AliyunCrop
@interface AliyunCrop : NSObject裁剪类
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                  裁剪回调 DeclarationObjective-C @property (nonatomic, weak) id<AliyunCropDelegate> delegate;
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                  视频/音乐源文件路径 必选参数 DeclarationObjective-C @property (nonatomic, copy) NSString *inputPath;
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                  裁剪完成后的文件存放路径 必选参数 如果是多级目录,需要保证目录已经创建完成 DeclarationObjective-C @property (nonatomic, copy) NSString *outputPath;
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                  裁剪后视频分辨率 视频分辨率必须为偶数 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) CGSize outputSize;
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                  截取时间起点 单位:秒 DeclarationObjective-C @property (nonatomic) float startTime;
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                  截取时间终点 单位:秒 DeclarationObjective-C @property (nonatomic) float endTime;
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                  Deprecated deprecated 视频片段过渡动画时间 无效接口,已废弃 DeclarationObjective-C @property (nonatomic) long fadeDuration;
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                  裁剪模式 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) AliyunCropCutMode cropMode;
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                  裁剪的有效区域 保留的视频尺寸 (cropMode为0时 无效) 裁剪音乐时无需设置 单位:像素 DeclarationObjective-C @property (nonatomic) CGRect rect;
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                  视频质量 默认值:AliyunVideoQualityMedium 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) AliyunVideoQuality videoQuality;
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                  帧率 默认:25 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) int fps;
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                  关键帧间隔 默认:5 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) int gop;
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                  编码方式 软编:0 硬编:1 DeclarationObjective-C @property (nonatomic) int encodeMode;
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                  码率 单位:bps 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) int bitrate;
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                  Deprecated deprecated 是否启用gpu裁剪 裁剪音乐时无需设置 DeclarationObjective-C @property (nonatomic) BOOL useHW;
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                  是否开启优化 开启后只裁剪时间将不走编解码 裁剪音乐时无需设置 默认关闭 DeclarationObjective-C @property (nonatomic) BOOL shouldOptimize;
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                  背景颜色 视频填充模式下有效 裁剪音乐时无需设置 DeclarationObjective-C @property(nonatomic, strong) UIColor *fillBackgroundColor
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                  初始化裁剪 DeclarationObjective-C - (instancetype)initWithDelegate:(id<AliyunCropDelegate>)delegate;ParametersdelegateAliyunCropDelegate代理 Return ValueAliyunCrop 
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                  开始裁剪 DeclarationObjective-C - (int)startCrop;
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                  取消裁剪 DeclarationObjective-C - (void)cancel;
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                  Deprecated deprecated 版本号 DeclarationObjective-C + (NSString *)version;Return Value版本号 
 AliyunCrop Class Reference
        AliyunCrop Class Reference