iOS 视频转码处理
2024-05-18 02:07:28
前言
苹果手机录制的视频在非Safari浏览器和安卓机器上面都无法直接播放，原因是因为直接录制的视频默认是mov格式，这是需要转换一下格式来处理
其中包含多种转码方式
[KJVideoFileTypeMov] = @".mov",
[KJVideoFileTypeMp4] = @".mp4",
[KJVideoFileTypeWav] = @".wav",
[KJVideoFileTypeM4v] = @".m4v",
[KJVideoFileTypeM4a] = @".m4a",
[KJVideoFileTypeCaf] = @".caf",
[KJVideoFileTypeAif] = @".aif",
[KJVideoFileTypeMp3] = @".mp3",
这里提供一套视频转码的工具
简单调用
/// 视频格式转换处理
+ (void)kj_videoConvertEncodeInfo:(KJVideoEncodeInfo*(^)(KJVideoEncodeInfo*info))infoblock Block:(kVideoEncodeBlock)block;
KJVideoEncodeInfo传入相对应的参数即可
简单直接上代码
#import <Foundation/Foundation.h>
#import <Photos/Photos.h>
typedef NS_ENUM(NSInteger, KJExportPresetQualityType) {KJExportPresetQualityTypeLowQuality = 0, //低质量 可以通过移动网络分享KJExportPresetQualityTypeMediumQuality, //中等质量 可以通过WIFI网络分享KJExportPresetQualityTypeHighestQuality, //高等质量KJExportPresetQualityType640x480,KJExportPresetQualityType960x540,KJExportPresetQualityType1280x720,KJExportPresetQualityType1920x1080,KJExportPresetQualityType3840x2160,
};
typedef NS_ENUM(NSInteger, KJVideoFileType) {KJVideoFileTypeMov = 0, /// .movKJVideoFileTypeMp4, /// .mp4KJVideoFileTypeWav,KJVideoFileTypeM4v,KJVideoFileTypeM4a,KJVideoFileTypeCaf,KJVideoFileTypeAif,KJVideoFileTypeMp3,
};
static NSString * const _Nonnull KJVideoFileTypeStringMap[] = {[KJVideoFileTypeMov] = @".mov",[KJVideoFileTypeMp4] = @".mp4",[KJVideoFileTypeWav] = @".wav",[KJVideoFileTypeM4v] = @".m4v",[KJVideoFileTypeM4a] = @".m4a",[KJVideoFileTypeCaf] = @".caf",[KJVideoFileTypeAif] = @".aif",[KJVideoFileTypeMp3] = @".mp3",
};
typedef void(^kVideoEncodeBlock)(NSURL * _Nullable mp4URL, NSError * _Nullable error);
NS_ASSUME_NONNULL_BEGIN
@interface KJVideoEncodeInfo : NSObject
@property(nonatomic,strong)NSString *videoName;
@property(nonatomic,strong)NSString *videoPath;
@property(nonatomic,assign)KJExportPresetQualityType qualityType;
@property(nonatomic,assign)KJVideoFileType videoType; /// 视频转换格式，默认.mp4
/// URL、PHAsset、AVURLAsset互斥三者选其一
@property(nonatomic,strong)PHAsset *PHAsset;
@property(nonatomic,strong)NSURL *URL;
@property(nonatomic,strong)AVURLAsset *AVURLAsset;
/// 获取导出质量
+ (NSString * const)getAVAssetExportPresetQuality:(KJExportPresetQualityType)qualityType;
/// 获取导出格式
+ (NSString * const)getVideoFileType:(KJVideoFileType)videoType;
@end
@interface KJVideoEncodeTool : NSObject
/// 视频格式转换处理
+ (void)kj_videoConvertEncodeInfo:(KJVideoEncodeInfo*(^)(KJVideoEncodeInfo*info))infoblock Block:(kVideoEncodeBlock)block;
@endNS_ASSUME_NONNULL_END
#import "KJVideoEncodeTool.h"
@implementation KJVideoEncodeInfo
- (instancetype)init{if (self==[super init]) {self.qualityType = KJExportPresetQualityTypeHighestQuality;self.videoType = KJVideoFileTypeMp4;}return self;
}
/// 获取导出质量
+ (NSString * const)getAVAssetExportPresetQuality:(KJExportPresetQualityType)qualityType{switch (qualityType) {case KJExportPresetQualityTypeLowQuality:return AVAssetExportPresetLowQuality;case KJExportPresetQualityTypeMediumQuality:return AVAssetExportPresetMediumQuality;case KJExportPresetQualityTypeHighestQuality:return AVAssetExportPresetHighestQuality;case KJExportPresetQualityType640x480:return AVAssetExportPreset640x480;case KJExportPresetQualityType960x540:return AVAssetExportPreset960x540;case KJExportPresetQualityType1280x720:return AVAssetExportPreset1280x720;case KJExportPresetQualityType1920x1080:return AVAssetExportPreset1920x1080;case KJExportPresetQualityType3840x2160:return AVAssetExportPreset3840x2160;}
}
/// 获取导出格式
+ (NSString * const)getVideoFileType:(KJVideoFileType)videoType{switch (videoType) {case KJVideoFileTypeMov:return AVFileTypeQuickTimeMovie;case KJVideoFileTypeMp4:return AVFileTypeMPEG4;case KJVideoFileTypeWav:return AVFileTypeWAVE;case KJVideoFileTypeM4v:return AVFileTypeAppleM4V;case KJVideoFileTypeM4a:return AVFileTypeAppleM4A;case KJVideoFileTypeCaf:return AVFileTypeCoreAudioFormat;case KJVideoFileTypeAif:return AVFileTypeAIFF;case KJVideoFileTypeMp3:return AVFileTypeMPEGLayer3;}
}
@end
@implementation KJVideoEncodeTool
+ (void)kj_videoConvertEncodeInfo:(KJVideoEncodeInfo*(^)(KJVideoEncodeInfo*))infoblock Block:(kVideoEncodeBlock)block{KJVideoEncodeInfo *info = [KJVideoEncodeInfo new];if (infoblock) info = infoblock(info);__block NSString *presetName = [KJVideoEncodeInfo getAVAssetExportPresetQuality:info.qualityType];__block NSString *videoType = [KJVideoEncodeInfo getVideoFileType:info.videoType];NSString *suffix = KJVideoFileTypeStringMap[info.videoType];if (![info.videoName hasSuffix:suffix]) {info.videoName = [info.videoName stringByAppendingString:suffix];}if (info.URL == nil && info.PHAsset == nil && info.AVURLAsset == nil) {NSError *error = [self kj_setErrorCode:10008 DescriptionKey:@"Lack of material"];block(nil, error);}else if (info.URL) {AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:info.URL options:nil];[self convertAVURLAsset:avAsset Name:info.videoName Path:info.videoPath FileType:videoType PresetName:presetName Block:block];}else if (info.AVURLAsset) {[self convertAVURLAsset:info.AVURLAsset Name:info.videoName Path:info.videoPath FileType:videoType PresetName:presetName Block:block];}else if (info.PHAsset) {__block NSString *name = info.videoName;__block NSString *path = info.videoPath;PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];options.version = PHImageRequestOptionsVersionCurrent;options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;options.networkAccessAllowed = true;PHImageManager *manager = [PHImageManager defaultManager];[manager requestAVAssetForVideo:info.PHAsset options:options resultHandler:^(AVAsset *asset, AVAudioMix *audioMix, NSDictionary *info) {if ([asset isKindOfClass:[AVURLAsset class]]) {[self convertAVURLAsset:(AVURLAsset*)asset Name:name Path:path FileType:videoType PresetName:presetName Block:block];}else{NSError *error = [self kj_setErrorCode:10008 DescriptionKey:@"PHAsset error"];block(nil, error);}}];}
}
#pragma mark - MOV转码MP4
+ (void)convertAVURLAsset:(AVURLAsset*)asset Name:(NSString*)name Path:(NSString*)path FileType:(NSString*)fileType PresetName:(NSString*)presetName Block:(kVideoEncodeBlock)block{AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:asset.URL options:nil];NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];if ([compatiblePresets containsObject:presetName]) {NSFileManager *fileManager = [NSFileManager defaultManager];BOOL isDirectory = FALSE;BOOL isDirExist = [fileManager fileExistsAtPath:path isDirectory:&isDirectory];if(!(isDirExist && isDirectory)) [fileManager createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];NSString *resultPath = path;if (![path hasSuffix:name]) resultPath = [path stringByAppendingFormat:@"/%@",name];AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:avAsset presetName:presetName];exportSession.outputURL = [NSURL fileURLWithPath:resultPath];exportSession.outputFileType = fileType;exportSession.shouldOptimizeForNetworkUse = YES;[exportSession exportAsynchronouslyWithCompletionHandler:^(void) {switch (exportSession.status) {case AVAssetExportSessionStatusUnknown:case AVAssetExportSessionStatusWaiting:case AVAssetExportSessionStatusExporting:case AVAssetExportSessionStatusFailed:case AVAssetExportSessionStatusCancelled:{NSString *key = [self kj_getDescriptionKey:exportSession.status];NSError *error = [self kj_setErrorCode:exportSession.status+10001 DescriptionKey:key];block(nil,error);}break;case AVAssetExportSessionStatusCompleted:block(exportSession.outputURL,nil);break;}}];}else{NSError *error = [self kj_setErrorCode:10007 DescriptionKey:@"AVAssetExportSessionStatusNoPreset"];block(nil, error);}
}
+ (NSString*)kj_getDescriptionKey:(AVAssetExportSessionStatus)status{switch (status) {case AVAssetExportSessionStatusUnknown:return @"AVAssetExportSessionStatusUnknown";case AVAssetExportSessionStatusWaiting:return @"AVAssetExportSessionStatusWaiting";case AVAssetExportSessionStatusExporting:return @"AVAssetExportSessionStatusExporting";case AVAssetExportSessionStatusCompleted:return @"AVAssetExportSessionStatusCompleted";case AVAssetExportSessionStatusFailed:return @"AVAssetExportSessionStatusFailed";case AVAssetExportSessionStatusCancelled:return @"AVAssetExportSessionStatusCancelled";}
}
+ (NSError*)kj_setErrorCode:(NSInteger)code DescriptionKey:(NSString*)key{return [NSError errorWithDomain:@"ConvertErrorDomain" code:code userInfo:@{NSLocalizedDescriptionKey:key}];
}
+ (NSDictionary*)getVideoInfo:(PHAsset*)asset{PHAssetResource * resource = [[PHAssetResource assetResourcesForAsset: asset] firstObject];NSMutableArray *resourceArray = nil;if (@available(iOS 13.0, *)) {NSString *string1 = [resource.description stringByReplacingOccurrencesOfString:@" - " withString:@" "];NSString *string2 = [string1 stringByReplacingOccurrencesOfString:@": " withString:@"="];NSString *string3 = [string2 stringByReplacingOccurrencesOfString:@"{" withString:@""];NSString *string4 = [string3 stringByReplacingOccurrencesOfString:@"}" withString:@""];NSString *string5 = [string4 stringByReplacingOccurrencesOfString:@", " withString:@" "];resourceArray = [NSMutableArray arrayWithArray:[string5 componentsSeparatedByString:@" "]];[resourceArray removeObjectAtIndex:0];[resourceArray removeObjectAtIndex:0];}else {NSString *string1 = [resource.description stringByReplacingOccurrencesOfString:@"{" withString:@""];NSString *string2 = [string1 stringByReplacingOccurrencesOfString:@"}" withString:@""];NSString *string3 = [string2 stringByReplacingOccurrencesOfString:@", " withString:@","];resourceArray = [NSMutableArray arrayWithArray:[string3 componentsSeparatedByString:@" "]];[resourceArray removeObjectAtIndex:0];[resourceArray removeObjectAtIndex:0];}NSMutableDictionary *videoInfo = [[NSMutableDictionary alloc] init];for (NSString *string in resourceArray) {NSArray *array = [string componentsSeparatedByString:@"="];videoInfo[array[0]] = array[1];}videoInfo[@"duration"] = @(asset.duration).description;return videoInfo;
}@end
使用示例
#import "KJVideoEncodeVC.h"
#import <AssetsLibrary/AssetsLibrary.h>
#import <MobileCoreServices/MobileCoreServices.h>
#import <AVFoundation/AVFoundation.h>
#import "KJVideoEncodeTool.h"
@interface KJVideoEncodeVC ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>@end@implementation KJVideoEncodeVC- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view._weakself;UIButton *button = [UIButton buttonWithType:(UIButtonTypeCustom)];[button setTitle:@"拍摄视频" forState:(UIControlStateNormal)];[button setTitleColor:UIColor.blueColor forState:(UIControlStateNormal)];button.frame = CGRectMake(0, 0, 100, 30);[self.view addSubview:button];button.center = self.view.center;[button kj_addAction:^(UIButton * _Nonnull kButton) {UIImagePickerController *pickerCon = [[UIImagePickerController alloc]init];pickerCon.sourceType = UIImagePickerControllerSourceTypeCamera;pickerCon.mediaTypes = @[(NSString*)kUTTypeMovie];//设定相机为视频pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceRear;//设置相机后摄像头pickerCon.videoMaximumDuration = 5;//最长拍摄时间pickerCon.videoQuality = UIImagePickerControllerQualityTypeIFrame1280x720;//拍摄质量pickerCon.allowsEditing = NO;//是否可编辑pickerCon.delegate = weakself;[weakself presentViewController:pickerCon animated:YES completion:nil];}];UIButton *button2 = [UIButton buttonWithType:(UIButtonTypeCustom)];[button2 setTitle:@"转换视频" forState:(UIControlStateNormal)];[button2 setTitleColor:UIColor.blueColor forState:(UIControlStateNormal)];button2.frame = CGRectMake(0, 0, 100, 30);[self.view addSubview:button2];button2.center = self.view.center;button2.centerY += 50;[button2 kj_addAction:^(UIButton * _Nonnull kButton) {UIImagePickerController *pickerController = [[UIImagePickerController alloc]init];pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;pickerController.mediaTypes = @[(NSString*)kUTTypeMovie];pickerController.allowsEditing = NO;pickerController.delegate = weakself;[weakself presentViewController:pickerController animated:YES completion:nil];}];
}- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];[picker dismissViewControllerAnimated:YES completion:nil];NSString *mediaType = info[UIImagePickerControllerMediaType];if ([mediaType isEqualToString:(NSString*)kUTTypeImage]) {if (image!=nil) {NSURL *imageURL = [info objectForKey:UIImagePickerControllerReferenceURL];NSLog(@"URL:%@",imageURL);NSData * imageData = UIImageJPEGRepresentation(image,0.1);NSLog(@"压缩到0.1的图片大小:%lu",[imageData length]);}}else if([mediaType isEqualToString:(NSString*)kUTTypeMovie]){NSLog(@"进入视频环节!!!");NSURL *URL = info[UIImagePickerControllerMediaURL];NSData *file = [NSData dataWithContentsOfURL:URL];NSLog(@"输出视频的大小:%lu",(unsigned long)[file length]);NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject] stringByAppendingPathComponent:@"Cache/VideoData"];NSTimeInterval now = [[NSDate date] timeIntervalSince1970];NSDateFormatter * formatter = [[NSDateFormatter alloc] init];[formatter setDateFormat:@"yyyyMMddHHmmssSSS"];NSDate * NowDate = [NSDate dateWithTimeIntervalSince1970:now];NSString * timeStr = [formatter stringFromDate:NowDate];[KJVideoEncodeTool kj_videoConvertEncodeInfo:^KJVideoEncodeInfo * _Nonnull(KJVideoEncodeInfo * _Nonnull info) {info.URL = URL;info.videoName = timeStr;info.videoPath = path;return info;} Block:^(NSURL * _Nullable mp4URL, NSError * _Nullable error) {NSLog(@"--%@",mp4URL);ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];[assetLibrary writeVideoAtPathToSavedPhotosAlbum:mp4URL completionBlock:^(NSURL *assetURL, NSError *error){}];}];}
}- (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker {[picker dismissViewControllerAnimated:YES completion:^{}];NSLog(@"视频录制取消了...");
}@end
备注：本文用到的部分函数方法和Demo，均来自三方库**KJExtensionHandler**，如有需要的朋友可自行pod 'KJExtensionHandler'引入即可
视频转码处理介绍就到此完毕，后面有相关再补充，写文章不容易，还请点个**小星星**传送门
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