compression

I am creating zip using dotnetzip library. But I don't know how to check if a file exists in the zip. If the file exists then I will update the file with path. public void makezip(string flname) { string fln =flname; string curFile = @"d:\crs.zip"; if (File.Exists(curFile)) { ZipFile zipfl = ZipFile.Read(@"D:\crs.zip"); var result = zipfl.Any(entry => entry.FileName.EndsWith(@fln)); if (result == true) { zipfl.UpdateFile(@fln); }else{ zipfl.AddFile(@fln); } zipfl.Save(@"d:\crs.zip"); } else { try { ZipFile zipfl = new ZipFile(); var result = zipfl.Any(entry => entry.FileName.EndsWith(@fln));

I want to compress video file before uploading to server.I gone through this link How to compress a video to maximum level android , but i did not get an answer. Can anyone help me ?? Give this a try mediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH)); mediaRecorder.setVideoEncodingBitRate(690000 ); We can compress video using ffmpeg in android. For integrating FFmpeg in android we can use precompiled libraries like ffmpeg-android . You can use below command to compress video String[] command = {"-y", "-i", inputFileAbsolutePath, "-s", "160x120", "-r", "25", "-vcodec"

I have a .NET 2.0 WinForms app that connects to a backend WAS server. I am using GZipStream to decode data coming back from a HttpWebRequest call made to the server. The data returned is compressed CSV, which Apache is compressing. The entire server stack is Hibernate-->EJB-->Spring-->Apache. For small responses, the performance is fine (<50ms). When I get a response >150KB, it takes more than 60 seconds to decompress. The majority of the time seems to be spent in the GZipStream constructor. This is the code showing where I get the response stream from the HttpWebResponse call: using (Stream

I'm getting a CVImageBufferRef from my AVCaptureSession, and I'd like to take that image buffer and upload it over the network. To save space and time, I would like to do this without rendering the image into a CIImage and NSBitmapImage, which is the solution I've seen everywhere (like here: How can I obtain raw data from a CVImageBuffer object ). This is because my impression is that the CVImageBuffer might be compressed, which is awesome for me, and if I render it, I have to uncompress it into a full bitmap and then upload the whole bitmap. I would like to take the compressed data (realizing

We need to conditionally disable GZIP compression if user's browser is IE6 (it hangs browser for 5min) in few pages of larger site. Server is IIS7 and has compression for static content turned on - want that compression left working if user agent is not Mozilla/4.0. ASPX code sample anyone? Alternatively, code to conditionally redirect to the same page on another site (could create another virtual site with compression disabled) but need to pass all parameters (GET/POST). Check out this page . I believe ISAPI rewrite is available for IIS as well. Basically, it takes the browser's request and

Is there a method to determine if an exe file has been compressed with UPX? The function to determine if an exe file has been compressed is excellent except I found a problem with the code. If the function IsUPXCompressed is called then you try to run upx, upx can not save the file it modifies. There is something not sharing rights correctly in the function. I have tested this for several hours. If I do not call the method then UPX can write the files with no problem. You you call it then try to run UPX it will not save the file. UPX reports an IOException Permission denied error when trying

I have many large gzip files (approximately 10MB - 200MB) that I downloaded from ftp to be decompressed. So I tried to google and find some solution for gzip decompression. static byte[] Decompress(byte[] gzip) { using (GZipStream stream = new GZipStream(new MemoryStream(gzip), CompressionMode.Decompress)) { const int size = 4096; byte[] buffer = new byte[size]; using (MemoryStream memory = new MemoryStream()) { int count = 0; do { count = stream.Read(buffer, 0, size); if (count > 0) { memory.Write(buffer, 0, count); } } while (count > 0); return memory.ToArray(); } } } it works well for any