compression

I am attempting to create a new FileStream object from a byte array. I'm sure that made no sense at all so I will try to explain in further detail below. Tasks I am completing: 1) Reading the source file which was previously compressed 2) Decompressing the data using GZipStream 3) copying the decompressed data into a byte array. What I would like to change: 1) I would like to be able to use File.ReadAllBytes to read the decompressed data. 2) I would then like to create a new filestream object usingg this byte array. In short, I want to do this entire operating using byte arrays. One of the

Anybody can help show examples of using libarchive to extract ZIP files to a specified folder? It looks like the sample programs provided ( untar.c , tarfilter.c and minitar ) all extracts the archive to the current working directory. Is there a way to say "extract to this folder and below" to libarchive and not clobber the program's active folder? One of the main drivers is that the extraction code will be run in a background thread, and thus changing the program working directory may create problems. Also this will be used in an iOS application (iPhone, iPad), which is picky on what folders

Is it possible to compress a wav audio file without reducing the sampling rate? I have an audio file with 256 bit rate and sampling rate - 8000Hz. I would just like to reduce the bit rate to 128/64 kbs I tried converting to mp3 and back to wav, ffmpeg -i input.wav 1.mp3 ffmpeg -i "1.mp3" -acodec pcm_s16le -ar 4000 out.wav but this reduced sampling rate as well. ffmpeg -i "1.mp3" -acodec pcm_s16le -ab 128 out.wav has default 256 bit rate PCM ("WAV") is uncompressed, so -b:a / -ab is ignored. Calculating PCM bitrate Assuming a stereo input, 8000 samples per second, 16 bits per sample: sample

Greerings all Is there a way to compress data sent from php (server) and then uncompress the data using javascript (client)? Thanking you I have to agree with @Domenic's answer here. @Nishchay Sharma is way off. The only thing I'll add is if you want to do this on a per-script basis rather than configuring your entire server to compress everything, it's trivial to accomplish your goal by using PHP's gzencode() function coupled with a header call: http://www.php.net/manual/en/function.gzencode.php For instance, let's say you are retrieving a huge set of data via an Ajax call to a PHP page. You

I need to unzip/extract 7z compressed files in ios , Can anyone say the libraries used to do this,where are those libraries available to download.I there any sample project to do this ,let me know 7-Zip Lzma SDK - is a multi-language SDK for handling 7-zip files. Mo Dejong has created an example demonstrating how to use the LZMA SDK to decompress 7-zip libraries on iOS devices. You can find the example on his website here . iOS9 comes with LZMA support (encoder until level 6, decoder all levels). Of course this only helps if you just need the compression – if you absolutely need to read the 7z

ImageButton avatarButton = (ImageButton) findViewById(R.id.ImageButton_Avatar); avatarButton.setImageResource(R.drawable.avatar); strAvatarFilename = "Image.jpg"; final Uri imageUriToSaveCameraImageTo = Uri.fromFile(new File(Environment.getExternalStorageDirectory()+"/Folder/"+strAvatarFilename)); avatarButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent pictureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); pictureIntent.putExtra( MediaStore.EXTRA_OUTPUT, imageUriToSaveCameraImageTo ); startActivityForResult(Intent.createChooser

I am attempting to reverse engineer an LZ1/LZ77 decompression algorithm. The length of an area of the decode buffer/window to be output is encoded in the file as a variable length integer. I've read as much as I can about variable length integer encoding and the method being used in this case does not appear to be like any others I have seen. Perhaps to avoid patent issues or maybe just to obfuscate. The included code might not be quite complete but it is working on at least several files at this point. I cannot see how, if at all, the formulas being used below could be reduced into something