I have binary asd i want to save as a myvideo.mp4, So my question is that if you have binary and you want to store your file,
So how it would accomplished any one idea i didn't work yet with binary and streaming i am new with these all things so if any one know please share a piece of example which solve my problem.
like response.outStream in this i am getting binary so can i save as a myvideo.mp4 what would be that process actually this binary is generating for mp4 conversion so any idea.
thanks.
You will need to create a FileStream to write to and then you will read the source stream in a loop, reading a block and then writing that block to the FileStream. It should be fairly easy to find an example of reading a stream in a loop using its Read method.
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Is it possible, using DotSpatial, to read data from a stream (or set of streams) instead of from a specific file? I was hoping that I could point it at the encompassing ZIP file and it'd just work.
I've looked at the Shapefile.Open() and Shapefile.OpenFile() methods, but there doesn't seem to be anything to open ZIP files or multiple streams.
Easy question. I need to read a CSV file in .NET, and for that I'm using the Lumenworks CSV library.
The problem is that it seems this solution reads the entire CSV content into memory. I was wondering if there's another option that would let me run through the CSV content one element at a time, and therefore, consume less memory.
Something like XmlDocument vs. XmlReader.
Thanks
You can use StreamReader Class to load the file line by line to do some operations like searching, matching, etc., with the method StreamReader.ReadLine Method. One sample is contained in it to show how. This really costs little time.
Store the position or line number after once of operation, then in the next operation use the Stream.Seek Method to start load from the stored position.
I need to parse a large trace file (up to 200-300 MB) in a Flex application. I started using JSON instead of XML hoping to avoid these problems, but it did not help much. When the file is bigger than 50MB, JSON decoder can't handle it (I am using the as3corelib).
I have doing some research and I found some options:
Try to split the file: I would really like to avoid this; I don't want to change the current format of the trace files and, in addition, it would be very uncomfortable to handle.
Use a database: I was thinking of writing the trace into a SQLite database and then reading from there, but that would force me to modify the program that creates the trace file.
From your experience, what do you think of these options? Are there better options?
The program that writes the trace file is in C++.
Using AMF will give you much smaller data sizes for transfer because it is a binary, not text format. That is the best option. But, you'll need some middleware to translate the C++ program's output into AMF data.
Check out James Ward's census application for more information about benchmarks when sharing data:
http://www.jamesward.com/census/
http://www.jamesward.com/2009/06/17/blazing-fast-data-transfer-in-flex/
Maybe you could parse the file into chunks, without splitting the file itself. That supposes some work on the as3 core lib Json parser, but it should be doable, I think.
I found this library which is a lot faster than the official one: https://github.com/mherkender/actionjson
I am using it now and works perfectly. It also has asynchronous decoder and encoder
I have an objective to transfer some files which can be pdf, jpg and xml from one location to another. I am creating a handler based API for that. What could be the best approach for doing it? Should i return a byte array so that the client can pick the byte array and convert it back to file? Also the max file size I need to handle is 18 MB, so i have to make sure that the sizes are properly handled. Should I do an asynchronous transfer for that? If there is some sample code available it would be great.
i got it done using this: http://blog.net-tutorials.com/2009/03/16/how-to-download-a-file-from-the-internet-with-c/ but it has another issue which i mentioned in another question here:
WebClient.DownloadFileAsync downloading the file on server
I've got a bunch of audio files (let's say ogg or mp3), with metadata.
I wish to read their metadata into R so to create a data.frame with:
file name
file location
file artist
file album
etc
Any way you know of for doing that ?
You take an existing mp3 or ogg client, look at what library it uses and then write a binding for said library to R, using the existing client as guide for that side -- and something like Rcpp as a guide on the other side to show you how to connect C/C++ libraries to R.
No magic bullet.
A cheaper and less reliable way is to use a cmdline tool that does what you want and write little helper functions that use system() to run that tool over the file, re-reading the output in R. Not pretty, not reliable, but possibly less challenging.
Possible, yes, easy, no.
You "could" use a combination of readChar and/or readBin on the file and parse out the contents. This would be highly dependent, though, on parsing the frame tags from the raw bytes of the ID3v2 tag (and mind you it would change if it was a version 1 tag). If would certainly be a lot of work to implement a straight R solution. Take this Python code for example, it's very clean straight python code but a lot of branching and parsing.
You can use exiftool with system command available in R. Optionally, you can create regexp to handle the fields you need... If I were you, I'd stick with Dirk's advice (as usual) =)!
Out here in 2021, I wanted to do this so I did the following...
Create a new playlist while in 'songs' view.
Select all songs and drag to the new playlist. Highlight that playlist
File> Library>Export Playlist. My default file was to save as .txt, if not, designate.
Open Excel to save as csv or read.delim() in r as the txt file is tab-separated
import to R