: %#", outputURL);
// Remove Existing File
// [manager removeItemAtPath:outputURL error:nil];
if (![manager fileExistsAtPath:outputURL]) {
exportSession.outputURL = [NSURL fileURLWithPath:outputURL];
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTime start = kCMTimeZero;
CMTime duration = kCMTimeIndefinite;
if ([[NSString stringWithFormat:#"%#", [info objectAtIndex:3]] floatValue] > 20.0) {
start = CMTimeMakeWithSeconds(1.0, 600);
duration = CMTimeMakeWithSeconds(10.0, 600);
}
CMTimeRange range = CMTimeRangeMake(start, duration);
exportSession.timeRange = range;
[exportSession exportAsynchronouslyWithCompletionHandler:^(void) {
switch (exportSession.status) {
case AVAssetExportSessionStatusCompleted:
NSLog(#"Export Complete %d %#", exportSession.status, exportSession.error);
[self sendVideoPreview:info];
break;
case AVAssetExportSessionStatusFailed:
NSLog(#"Failed:%#",exportSession.error);
// [self addToDelayed:info withAction:#"add"];
break;
case AVAssetExportSessionStatusCancelled:
NSLog(#"Canceled:%#",exportSession.error);
// [self addToDelayed:info withAction:#"add"];
break;
default:
break;
}
}];
} else {
[self sendVideoPreview:info];
}