metadata

问题 How to select all records,that may contain specific value that is known, without referring to specific column in SQL expression? For instance, i know,that some unknown column holds value 'xxx' and there are many columns and records in table. Thank you. 回答1: So, you want to do a Google-like free text search over your database. This can be done but the performance will be Teh Suck! Google is fast because it has indexes on its indexes, duplicate data stores and generally optimizes everything for

问题 I am looking for a simple library, compatible with Python 3.7, which can extract metadata of video files, specifically the capture/recording datetime; the date and time when the video was shot. I am mainly looking to do this on .mov files. hachoir-metadata has no Python library as far as I'm aware; only a command-line interface, and enzyme works only on .mkv files, though this isn't clearly stated in the description. The reason I want to retrieve the recording/capture datatime as a string is

问题 I'm trying to extract text except watermark text from PDF files with Apache PDFBox library,so I want to remove the watermark first and the rest is what I want.but unfortunately,Both PDmetadata and PDXObject can't recognize the watermark,any help will be appreciated.I found some code below. // Open PDF document PDDocument document = null; try { document = PDDocument.load(PATH_TO_YOUR_DOCUMENT); } catch (IOException e) { e.printStackTrace(); } // Get all pages and loop through them List pages =

问题 We are looking to use CachedDataAnnotationsModelMetadataProvider as it improves performance and we use a lot of Meta Data in our MVC4 application. We are currently creating a custom ModelMetadataProvider inheriting from DataAnnotationsModelMetadataProvider and overriding CreateMetadata attribute to do some automatic display name creation e.g. remove Id from names etc. However we also want to cache it so we wanted to base our custom ModelMetadataProvider on

问题 I am trying to create a csv file that contains metadata in the first few rows, followed by timeseries data, so it can be processed by another web application. My csv file should look like this: Code: ABC1 Frequency: Monthly Description: Blah Blah ------------------- 2/1/1947 11.7 3/1/1947 11.9 I can create a csv file of the metadata: metadata=pd.Series([('code: ABC123'),('freqency: monthly'),('description: describecode'),('--------')]) metadata.to_csv("metadata.csv",index=False) I can create

问题 I've looked at the Schema.org spec for opening hours, but it seems to fail to address two key items: 1) Localbusinesses that have multiple hours (ie 8-12, 1-5 with the hole in the middle being closed for lunch) 2) Days where the business is closed altogether. I can't find any examples of anyone else doing it on google, this is my code for just normal hours (9-5) and my GUESS for how to handle days that are closed. Can someone chime in on multiple hours and confirm my handling of closed days

问题 Our of curiosity, is there a way to read PDF metadata -- such as the information shown below -- from R? I could not anything about that by searching from [r] pdf metadata in the current question base. Any pointers very welcome! 回答1: I can't think of a pure R way to do this, but you can probably install your favorite PDF command-line tool (for example, the PDF toolkit, PDFtk and use that to get at least some of the data you are looking for. The following is a basic example using PDFtk. It

问题 I found the command "mdls" which will show the metadata but I can't see how to delete it. I want to get rid of the comments "kMDItemFinderComment", "kMDItemWhereFroms" from my files. Is there a way to do this? 回答1: I think you're looking for the xattr command, available in Terminal: xattr -pr com.apple.metadata:kMDItemFinderComment / that will print all the finder comments for all files on your boot volume. To delete, use the -d switch: xattr -dr com.apple.metadata:kMDItemFinderComment / You

问题 I'm trying to add GPS metadata to the image taken with AVFoundation in swift. I have the code pasted below but it doesn't work yet. Where is my mistake? let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageDataSampleBuffer) let imgDataProvider = CGDataProviderCreateWithCFData(imageData); let imageRef = CGImageCreateWithJPEGDataProvider(imgDataProvider, nil, true, .RenderingIntentDefault) let properties = self.getImageProperties(imageData) let mutableDictionary:

问题 I'm looking for a good, feature-rich, library for reading metadata from various audio formats (MP3, FLAC, OGG, WAV, etc.). I have already looked at Mutagen, but the documentation is nearly nonexistent, and it seems incapable of loading basic information such as artist and audio title. 回答1: Are the artist and audio title encoded properly? What particular formats is it failing one - often ID3 information is poorly encoded. http://wiki.python.org/moin/UsefulModules#ID3Handling (A List of ID3