NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:self.asset];
if ([compatiblePresets containsObject:AVAssetExportPresetMediumQuality]) {
self.exportSession = [[AVAssetExportSession alloc] initWithAsset:self.asset presetName:AVAssetExportPresetPassthrough];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyyMMddHHmmss";
NSString *str = [formatter stringFromDate:[NSDate date]];
NSString *videoPath = [NSTemporaryDirectory() stringByAppendingFormat:@"%@.mp4",str];
NSURL *furl = [NSURL fileURLWithPath:videoPath];
self.exportSession.outputURL = furl;
self.exportSession.outputFileType = AVFileTypeQuickTimeMovie;
CMTime start = CMTimeMakeWithSeconds(self.startTime, self.asset.duration.timescale);
CMTime duration = CMTimeMakeWithSeconds(self.stopTime - self.startTime, self.asset.duration.timescale);
CMTimeRange range = CMTimeRangeMake(start, duration);
self.exportSession.timeRange = range;
[self.exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([self.exportSession status]) {
case AVAssetExportSessionStatusFailed:
NSLog(@"Export failed: %@", [[self.exportSession error] localizedDescription]);
break;
case AVAssetExportSessionStatusCancelled:
NSLog(@"Export canceled");
break;
default:
NSLog(@"NONE");
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"剪辑成功");
});
break;
}
}];
}
