creating fsxs make[2]: 离开目录“/usr/local/freeswitch-1.10.2.-release” Making all in src make[2]: 进入目录“/usr/local/freeswitch-1.10.2.-release/src” Making all in mod make[3]: 进入目录“/usr/local/freeswitch-1.10.2.-release/src/mod” making all mod_amr make[4]: 进入目录“/usr/local/freeswitch-1.10.2.-release/src/mod/codecs/mod_amr” CC mod_amr_la-mod_amr.lo CCLD mod_amr.la make[4]: 离开目录“/usr/local/freeswitch-1.10.2.-release/src/mod/codecs/mod_amr” making all mod_av make[4]: 进入目录“/usr/local/freeswitch-1.10.2.-release/src/mod/applications/mod_av” Makefile:1396: *** You must install libavformat-dev to build mod_av。 停止。 make[4]: 离开目录“/usr/local/freeswitch-1.10.2.-release/src/mod/applications/mod_av” make[3]: *** [Makefile:701：mod_av-all] 错误 1 make[3]: 离开目录“/usr/local/freeswitch-1.10.2.-release/src/mod” make[2]: *** [Makefile:607：all-recursive] 错误 1 make[2]: 离开目录“/usr/local/freeswitch-1.10.2.-release/src” make[1]: *** [Makefile:3575：all-recursive] 错误 1 make[1]: 离开目录“/usr/local/freeswitch-1.10.2.-release” make: *** [Makefile:1290：all] 错误 2

这个错误提示是因为在编译mod_av时缺少libavformat-dev库。你需要安装libavformat-dev库，可以使用以下命令来安装：
sudo apt-get install libavformat-dev
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安装完成后再重新编译freeswitch即可。

相关问题

matlab app designer里用liat box 列举四种计算方法计算fsxs,选择一种方法,对其进行两个button的命令,两个命令可以自由切换；切换一种方法,再次执行刚才的两个button的命令,最后四种方法都执行一遍。需要Lisi box 和button的全部代码

以下是一个基本的MATLAB App Designer界面，其中包含一个List Box和两个Button，用于演示计算fsxs的四种计算方法：
classdef MyApp < matlab.apps.AppBase

% Properties that correspond to app components
properties (Access = public)
UIFigure matlab.ui.Figure
MethodListBox matlab.ui.control.ListBox
ComputeButton matlab.ui.control.Button
SwitchButton matlab.ui.control.Button
end

% Callbacks that handle component events
methods (Access = private)

% Button pushed function: ComputeButton
function ComputeButtonPushed(app, event)
% Get selected calculation method
method = app.MethodListBox.Value;

% Perform calculation using selected method
switch method
case 'Method 1'
fsxs = method1();
case 'Method 2'
fsxs = method2();
case 'Method 3'
fsxs = method3();
case 'Method 4'
fsxs = method4();
end

% Display the calculated value
disp(fsxs);
end

% Button pushed function: SwitchButton
function SwitchButtonPushed(app, event)
% Get selected calculation method
method = app.MethodListBox.Value;

% Switch to the next calculation method
switch method
case 'Method 1'
app.MethodListBox.Value = 'Method 2';
case 'Method 2'
app.MethodListBox.Value = 'Method 3';
case 'Method 3'
app.MethodListBox.Value = 'Method 4';
case 'Method 4'
app.MethodListBox.Value = 'Method 1';
end

% Execute the ComputeButton callback with the new method
ComputeButtonPushed(app, event);
end
end

% App initialization and construction
methods (Access = private)

% Create UIFigure and components
function createComponents(app)
% Create UIFigure and set properties
app.UIFigure = uifigure;
app.UIFigure.Position = [100 100 300 250];
app.UIFigure.Name = 'My App';

% Create MethodListBox
app.MethodListBox = uilistbox(app.UIFigure);
app.MethodListBox.Items = {'Method 1', 'Method 2', 'Method 3', 'Method 4'};
app.MethodListBox.Position = [20 80 120 120];
app.MethodListBox.Value = 'Method 1';

% Create ComputeButton
app.ComputeButton = uibutton(app.UIFigure, 'push');
app.ComputeButton.ButtonPushedFcn = createCallbackFcn(app, @ComputeButtonPushed, true);
app.ComputeButton.Position = [160 150 100 22];
app.ComputeButton.Text = 'Compute';

% Create SwitchButton
app.SwitchButton = uibutton(app.UIFigure, 'push');
app.SwitchButton.ButtonPushedFcn = createCallbackFcn(app, @SwitchButtonPushed, true);
app.SwitchButton.Position = [160 110 100 22];
app.SwitchButton.Text = 'Switch Method';
end
end

% App creation and deletion
methods (Access = public)

% Construct app
function app = MyApp
% Create UIFigure and components
createComponents(app)
end

% Code that executes before app deletion
function delete(app)

% Delete UIFigure when app is deleted
delete(app.UIFigure)
end
end
end
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其中，ComputeButtonPushed回调函数获取选择的计算方法，然后根据选择的方法计算fsxs。计算完成后，它将在命令窗口中显示计算出的值。
SwitchButtonPushed回调函数将切换到下一个计算方法，并调用ComputeButtonPushed回调函数以使用新方法计算fsxs。
您可以将此代码复制并粘贴到您的MATLAB App Designer项目中，然后自定义method1()，method2()，method3()和method4()函数以实现计算fsxs的四种不同方法。