FFmpeg split video files

1. Separate file formats are mov, mp4, m4a, 3gp, 3g2, mj2, etc.

2. The flow chart of separating video files is as follows:

3. File path encapsulation class

  3.1 Header file, PathTool.h

#import "PathTool.h"
#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface PathTool : NSObject

+(NSString *)bundlePath:(NSString *)fileName;

+(NSString *)documentsPath:(NSString *)fileName;

@end

NS_ASSUME_NONNULL_END

  3.2 Implement the header file, PathTool.m

#import "PathTool.h"

@implementation PathTool

/// 应用里资源文件路径
/// - Parameter fileName: 文件名称
+ (NSString *)bundlePath:(NSString *)fileName{
       //[[NSBundle mainBundle]pathForResource:@"test.h264" ofType:nil];
    return [[[NSBundle mainBundle] bundlePath] stringByAppendin