小编Mic*_*ria的帖子

我的数据库中有一个存储为时间戳的字段,我需要在EPOCH时间内以秒为单位输出.

每当我尝试提交我的工作时,我都会收到此错误.

fatal: could not parse HEAD

如果我想保留我的更改,我该怎么办？

如何上传ActionDispatch::Http::UploadedFile到Amazon S3？

@file_data = params[:upload][:file]
s3 = AWS::S3.new
obj = s3.buckets['WeMake'].objects.create("video", file)

然后我得到这个错误:ArgumentError(:数据必须作为字符串,路径名,文件或响应#read和#eof？的对象提供):

我正在使用AVAssetWriter来录制视频,我希望能够将视频裁剪成一个偏离顶部的正方形.这是我的代码 -

NSDictionary *videoCleanApertureSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                                            @320, AVVideoCleanApertureWidthKey,
                                            @320, AVVideoCleanApertureHeightKey,
                                            @10, AVVideoCleanApertureHorizontalOffsetKey,
                                            @10, AVVideoCleanApertureVerticalOffsetKey,
                                            nil];


NSDictionary *videoAspectRatioSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                                          @3, AVVideoPixelAspectRatioHorizontalSpacingKey,
                                          @3,AVVideoPixelAspectRatioVerticalSpacingKey,
                                          nil];



NSDictionary *codecSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                               [NSNumber numberWithInteger:bitsPerSecond], AVVideoAverageBitRateKey,
                               @1,AVVideoMaxKeyFrameIntervalKey,
                               videoCleanApertureSettings, AVVideoCleanApertureKey,
                               //AVVideoScalingModeFit,AVVideoScalingModeKey,
                               videoAspectRatioSettings, AVVideoPixelAspectRatioKey,
                               nil];

NSDictionary *videoCompressionSettings = [NSDictionary dictionaryWithObjectsAndKeys:
                               AVVideoCodecH264, AVVideoCodecKey,
                               codecSettings,AVVideoCompressionPropertiesKey,
                               @320, AVVideoWidthKey,
                               @320, AVVideoHeightKey,
                               nil];

每当我取消注释AVVideoScalingModeKey时,我的assetWriter都会给出一个关于无法应用videoCompressionSettings的错误.我尝试过如何使用AVAssetWriter制作缩小尺寸的视频？但它仍然不适合我.

我需要能够禁用特定电子邮件的特定布局.我已经看了Rails for ActionMailer - 如何为某个邮件程序禁用布局但是我不知道在哪里以及如何输出必要的代码.我是Ruby的新手,已经搜索过API文档,无法找到我需要的确切代码行.

我正在尝试合并NSURLs包含视频引用的两个.其中一个网址指向AWS上的视频,另一个指向本地存储的视频.我的导出代码有效,因为我已尝试使用两个本地视频,但每当我尝试合并HTTP网址和本地网址时,我都会收到此错误:Error Domain=NSURLErrorDomain Code=-1100 "The requested URL was not found on this server." UserInfo=0x155d2f20 {NSUnderlyingError=0x155b4f60 "The operation couldn’t be completed. No such file or directory", NSLocalizedDescription=The requested URL was not found on this server.} 这是创建AVAssets的代码:

AVAsset *firstAsset = [AVAsset assetWithURL:awsURL];

是否AVAssetExportSession需要使用本地网址？