1.获取视频路径
2.创建压缩视频类
.h文件
import <Foundation/Foundation.h>
import <AVFoundation/AVFoundation.h>
@interface DdcompressVideo : NSObject
/**
- 压缩成功Block
- @param resultPath 返回压缩成功的视频路径
/
typedef void (^CompressionSuccessBlock)(NSString resultPath,float memorySize); // 定义成功的Block 函数
/ - method Comperssion Video 压缩视频的方法, 该方法将压缩过的视频保存到沙河文件, 如果压缩过的视频不需要再进行保留, 可调用 removeCompressedVideoFromDocuments 方法, 将其删除即可
- @param url SourceVideoURL 被压缩视频的URL
- @param compressionType 压缩可选类型
AVAssetExportPresetLowQuality
AVAssetExportPresetMediumQuality
AVAssetExportPresetHighestQuality
AVAssetExportPreset640x480
AVAssetExportPreset960x540
AVAssetExportPreset1280x720
AVAssetExportPreset1920x1080
AVAssetExportPreset3840x2160
返回压缩后的视频路径
*/
- (void)compressedVideoOtherMethodWithURL:(NSURL *)url compressionType:(NSString *)compressionType compressionResultPath:(CompressionSuccessBlock)resultPathBlock;
/**
- 获取视频的大小
- @return 返回视频的大小 float 类型
*/
- (float)countVideoTotalMemorySizeWithURL:(NSURL *)url;
/**
- 清楚沙盒文件中, 压缩后的视频所有
*/
- (void)removeCompressedVideoFromDocuments;
@end
3。 。m文件
import "DdcompressVideo.h"
define CompressionVideoPaht [NSHomeDirectory() stringByAppendingFormat:@"/Documents/CompressionVideoField"]
@implementation DdcompressVideo
-
(void)compressedVideoOtherMethodWithURL:(NSURL *)url compressionType:(NSString *)compressionType compressionResultPath:(CompressionSuccessBlock)resultPathBlock {
NSString *resultPath;
NSData *data = [NSData dataWithContentsOfURL:url];
CGFloat totalSize = (float)data.length / 1024 / 1024;
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:url options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
// 所支持的压缩格式中是否有 所选的压缩格式
if ([compatiblePresets containsObject:compressionType]) {AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:compressionType]; NSDateFormatter *formater = [[NSDateFormatter alloc] init];//用时间给文件全名，以免重复，在测试的时候其实可以判断文件是否存在若存在，则删除，重新生成文件即可 [formater setDateFormat:@"yyyy-MM-dd-HH:mm:ss"]; NSFileManager *manager = [NSFileManager defaultManager]; BOOL isExists = [manager fileExistsAtPath:CompressionVideoPaht]; if (!isExists) { [manager createDirectoryAtPath:CompressionVideoPaht withIntermediateDirectories:YES attributes:nil error:nil]; } resultPath = [CompressionVideoPaht stringByAppendingPathComponent:[NSString stringWithFormat:@"outputJFVideo-%@.mov", [formater stringFromDate:[NSDate date]]]]; NSLog(@"压缩文件路径 resultPath = %@",resultPath); exportSession.outputURL = [NSURL fileURLWithPath:resultPath]; exportSession.outputFileType = AVFileTypeMPEG4; exportSession.shouldOptimizeForNetworkUse = YES; [exportSession exportAsynchronouslyWithCompletionHandler:^(void) { if (exportSession.status == AVAssetExportSessionStatusCompleted) { NSData *data = [NSData dataWithContentsOfFile:resultPath]; float memorySize = (float)data.length / 1024 / 1024; NSLog(@"视频压缩后大小 %f", memorySize); resultPathBlock (resultPath, memorySize); } else { NSLog(@"压缩失败"); } }];} else {
// JFLog(@"不支持 %@ 格式的压缩", compressionType);
}
}
(float)countVideoTotalMemorySizeWithURL:(NSURL *)url {
NSData *data = [NSData dataWithContentsOfURL:url];
CGFloat totalSize = (float)data.length / 1024 / 1024;
return totalSize;
}(void)removeCompressedVideoFromDocuments {
NSFileManager *manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:CompressionVideoPaht]) {
[[NSFileManager defaultManager] removeItemAtPath:CompressionVideoPaht error:nil];
}
}
@end
4.调用
