Note that the files created this way can be extracted by the 7zip program as well but will not retain their filename or any other metadata. Long fileLength = BitConverter.ToInt64(fileLengthBytes, 0) Ĭoder.Code(input, output, input.Length, fileLength, null) Private static void DecompressFileLZMA(string inFile, string outFile) Output.Write(BitConverter.GetBytes(input.Length), 0, 8) Using it as an example it would seem you need to write and read the encoder properties and decompresses file size to your output file: private static void CompressFileLZMA(string inFile, string outFile)įileStream input = new FileStream(inFile, FileMode.Open) įileStream output = new FileStream(outFile, FileMode.Create) If you look into the LMZAAlone folder of the SDK there is code that compresses and decompresses files. This question is a little old, but google fails to provide a satisfactory answer so this is for those like me still seeking it out. But how to compute the output size otherwise? The outSize is computed the same way than their Compress method. Long compressedSize = inStream.Length - inStream.Position ĭecoder.Code(inStream, outStream, compressedSize, outSize, null) decoder = new () ĭecoder.SetDecoderProperties(properties) public static void Decompress(Stream inStream, Stream outStream) This file generated by Koders is not a 7z archive. coder = new () Ĭoder.Code(input, output, input.Length, -1, null) Īccording to an other code, it seems that the decoder needs a header, a dictionary at the beginning of the file to work. I try : private static void DecompressFileLZMA(string inFile, string outFile) Using (FileStream output = new FileStream(outFile, FileMode.Create)) Using (FileStream input = new FileStream(inFile, FileMode.Open)) Private static void CompressFileLZMA(string inFile, string outFile) NET?, WOPR tell us how to compress a file with LMZA (7z compression algorithm) using 7z SDK ( ) using According to this link How do I create 7-Zip archives with.

Decompress 7z mac