[AVCompositionURL]:unrecognizedselectorsenttoinstance

[manager requestAVAssetForVideo:PHAssetoptions:videoRequestOptionsresultHandler:^(AVAsset * avasset, AVAudioMix * audioMix, NSDictionary * info) {}];代码报错&＃xff1a;原因是

avasset 可能是AVURLAsset  与 AVComposition &＃xff0c; 直接调用 【avasset URL】&＃xff0c;当选取的视频 是慢动作视频&＃xff0c;huicrash&＃xff1b;

解决思路&＃xff1a;

1、过滤慢动作视频

//加载视频
&＃43; (void)loadVideos {dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ALAssetsLibrary *videolibrary &＃61; [[ALAssetsLibrary alloc] init];__block NSMutableArray *reList&＃61;[NSMutableArray array];__block BOOL flag&＃61;true;[videolibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {if (group) {[group setAssetsFilter:[ALAssetsFilter allVideos]];[group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {if (result) {BDHKUGCVideoInfoItem *videoInfo&＃61;[[BDHKUGCVideoInfoItem alloc] init];videoInfo.thumbnail &＃61; [UIImage imageWithCGImage:result.thumbnail];videoInfo.videoURL &＃61; result.defaultRepresentation.url;NSInteger duration &＃61; [[result valueForProperty:ALAssetPropertyDuration] integerValue];videoInfo.duration &＃61; [NSDate durationWithSeconds:duration];videoInfo.name &＃61; result.defaultRepresentation.filename;videoInfo.size &＃61; result.defaultRepresentation.size; //BytesvideoInfo.format &＃61; [result.defaultRepresentation.filename pathExtension];videoInfo.creationDate &＃61; [result valueForProperty:ALAssetPropertyDate];PHFetchResult *fetchResult &＃61; [PHAsset fetchAssetsWithALAssetURLs:&＃64;[videoInfo.videoURL] options:nil];PHAsset *phAsset &＃61; fetchResult.firstObject;[[PHImageManager defaultManager] requestAVAssetForVideo:phAsset options:nilresultHandler:^(AVAsset *avAsset, AVAudioMix *audioMix, NSDictionary *info) {//视频上传不支持慢视频if (avAsset && [avAsset isKindOfClass:[AVURLAsset class]]) {if(videoInfo.thumbnail && videoInfo.videoURL && duration>7) {[reList addObject:videoInfo];}}}];}}];} else {//没有更多的group时&＃xff0c;即可认为已经加载完成。if(flag) {//防止重复通知dispatch_async(dispatch_get_main_queue(), ^{//*******//按创建时间倒序NSSortDescriptor *creationDateDesc &＃61; [NSSortDescriptor sortDescriptorWithKey:&＃64;"creationDate" ascending:NO];NSArray *descriptorArray &＃61; [NSArray arrayWithObjects:creationDateDesc, nil];NSArray *sortedArray &＃61; [reList sortedArrayUsingDescriptors: descriptorArray];//*******//通知返回数据[[NSNotificationCenter defaultCenter] postNotificationName:&＃64;"ugc_camera_result_notif" object:sortedArray];});flag &＃61; false;}}} failureBlock:^(NSError *error) {NSLog(&＃64;"error&＃61;%&＃64;",error);//增加错误返回处理if(flag) {//防止重复通知dispatch_async(dispatch_get_main_queue(), ^{NSArray *sortedArray &＃61; [[NSArray alloc] init];//通知返回数据[[NSNotificationCenter defaultCenter] postNotificationName:&＃64;"ugc_camera_result_notif" object:sortedArray];});flag &＃61; false;}}];});
}

2、将选取的视频存储到本地&＃xff0c;上传视频使用

//Output URL
NSArray *paths &＃61; NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory &＃61; paths.firstObject;
NSString *myPathDocs &＃61; [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:&＃64;"mergeSlowMoVideo-%d.mov",arc4random() % 1000]];
NSURL *url &＃61; [NSURL fileURLWithPath:myPathDocs];//Begin slow mo video export
AVAssetExportSession *exporter &＃61; [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL &＃61; url;
exporter.outputFileType &＃61; AVFileTypeQuickTimeMovie;
exporter.shouldOptimizeForNetworkUse &＃61; YES;[exporter exportAsynchronouslyWithCompletionHandler:^{dispatch_async(dispatch_get_main_queue(), ^{if (exporter.status &＃61;&＃61; AVAssetExportSessionStatusCompleted) {NSURL *URL &＃61; exporter.outputURL;NSData *videoData &＃61; [NSData dataWithContentsOfURL:URL];// Upload[self uploadSelectedVideo:video data:videoData];}});
}];
参考地址&＃xff1a;
 
https://overflow.buffer.com/2016/02/29/slow-motion-video-ios/