视频导出失败

[jiangyuan0336]

提bug前必看
请先回答下列三个问题，否则不允处理，谢谢配合。
1、我最新的Demo是否有这个bug？【如果Demo没问题，请升级新版】
答：有

2、你用的是什么版本？升级到最新版后是否正常？
答：version 3.2.0，已经是最新的

3、是否有改动过我库内部的代码？【如有，请告诉我你改了什么】
答：没有改

bug内容描述
就是相册里面有两个视频，可以选取，但是如果导出的话就出现视频导出失败，TZImagePickerController[54670:16431685] 视频导出失败:视频导出失败,error:Error Domain=AVFoundationErrorDomain Code=-11800 "这项操作无法完成" UserInfo={NSLocalizedFailureReason=发生未知错误（-12780）, NSLocalizedDescription=这项操作无法完成, NSUnderlyingError=0x2830ea9a0 {Error Domain=NSOSStatusErrorDomain Code=-12780 "(null)"}}

我如何复现这个bug？
我可以把视频给你

截图

其它说明
有没有其它要补充的？比如你的初始化TZImagePickerController的代码

[jiangyuan0336]

IMG_3964.mp4.zip
IMG_3966.mp4.zip
这是导出失败的两个视频，麻烦您有时间看看。

[banchichen]

@jiangyuan0336 已复现，没啥时间看...
求PR呀...

[jiangyuan0336]

PR是什么？

[banchichen]

@jiangyuan0336 Pull Request哈，你fork TZ这个仓库，修复这个bug，再提交PR到TZ这个仓库，我验证后merge下发个版，以后大家就都可以使用你修复后的版本咯

[Lee5s]

同样遇到了这个问题,
我在getVideoOutputPathWithAsset: presetName: success: failure: 里将presetName 改为了AVAssetExportPresetLowQuality|AVAssetExportPresetMediumQuality 视频可以正常导出, IMG_3964.mp4.zip 也可正常导出 是否会引起其他问题还未验证

[cAibDe]

视频导出失败:视频导出失败,error:Error Domain=AVFoundationErrorDomain Code=-11800 "这项操作无法完成" UserInfo={NSLocalizedFailureReason=发生未知错误（-12780）, NSLocalizedDescription=这项操作无法完成, NSUnderlyingError=0x28146f930 {Error Domain=NSOSStatusErrorDomain Code=-12780 "(null)"}}

只有把presetName 变成AVAssetExportPresetLowQuality才可以

[jiangyuan0336]

我打印了一下AVAssetExportPreset的枚举值，发现这个视频包含AVAssetExportPresetHigh这个类型，但是导出确实存在问题的

[banchichen]

搜了一圈好像挺多人都遇到这个错误，但是都没有合适的解法...

presetName设置为AVAssetExportPresetLowQuality后IMG_3964.mp4确实可以导出了，原因不明...

[cAibDe]

如果导出压缩失败了 是不是可以直接把这个资源文件写入呢 不通过压缩

[jiangyuan0336]

- (void)getVideoOutputPathWithAsset:(PHAsset *)asset presetName:(NSString *)presetName success:(void (^)(NSString *outputPath))success failure:(void (^)(NSString *errorMessage, NSError *error))failure {
    PHVideoRequestOptions* options = [[PHVideoRequestOptions alloc] init];
    options.version = PHVideoRequestOptionsVersionOriginal;
    options.deliveryMode = PHVideoRequestOptionsDeliveryModeAutomatic;
    options.networkAccessAllowed = YES;
    [[PHImageManager defaultManager] requestAVAssetForVideo:asset options:options resultHandler:^(AVAsset* avasset, AVAudioMix* audioMix, NSDictionary* info){
        // NSLog(@"Info:\n%@",info);
        AVURLAsset *videoAsset = (AVURLAsset*)avasset;
        //在处理120帧无声音视频的时候，直接崩溃，原因是AVURLAsset *videoAsset = (AVURLAsset *)asset;因为asset是个基类，它有时会是AVComposition而不是AVURLAsset，这样就得不到视频的url，从而导致程序崩溃
        if ([videoAsset isKindOfClass:[AVURLAsset class]]) {
            if (videoAsset.URL){
                NSString *outputPath = self.outPutFile;
                NSData *data = [NSData dataWithContentsOfURL:videoAsset.URL];
                if (data){
                    [data writeToFile:outputPath atomically:YES];
                    success(outputPath);
                }else{
                    failure(@"导出失败", nil);
                }
            }else{
                failure(@"导出失败", nil);
            }
        }else{
            failure(@"导出失败", nil);
        }
    }];
//        [self startExportVideoWithVideoAsset:videoAsset presetName:presetName success:success failure:failure];
}

[jiangyuan0336]

我现在没有使用他给的指定presetName的方法 而是用的上面这个，就不会出现这样的问题了

[mlp1995]

NSArray *presets = [AVAssetExportSession exportPresetsCompatibleWithAsset:videoAsset];

NSNumber *size;
[videoAsset.URL getResourceValue:&size forKey:NSURLFileSizeKey error:nil];

if([size floatValue]<4194304){
    presetName= AVAssetExportPresetHighestQuality;
}
//视频压缩
if ([presets containsObject:presetName]) {


    NSError *error = nil;
    AVAssetTrack *assetVideoTrack = nil;
    AVAssetTrack *assetAudioTrack = nil;

    CMTime start = CMTimeMakeWithSeconds(0, videoAsset.duration.timescale);

    CMTimeRange range = CMTimeRangeMake(start, videoAsset.duration);

    // Check if the asset contains video and audio tracks
    if ([[videoAsset tracksWithMediaType:AVMediaTypeVideo] count] != 0) {
        assetVideoTrack = [videoAsset tracksWithMediaType:AVMediaTypeVideo][0];
    }

    if ([[videoAsset tracksWithMediaType:AVMediaTypeAudio] count] != 0) {
        assetAudioTrack = [videoAsset tracksWithMediaType:AVMediaTypeAudio][0];
    }

    CMTime insertionPoint = kCMTimeZero;

    AVMutableComposition *composition = [[AVMutableComposition alloc] init];

    // Insert the video and audio tracks from AVAsset
    if (assetVideoTrack != nil) {
        // 视频通道  工程文件中的轨道，有音频轨、视频轨等，里面可以插入各种对应的素材
        AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
        // 视频方向
        [compositionVideoTrack setPreferredTransform:assetVideoTrack.preferredTransform];
        // 把视频轨道数据加入到可变轨道中 这部分可以做视频裁剪TimeRange
        [compositionVideoTrack insertTimeRange:range ofTrack:assetVideoTrack atTime:insertionPoint error:&error];
    }


    if (assetAudioTrack != nil) {
        AVMutableCompositionTrack *compositionAudioTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
        compositionAudioTrack.preferredTransform = assetAudioTrack.preferredTransform;
        [compositionAudioTrack insertTimeRange:range ofTrack:assetAudioTrack atTime:insertionPoint error:&error];
    }


    NSDateFormatter *formater = [[NSDateFormatter alloc] init];
    NSString *outputPath = [NSHomeDirectory() stringByAppendingFormat:@"/tmp/video-%@.mp4", [formater stringFromDate:[NSDate date]]];
    if (videoAsset.URL && videoAsset.URL.lastPathComponent) {
        outputPath = [outputPath stringByReplacingOccurrencesOfString:@".mp4" withString:[NSString stringWithFormat:@"-%@", videoAsset.URL.lastPathComponent]];
    }

    AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:composition presetName:presetName];


    NSURL *url =  [NSURL fileURLWithPath:outputPath];


    NSFileManager *fm = [NSFileManager new];

    if ([fm fileExistsAtPath:outputPath]) {
       [fm removeItemAtPath:outputPath error:nil];
    }

    /** 删除原来剪辑的视频 */
    [fm removeItemAtPath:outputPath error:nil];

    exportSession.outputURL = url;

    NSLog(@"%@",outputPath);

    NSArray *supportedTypeArray = exportSession.supportedFileTypes;
    if ([supportedTypeArray containsObject:AVFileTypeMPEG4]) {
        exportSession.outputFileType = AVFileTypeMPEG4;
    } else if (supportedTypeArray.count == 0) {
        if (handler) handler(@"该视频类型暂不支持上传",nil);
        NSLog(@"No supported file types 视频类型暂不支持导出");
        return;
    } else {
        exportSession.outputFileType = [supportedTypeArray objectAtIndex:0];
    }

    if (![[NSFileManager defaultManager] fileExistsAtPath:[NSHomeDirectory() stringByAppendingFormat:@"/tmp"]]) {
        [[NSFileManager defaultManager] createDirectoryAtPath:[NSHomeDirectory() stringByAppendingFormat:@"/tmp"] withIntermediateDirectories:YES attributes:nil error:nil];
    }

    if (videoAsset.duration.timescale == 0 || exportSession == nil) {
        /** 这个情况AVAssetExportSession会卡死 */
        NSError *failError = [NSError errorWithDomain:@"LFVideoExportSessionError" code:(-100) userInfo:@{NSLocalizedDescriptionKey:@"exportSession init fail"}];
        if (handler) handler(@"视频压缩失败",failError);
        return;
    }

    WS(weakSelf)

    [exportSession exportAsynchronouslyWithCompletionHandler:^{

        dispatch_async(dispatch_get_main_queue(), ^{
            switch (exportSession.status) {
                case AVAssetExportSessionStatusFailed:
                    NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
                    break;
                case AVAssetExportSessionStatusCancelled:
                    NSLog(@"Export canceled");
                    break;
                case AVAssetExportSessionStatusCompleted:
                    NSLog(@"Export completed");
                    break;
                default:
                    break;
            }
            if ([exportSession status] == AVAssetExportSessionStatusCompleted && [fm fileExistsAtPath:outputPath]) {
               //成功
                [weakSelf uploadVideo:outputPath success:success failure:handler];
            } else {
                if (handler) handler([[exportSession error] localizedDescription],exportSession.error);
            }
        });
    }];

}else{
      if (handler) handler(@"视频压缩失败",nil);
}

[mlp1995]

使用这个可以成功压缩上面的两个视频 具体原理还在研究

[lingstart]

我也遇到了这个问题，即使使用 @mlp1995 的方法，但是只要是某些android上传的视频，使用iOS手机保存到相册，再去压缩导出依然不行。
后来我使用了七牛的框架（PLShortVideoKit）中的PLSAVAssetExportSession类替换了AVAssetExportSession，具体代码如下：

    NSMutableDictionary *outputSettings = [NSMutableDictionary dictionary];
    NSMutableDictionary *movieSettings = [NSMutableDictionary dictionary];
    
    outputSettings[PLSMovieSettingsKey] = movieSettings;
    
    movieSettings[PLSAssetKey] = videoAsset;
    movieSettings[PLSStartTimeKey] = [NSNumber numberWithFloat:0.f];
    movieSettings[PLSDurationKey] = [NSNumber numberWithFloat:CMTimeGetSeconds(videoAsset.duration)];
    movieSettings[PLSVolumeKey] = [NSNumber numberWithFloat:1.0f];
    
    PLSAVAssetExportSession *exportSession = [[PLSAVAssetExportSession alloc] initWithAsset:videoAsset];
    exportSession.outputFileType = PLSFileTypeMPEG4;
    exportSession.shouldOptimizeForNetworkUse = YES;
    exportSession.outputSettings = outputSettings;
    exportSession.isExportMovieToPhotosAlbum = NO;
    
    [exportSession setCompletionBlock:^(NSURL *url) {
        dispatch_async(dispatch_get_main_queue(), ^{
            if (success) {
                success(url.path);
            }
        });
    }];
    
    [exportSession setFailureBlock:^(NSError *error) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [SVProgressHUD showErrorWithStatus:@"合成视频失败"];
        });
    }];
    
    [exportSession exportAsynchronously];