昨天一天下午还真是个种查，各种搜索，然后各种技术群，各种问，（没人鸟我），其实我是有这个能力的，怎么就一上来各种查呢？人还是要相信自己的能力，相信自己，这个很重要。
直接说我的问题吧
获取视频路径不对的方法：
先上代码在解释为什么不对。
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHImageRequestOptionsVersionCurrent;
options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
PHImageManager *manager = [PHImageManager defaultManager];
[manager requestAVAssetForVideo:phAsset options:options resultHandler:^(AVAsset * _Nullable asset, AVAudioMix * _Nullable audioMix, NSDictionary * _Nullable info) {
AVURLAsset *urlAsset = (AVURLAsset *)asset;
NSURL *url = urlAsset.URL;
NSData *data = [NSData dataWithContentsOfURL:url];
}];
不对的原因：
错误在AVURLAsset *urlAsset = (AVURLAsset *)asset;这一行代码。
因为asset可能是个基类，他可能是AVComposition而不是AVURLAsset，这样就得不到视频的url了这样程序就会崩啦。
[AVComposition URL]: unrecognized selector sent to instance 0x170830fc0
获得视频路径方法：
NSArray *assetResources = [PHAssetResource assetResourcesForAsset:asset];
PHAssetResource *resource;
for (PHAssetResource *assetRes in assetResources) {
if (assetRes.type == PHAssetResourceTypePairedVideo ||
assetRes.type == PHAssetResourceTypeVideo) {
resource = assetRes;
}
}
if (resource.originalFilename) {
fileName = resource.originalFilename;
}
if (asset.mediaType == PHAssetMediaTypeVideo || asset.mediaSubtypes == PHAssetMediaSubtypePhotoLive) {
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHImageRequestOptionsVersionCurrent;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
NSString *savePath = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
[[PHAssetResourceManager defaultManager]writeDataForAssetResource:resource toFile:[NSURL fileURLWithPath:savePath] options:nil completionHandler:^(NSError * _Nullable error) {
}
对于这个方法只适合在ios9之后，可是我需要的是ios8以后。这个方法可能还有问题这个是网上找的。不过也可以得到图片链接。
最终方法：
这个方法的好处是我上传的视频是多个平台用的，直接都不需要格式转换啦，因为开始导出的时候我就转成MP4啦，这样多完美呀。靠，还是要相信自己，搜他妹的，弄了老半天，时间都耽误了，没有按时完成我的工作。
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHImageRequestOptionsVersionCurrent;
options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
PHImageManager *manager = [PHImageManager defaultManager];
[manager requestExportSessionForVideo:asset options:options exportPreset:AVAssetExportPresetMediumQuality resultHandler:^(AVAssetExportSession * _Nullable exportSession, NSDictionary * _Nullable info)
NSString *savePath = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
exportSession.outputURL = [NSURL fileURLWithPath:savePath];
exportSession.shouldOptimizeForNetworkUse = NO;
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) {
case AVAssetExportSessionStatusFailed:
{
if (failure) {
NSError *e = [exportSession error];
NSLog(@"%@",e);
failure([[exportSession error] localizedDescription]);
}
break;
}
case AVAssetExportSessionStatusCancelled:
{
if (cancell) {
cancell();
}
break;
}
case AVAssetExportSessionStatusCompleted:
{
if (result) {
result(savePath,[savePath lastPathComponent]);
}
break;
}
default:
break;
}
} ];
}];
文件路径之类的方法
//// FileManager.m// PWM//// Created by yrx on 15/4/28.// Copyright (c) 2015年 cre. All rights reserved.//#import "FileUtils.h"#import#import "lame.h"#import "URLCodeUtils.h"#import#import "StringHeader.h"
@implementation FileUtils
//static NSString *_FileCacheDirectory;
//
//+(NSString*) FileCacheDirectory {
//
// if(!_FileCacheDirectory) {
//
// NSString* cachesDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
//
// _FileCacheDirectory = [cachesDirectory stringByAppendingPathComponent:@"FileCache"];
//
// [[NSFileManager defaultManager] createDirectoryAtPath:_FileCacheDirectory withIntermediateDirectories:YES attributes:nil error:nil];
// }
//
// return _FileCacheDirectory;
//}
+(NSString *)rootDirDoc{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *rootDir = [documentsDirectory stringByAppendingPathComponent:RootFileCache];
[[NSFileManager defaultManager] createDirectoryAtPath:rootDir withIntermediateDirectories:YES attributes:nil error:nil];
return rootDir;
}
//获取Library目录
+(NSString *)rootDirLib{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *libraryDirectory = [paths objectAtIndex:0];
NSString *rootDir = [libraryDirectory stringByAppendingPathComponent:RootFileCache];
[[NSFileManager defaultManager] createDirectoryAtPath:rootDir withIntermediateDirectories:YES attributes:nil error:nil];
return rootDir;
}
//获取Cache目录
+(NSString *)rootDirCache{
NSArray *cacPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachePath = [cacPath objectAtIndex:0];
NSString *rootDir = [cachePath stringByAppendingPathComponent:RootFileCache];
[[NSFileManager defaultManager] createDirectoryAtPath:rootDir withIntermediateDirectories:YES attributes:nil error:nil];
return rootDir;
}
//获取Tmp目录
+(NSString *)rootDirTmp{
NSString *tmpDirectory = NSTemporaryDirectory();
NSString *rootDir = [tmpDirectory stringByAppendingPathComponent:RootFileCache];
[[NSFileManager defaultManager] createDirectoryAtPath:rootDir withIntermediateDirectories:YES attributes:nil error:nil];
return rootDir;
}
+(NSString *)getDir:(NSString *)dirName rootDir:(NSString *)rootDir{
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isDir = false;
NSString *dirPath = [rootDir stringByAppendingPathComponent:dirName];
BOOL isDirExist = [fileManager fileExistsAtPath:dirPath isDirectory:&isDir];
if(!(isDirExist && isDir))
{
BOOL createDir = [[NSFileManager defaultManager] createDirectoryAtPath:dirPath withIntermediateDirectories:YES attributes:nil error:nil];;
if(!createDir){
// dirPath = nil;
}
}
return dirPath;
}
+(NSString *)createPathWithFileName:(NSString *)fileName direName:(NSString *)dirName rootDir:(NSString *)rootDir{
NSString *targetDir = [self getDir:dirName rootDir:rootDir];
return [targetDir stringByAppendingPathComponent:[URLCodeUtils decodeString:fileName]];
}
+(NSString *)createPathWithFileName:(NSString *)fileName rootDir:(NSString *)rootDir{
return [self createPathWithFileName:fileName direName:DefautlDir rootDir:rootDir];
}
+(NSString *)createPathWithFileName:(NSString *)fileName{
return [self createPathWithFileName:fileName direName:DefautlDir rootDir:[self rootDirCache]];
}
+(void)enumeratorFiles:(NSString *)path block:(void(^)(NSString *path))block{
// 1.判断文件还是目录
NSFileManager * fileManger = [NSFileManager defaultManager];
BOOL isDir = NO;
BOOL isExist = [fileManger fileExistsAtPath:path isDirectory:&isDir];
if (isExist) {
// 2. 判断是不是目录
if (isDir) {
NSArray * dirArray = [fileManger contentsOfDirectoryAtPath:path error:nil];
NSString * subPath = nil;
for (NSString * str in dirArray) {
subPath = [path stringByAppendingPathComponent:str];
BOOL issubDir = NO;
[fileManger fileExistsAtPath:subPath isDirectory:&issubDir];
[self enumeratorFiles:subPath block:block];
}
}else{
if (block) {
block(path);
}
}
}
}
+(NSMutableArray *)filePathsWithDirPath:(NSString *)dirPath{
NSMutableArray *filePaths = [NSMutableArray new];
if (dirPath) {
[self enumeratorFiles:dirPath block:^(NSString *path) {
[filePaths addObject:path];
}];
}
return filePaths;
}
+(NSMutableArray *)filePathsWithDirName:(NSString *)dirName rootDir:(NSString *)rootDir{
NSMutableArray *filePaths = [NSMutableArray new];
NSString *dirPath = [self getDir:dirName rootDir:rootDir];
if (dirPath) {
[self enumeratorFiles:dirPath block:^(NSString *path) {
[filePaths addObject:path];
}];
}
return filePaths;
}
+(NSString *)saveFile:(NSData *)tempData WithName:(NSString *)fileName
{
NSString* fullPathToFile = [self createPathWithFileName:fileName];
[self writeData:tempData toPath:fullPathToFile];
return fullPathToFile;
}
+(void)saveFile:(NSData *)data savePath:(NSString *)filePath{
[self writeData:data toPath:filePath];
}
+(NSString *)saveFile:(NSData *)tempData name:(NSString *)fileName rootDir:(NSString *)rootDir
{
NSString* fullPathToFile = [self createPathWithFileName:fileName rootDir:rootDir];
[self writeData:tempData toPath:fullPathToFile];
return fullPathToFile;
}
+(NSData *)dataForPath:(NSString *)path{
@synchronized (self) {
return [NSData dataWithContentsOfFile:path options:0 error:NULL];
}
}
+(void)writeData:(NSData*)data toPath:(NSString *)path {
@synchronized (self) {
[data writeToFile:path atomically:YES];
}
}
+(void)deleteDataAtPath:(NSString *)path {
[[NSFileManager defaultManager] removeItemAtPath:path error:NULL];
}
//+(void)deleteWithFileName:(NSString *)fileName{
//
// NSString* documentsDirectory = [self FileCacheDirectory];
//
// NSFileManager *defaultManager;
//
// defaultManager = [NSFileManager defaultManager];
// NSArray *contents = [defaultManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];
// NSEnumerator *e = [contents objectEnumerator];
//
// NSString *filename;
// NSArray *tempArray= [fileName componentsSeparatedByString:@"/"];
// NSString * distinationFileName;
// if ([tempArray count]>=2) {
// distinationFileName=[tempArray objectAtIndex:[tempArray count]-1];
// }else{
// distinationFileName=fileName;
// }
//
// while ((filename = [e nextObject])) {
//
// if ([filename isEqualToString:distinationFileName]) {
//
// [defaultManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];
// break;
// }
//
// }
//
//}
+(void)deleteWithFileName:(NSString *)fileName rootDir:(NSString *)rootDir{
NSFileManager *defaultManager;
defaultManager = [NSFileManager defaultManager];
NSArray *contents = [defaultManager contentsOfDirectoryAtPath:rootDir error:NULL];
NSEnumerator *e = [contents objectEnumerator];
NSString *filename;
NSArray *tempArray= [fileName componentsSeparatedByString:@"/"];
NSString * distinationFileName;
if ([tempArray count]>=2) {
distinationFileName=[tempArray objectAtIndex:[tempArray count]-1];
}else{
distinationFileName=fileName;
}
while ((filename = [e nextObject])) {
if ([filename isEqualToString:distinationFileName]) {
[defaultManager removeItemAtPath:[rootDir stringByAppendingPathComponent:filename] error:NULL];
break;
}
}
}
+(void)deleteWithFilePath:(NSString *)filePath{
if (filePath) {
NSFileManager *defaultManager = [NSFileManager defaultManager];
[defaultManager removeItemAtPath:filePath error:NULL];
}
}
+(void)clearCacheWithDirPath:(NSString*)dirPath{
NSFileManager *defaultManager = [NSFileManager defaultManager];
BOOL isDir = false;
BOOL isDirExist = [defaultManager fileExistsAtPath:dirPath isDirectory:&isDir];
if(!(isDirExist && isDir))
{
return;
}
NSArray *contents = [defaultManager contentsOfDirectoryAtPath:dirPath error:NULL];
for (NSString *path in contents) {
[defaultManager removeItemAtPath:[dirPath stringByAppendingPathComponent:path] error:NULL];
}
}
+(void)clearCache{
NSString* documentsDirectory = [self rootDirCache];
NSFileManager *defaultManager;
defaultManager = [NSFileManager defaultManager];
NSArray *contents = [defaultManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];
for (NSString *path in contents) {
[defaultManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:path] error:NULL];
}
}
+(BOOL)isFileExit:(NSString*)filePath{
NSFileManager *defaultManager = [NSFileManager defaultManager];
BOOL isDir = false;
BOOL isDirExist = [defaultManager fileExistsAtPath:filePath isDirectory:&isDir];
return isDirExist;
}
+(NSDate *) getFileCreateTime:(NSString*) path
{
NSDate *date;
NSFileManager * filemanager = [[NSFileManager alloc]init];
if([filemanager fileExistsAtPath:path]){
NSDictionary * attributes = [filemanager attributesOfItemAtPath:path error:nil];
if ([attributes objectForKey:NSFileCreationDate])
{
date = [attributes objectForKey:NSFileCreationDate];
}
}
return date;
}
+(NSInteger) getFileSize:(NSString*) path
{
NSFileManager * filemanager = [[NSFileManager alloc]init];
if([filemanager fileExistsAtPath:path]){
NSDictionary * attributes = [filemanager attributesOfItemAtPath:path error:nil];
NSNumber *theFileSize;
if ( (theFileSize = [attributes objectForKey:NSFileSize]) )
return [theFileSize intValue];
else
return -1;
}
else
{
return -1;
}
}
+ (float) getVideoDuration:(NSURL*) URL
{
NSDictionary *opts = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO]
forKey:AVURLAssetPreferPreciseDurationAndTimingKey];
AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:URL options:opts];
float second = 0;
second = urlAsset.duration.value/urlAsset.duration.timescale;
return second;
}
/*
*mov to mp4 ;presstName:AVAssetExportPresetLowQuality,AVAssetExportPresetMediumQuality,AVAssetExportPresetHighestQuality
*
*/
+(void)asyncConvertMovToMp4VideoWithVideoURL:(NSURL *)videoURL presetName:(NSString *)presetName failure:(void (^)(NSString *))failure success:(void (^)(NSString *))success cancell:(void (^)())cancell{
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyyMMddHHmmss"];
NSString *fileName = [[formater stringFromDate:[NSDate date]] stringByAppendingString:@".mp4"];
[self asyncConvertMovToMp4VideoWithVideoURL:videoURL fileName:fileName fileDir:DefautlDir rootDir:[self rootDirCache] presetName:presetName failure:failure success:success cancell:cancell];
}
+(void)asyncConvertMovToMp4VideoWithVideoURL:(NSURL *)videoURL fileName:(NSString *)fileName fileDir:(NSString *)fileDir rootDir:(NSString *)rootDir presetName:(NSString *)presetName failure:(void (^)(NSString *))failure success:(void (^)(NSString *))success cancell:(void (^)())cancell{
AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:videoURL options:nil];
NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
if ([compatiblePresets containsObject:presetName]) {
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:presetName];
NSString *path = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
exportSession.outputURL = [NSURL fileURLWithPath:path];
exportSession.shouldOptimizeForNetworkUse = NO;
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) {
case AVAssetExportSessionStatusFailed:
{
if (failure) {
NSError *e = [exportSession error];
NSLog(@"%@",e);
failure([[exportSession error] localizedDescription]);
}
break;
}
case AVAssetExportSessionStatusCancelled:
{
if (cancell) {
cancell();
}
break;
}
case AVAssetExportSessionStatusCompleted:
{
if (success) {
success(path);
}
break;
}
default:
break;
}
}];
}else{
if (failure) {
failure([NSString stringWithFormat:@"not exit %@ resource",presetName]);
}
}
}
+(void)cafToMP3:(NSString *)mp3FilePath cafFilePath:(NSString *)cafFilePath sampleRate:(int)sampleRate{
@try {
int read, write;
FILE *pcm = fopen([cafFilePath cStringUsingEncoding:1], "rb"); //source 被转换的音频文件位置
fseek(pcm, 4*1024, SEEK_CUR); //skip file header
FILE *mp3 = fopen([mp3FilePath cStringUsingEncoding:1], "wb"); //output 输出生成的Mp3文件位置
const int PCM_SIZE = 8192;
const int MP3_SIZE = 8192;
short int pcm_buffer[PCM_SIZE*2];
unsigned char mp3_buffer[MP3_SIZE];
lame_t lame = lame_init();
lame_set_in_samplerate(lame, sampleRate);
lame_set_VBR(lame, vbr_default);
lame_init_params(lame);
do {
read = (int)fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm);
if (read == 0)
write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE);
else
write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);
fwrite(mp3_buffer, write, 1, mp3);
} while (read != 0);
lame_close(lame);
fclose(mp3);
fclose(pcm);
}
@catch (NSException *exception) {
NSLog(@"%@",[exception description]);
}
@finally {
[self deleteDataAtPath:cafFilePath];
}
}
+(void)getImagePathFromPHAsset:(PHAsset *)asset fileName:(NSString *)fileName fileDir:(NSString *)fileDir rootDir:(NSString *)rootDir complete:(void (^)(NSString *, NSString *))result{
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
// 同步获得图片, 只会返回1张图片
options.synchronous = YES;
// options.version = PHImageRequestOptionsVersionOriginal;
// options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
//
CGSize size = CGSizeMake(asset.pixelWidth,asset.pixelHeight);
__block NSString *savePath = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:size contentMode:PHImageContentModeDefault options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {
NSData *data = UIImageJPEGRepresentation(result, 0.5f);
[FileUtils saveFile:data savePath:savePath];
}];
if (result) {
result(savePath,fileName);
}
}
+(void)getVideoPathFromPHAsset:(PHAsset *)asset fileName:(NSString *)fileName fileDir:(NSString *)fileDir rootDir:(NSString *)rootDir complete:(void (^)(NSString *, NSString *))result failure:(void (^)(NSString *))failure cancell:(void (^)())cancell{
// if(IOS9_OR_LATER){
//
// NSArray *assetResources = [PHAssetResource assetResourcesForAsset:asset];
// PHAssetResource *resource;
//
// for (PHAssetResource *assetRes in assetResources) {
// if (assetRes.type == PHAssetResourceTypePairedVideo ||
// assetRes.type == PHAssetResourceTypeVideo) {
// resource = assetRes;
// }
// }
//
//// if (resource.originalFilename) {
////
//// fileName = resource.originalFilename;
//// }
//
// if (asset.mediaType == PHAssetMediaTypeVideo || asset.mediaSubtypes == PHAssetMediaSubtypePhotoLive) {
//// PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
//// options.version = PHImageRequestOptionsVersionCurrent;
//// options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
//
// NSString *savePath = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
//
// [[PHAssetResourceManager defaultManager]writeDataForAssetResource:resource toFile:[NSURL fileURLWithPath:savePath] options:nil completionHandler:^(NSError * _Nullable error) {
//
// if (!error&&result) {
//
// result(savePath,[savePath lastPathComponent]);
//
// }else{
//
// if (cancell) {
//
// cancell();
// }
// }
// }];
//
// }else{
//
// if (cancell) {
//
// cancell();
// }
// }
//
//
// }else{
PHVideoRequestOptions *options = [[PHVideoRequestOptions alloc] init];
options.version = PHImageRequestOptionsVersionCurrent;
options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
PHImageManager *manager = [PHImageManager defaultManager];
[manager requestExportSessionForVideo:asset options:options exportPreset:AVAssetExportPresetMediumQuality resultHandler:^(AVAssetExportSession * _Nullable exportSession, NSDictionary * _Nullable info) {
NSString *savePath = [self createPathWithFileName:fileName direName:fileDir rootDir:rootDir];
[FileUtils deleteDataAtPath:savePath];
exportSession.outputURL = [NSURL fileURLWithPath:savePath];
exportSession.shouldOptimizeForNetworkUse = NO;
exportSession.outputFileType = AVFileTypeMPEG4;
[exportSession exportAsynchronouslyWithCompletionHandler:^{
switch ([exportSession status]) {
case AVAssetExportSessionStatusFailed:
{
if (failure) {
NSError *e = [exportSession error];
NSLog(@"%@",e);
failure([[exportSession error] localizedDescription]);
}
break;
}
case AVAssetExportSessionStatusCancelled:
{
if (cancell) {
cancell();
}
break;
}
case AVAssetExportSessionStatusCompleted:
{
if (result) {
result(savePath,[savePath lastPathComponent]);
}
break;
}
default:
break;
}
}];
}];
// }
}
@end