3gpp to wav

Another product of the company, when monitoring CTI, the recording format is PCM.To play in IE, You need to convert it into a standard WAV. previously, I used a com library for conversion. Now I can't use that library for various reasons (64-bit support is not good), So I implemented it in Java. The basic code is as follows.In fact, WAV is only a PCM file with the relevant file header and description inform

The format of the wave file in the wav file header: 00 h 4 char "riff" flag 04 H 4 long int file length 08 H 4 char "wave" flag 0ch 4 char "FMT" flag 10 H 4 transition byte (optional) 14 H 2 int format category (10 h is PCM sound data) 16 h, 2 int channels, 1 single channel, 2 dual channels 18 h 2 int sampling rate (number of samples per second), indicating the playback speed of each channel, 1ch 4 long int waveform audio data transmission rate. The v

Dat data format 5A 5A 5A xx (frame header) the frame header is followed by the first ad Channel 1 data (2 bytes), the second Ad Channel 1 data (2 bytes), and the first ad Channel 2 data (2 bytes ), the second AD Channel 2 data (2 bytes ),......... The first ad Channel 6 data (2 byte) and the second Ad Channel 6 data (2 byte ). I extracted the first ad Channel 6 data. Then convert it to 16 bit, and then-32768 to positive and negative signals, because ad collects 0-5 V signals, minus 32768 to conv

Php converts a wav file into an image file and displays it on the page, This example describes how php converts a wav file into an image file and displays it on the page. Share it with you for your reference. The specific analysis is as follows: Requirement: convert a wav file to a png file and display it. Wav_To_Png.php: As follows: I hope this article will he

Problem You want to have a method for playing sound quickly. Solution In xna3.0, you can directly load and play sounds from xNa without loading them using xact. Although this method removes some advanced xact functions, it makes playing sound very easy. Working Principle First, add a sound file to the project. The method is the same as adding an image to the project. For more information, see tutorial 3-1. The simplest solution is to drag a .wav fi

To convert audio files in WAV format to MP3 format, there is no need to find a special format conversion tool. It is not that complicated. Your computer has a ready-made tool, this is the "recorder" in the Windows attachment. Using this tool, you can easily convert the WAV format to the MP3 format. The procedure is as follows:Choose Start> program> attachment> Entertainment> recorder, open the recorder prog

How Python uses Wxpython to open and play WAV files This article mainly introduces Python using Wxpython to open and play wav files, involving Python operation of audio files related skills, need friends can refer to the This example describes how Python opens and plays a WAV file using Wxpython. Share to everyone for your reference. The implementation methods

Another product of the company, when monitoring CTI, the format of recording is PCM.In order to be able to play in IE, you need to convert to a standard WAV. Used to be a COM library to do the conversion, now for a variety of reasons can not use the library (64-bit support is not good, etc.), the implementation of a java. The basic code is as follows.In fact, WAV is only PCM file plus related file headers a

Play the. wav file in JS Copy Code code as follows: var recordhisstore = new Ext.data.JsonStore ({ Root: ' DataRoot ', Totalproperty: ' TotalCount ', Idproperty: ' ThreadID ', Remotesort:true, Fields: [ {name: ' id ', type: ' String '}, {name: ' src ', type: ' String '}, {name: ' DST ', type: ' String '}, {name: ' Srcip ', type: ' String '}, {name: ' Dstip ', type: ' String '}, {name: ' Begin_date ', type: ' Date ', DateForma

This example describes how Python opens and plays a WAV file using Wxpython. Share to everyone for your reference. The implementation method is as follows: "' Wx_lib_filebrowsebutton_sound.pyselect a sound file and play Itwx.lib.filebrowsebutton.FileBrowseButton (parent, LabelText, Filemask) (combines WX. Textctrl and Wxfiledialog widgets) wx. Sound (fileName, isresource=false) tested with Python27 and wxPython291 by Vegaseat 25jul2013 ' Import wximp

In the study of "dialect and Chinese culture", we need to submit a recording, the phone's recording default is WAV format, need to convert to MP3 formatLinux can be converted with lameLame sample.wav sample.mp3lame-h sample.wav Sample.mp3 # highest qualitylame-h-b sample.wav Sample.mp3 # Fixed bit Rate Jstereo KbpsGUI tools are soundconverter, and there are several other toolsYou can also use the online conversionReference:http://blog.longwin.com.tw/2

This article describes how Python opens and plays a WAV file using Wxpython. Share to everyone for your reference. The implementation method is as follows: "' wx_lib_filebrowsebutton_sound.py Select a sound file and play it Wx.lib.filebrowsebutton.FileBrowseButton (parent, LA Beltext, Filemask) (combines WX. Textctrl and Wxfiledialog widgets) wx. Sound (FileName, isresource=false) tested with Python27 and wxPython291 by Vegaseat 25jul2013 ' ' Im

Tutorial on how to capture a CD as a WAV file 1. First, the implementation of exact Audio Copy (hereinafter referred to as EAC) main program, open EAC main interface; 2. Then open the "drive options" in the EAC item in the menu bar to set up the catch mode. Note: This is critical and directly affects the audio quality of the captured rail 3. "Catch mode" setting: It is recommended to use precise flow, disable caching, do not use C2 sec

1, import wave used to read and write WAV files It provides a convenient WAV format interface. However, compression/decompression is not supported and mono/stereo is supported. Read format: Open (file[, mode]) If file is a string, open it or treat it as a class file object. Mode can be default, and if the input parameter is a class file object, then File.mode will be the value of mode. Mode optional paramet

Using PHP to analyze and draw the waveform of audio files, the Internet is still rarely seen. In fact, as long as the specification of WAV files, using PHP fseek,fopen,fopen,pack/unpack functions, as well as the powerful GD graphics library, these are very easy. Many people may be unfamiliar with the pack/unpack function; this is actually PHP borrowed from Perl, and they provide a way to access complex binary data structures using scripting languages.

WAV conforms to the riff (Resource Interchange file Format) files specification, which is used to hold audio information resources for the Windows platform and is widely supported by the Windows platform and its applications, which also supports Msadpcm,ccitt A Law, such as a variety of compression operations, supporting a variety of audio numbers, sampling frequency and channel, standard format WAV files a

Question: How to play WAV audio files in the wince System Mailing site: dianheting BBS (Tue Apr 15 12:55:40 2008), this site (bbs.cumt.edu.cn) This example runs successfully in the wince5.0 +. Net cf2.0 environment. The following namespace must be referenced in this example: System System. Io System. Reflection System. runtime. interopservices System. Windows. Forms This example shows how to use a platform call to play two

Wav files are also divided into several types, and the corresponding non-data information is stored in the file header section. Below are various WAV file header formats. Table 1 wave File Header Format for 8 KHz sampling and 16-bit quantization of linear PCM speech signals (44 bytes in total)Offset address byte data type content file header is defined00 H 4 char "riff" char riff_id [4] = "riff"04 H 4 lon

If this problem occurs, search for historical data as usual. One clue was found: "merging through WAV file format" Let's take a look at the wav file format first. Obviously, subchunk2size indicates the audio data size. If the format is the same, try to merge the data area. Of course, the subchunk2size audio data size and file size chunksize need to be recalculated Type Twavformat =Packed Record Chunkid:Ar

channels.PlayWav Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Using System; Using System. Collections. Generic; Using System. ComponentModel; Using System. Data; Using System. Drawing; Using System. Text; Using System. Windows. Forms; // Referenced namespaceUsing Microsoft. DirectX. DirectSound; Namespace MyVoice{Public partial class Form4: Form{Public Form4 (){InitializeComponent ();} Private SecondaryBuffer secBuffer; // buffer objectPriv