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

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

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。