In the file Form1.cs, inside the handler of the "Save as." button, there is the line: Another important class is EditMp3Writer, which is a custom control that can be included in a form or dialog to configure the parameters of the compressor, as shown in the sample code.Īnother example of using the writer could be an improved version of the ripper described in my article C Sharp Ripper to rip directly to MP3 format.
The other overload accepts a Mp3WriterConfig instance, which wraps BE_CONFIG and it is serializable, so it can be used to persist the compressor configuration using serialization. There are two other overloads of the Mp3Writer constructor: one that accepts a BE_CONFIG instance, which is a structure translated from LAME that describes how the stream must be compressed (bit rate, compression method, quality, etc.). The input stream is read until the end and all the data is written to the writer, which converts it to MP3 format and saves the result to the output stream. The Mp3Writer constructor is called passing as the first parameter the stream where to write the resulting MP3 stream (in this case, a FileStream), and as second parameter the WaveFormat that specifies the format of the input data.
While ( (read = InStr.Read(buff, 0, buff.Length)) > 0 )įirst, a WaveStream is created to read the uncompressed audio data from a WAV file, then a Mp3Writer is created. Mp3Writer writer = new Mp3Writer( new FileStream( " SomeFile.mp3",īyte buff = new byte WaveStream InStr = new WaveStream( " SomeFile.wav")
#Mp3 compressor free download full code
The following code shows the simplest way to use the MP3 compressor with the default configuration: Within this library, I included all the translation of structures, constants, and functions needed to use lame_enc.dll. All other classes related to the MP3 compressor are in a library yeti.mp3. Using the codeĪudioWriter and other base and tools classes are in a library named yeti.mmedia. AudioWriter receives audio data in PCM format, then the data is compressed and written to the resulting stream, or just written without modifications using a specific format (WAV format, for instance, as in the WaveWriter class). The compressor I describe in this article ( Mp3Writer) is a class derived from AudioWriter, which is a binary writer that can be used as a base of writers for different audio streams (different audio formatters, compressors, etc.). One problem to mention about the use of the DLL is that in the current version, it is not possible to compress two streams at the same time. This DLL exports a few functions and it is relatively easy to use. However, an easier way to achieve that goal is to use the LAME compressor through the functions exposed by the lame_enc.dll. While it is true that the LAME encoder is written in C and all source code is available, one could think of compiling these source files in managed C++ to obtain a managed compressor. In this work, there is code from the article: A low level audio player in C# by Ianier Munoz. See this website for technical and copyright information regarding the LAME project. The solution was to use the LAME MP3 encoder, specifically to wrap in C# the functions of lame_enc.dll.
NET framework and I couldn't find the exact solution, so I decided to write one. Then I looked for some MP3 compressor done for.
#Mp3 compressor free download full how to
The first question to my previous article ( C Sharp Ripper) was about how to rip directly to MP3 format. Download source code and demo project - 160 Kb.
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