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/VLC/Show Video Images in Web App
Required plugins for this example: MBS VLC Plugin, MBS Util Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /VLC/Show Video Images in Web App
This example is the version from Sun, 4th Jul 2020.
Project "Show Video Images in Web App.xojo_binary_project"
Class App Inherits WebApplication
EventHandler Sub Open(args() as String) DebugCopyLibs End EventHandler
Sub DebugCopyLibs() // copy vlc libs into app // you need 32 bit version of VLC to have this work for 32bit app! // and 64-bit libs for 64-bit app #if TargetMacOS then #if Target32Bit then // we keep an old copy of version 2.0.9 for 32-bit dim apppath as FolderItem = SpecialFolder.Applications.Child("VLC") #else Dim apppath As FolderItem = GetFolderItem("/Applications/", folderitem.PathTypeNative) #endif if apppath<>Nil and apppath.Visible then dim ContentsFolder as FolderItem = apppath.Child("Contents") if ContentsFolder<>Nil and ContentsFolder.Visible then dim MacOSFolder as FolderItem = ContentsFolder.Child("MacOS") if MacOSFolder<>Nil and MacOSFolder.Visible then dim TargetFolder as FolderItem = app.ExecutableFile.parent dim LibFolder as FolderItem = MacOSFolder.Child("lib") LibFolder.CopyFileTo TargetFolder dim pluginsFolder as FolderItem = MacOSFolder.Child("plugins") pluginsFolder.CopyFileTo TargetFolder end if end if end if #endif #if TargetWin32 then dim VideoLANFolder as FolderItem = SpecialFolder.Applications.Child("VideoLAN") if VideoLANFolder<>Nil and VideoLANFolder.Visible then System.DebugLog VideoLANFolder.NativePath dim VLCFolder as FolderItem = VideoLANFolder.Child("VLC") if VLCFolder<>Nil and VLCFolder.Exists then dim ExecutableFolder as FolderItem = app.ExecutableFile.parent dim libvlc as FolderItem = VLCFolder.Child("libvlc.dll") libvlc.CopyFileTo ExecutableFolder dim libvlccore as FolderItem = VLCFolder.Child("libvlccore.dll") libvlccore.CopyFileTo ExecutableFolder dim pluginsFolder as FolderItem = VLCFolder.Child("plugins") dim destPluginsFolder as FolderItem = ExecutableFolder.Child("plugins") // copy whole folder dim w as new WindowsFileCopyMBS call w.FileOperationCopy(pluginsFolder, destPluginsFolder, w.FileOperationNoErrorUI+w.FileOperationNoConfirmation) end if end if #endif #if TargetLinux // please copy libs or put symlinks in the folder now Break #endif End Sub
End Class
Class Session Inherits WebSession
Const ErrorDialogCancel = "Do Not Send"
Const ErrorDialogMessage = "This application has encountered an error and cannot continue."
Const ErrorDialogQuestion = "Please describe what you were doing right before the error occurred:"
Const ErrorDialogSubmit = "Send"
Const ErrorThankYou = "Thank You"
Const ErrorThankYouMessage = "Your feedback helps us make improvements."
Const NoJavascriptInstructions = "To turn Javascript on, please refer to your browser settings window."
Const NoJavascriptMessage = "Javascript must be enabled to access this page."
End Class
Class WebPage1 Inherits WebPage
Const kLibrary = "libvlc"
Control ImageViewer Inherits WebImageView
ControlInstance ImageViewer Inherits WebImageView
EventHandler Sub PictureChanged() CheckNewFrame End EventHandler
End Control
Control Info Inherits WebLabel
ControlInstance Info Inherits WebLabel
End Control
Control Label1 Inherits WebLabel
ControlInstance Label1 Inherits WebLabel
End Control
EventHandler Sub Close() if mp<>Nil then mp.stop end if End EventHandler
EventHandler Sub Open() OpenFile CheckNewFrame End EventHandler
Sub CheckNewFrame() // show frame counter Counter = Counter + 1 info.text = Str(Counter) if mp<>nil then // and draw picture to window CurrentPicture = mp.CopyPicture if CurrentPicture<>nil then ImageViewer.Picture = CurrentPicture end if end if End Sub
Sub OpenFile() dim moviefile as FolderItem = SpecialFolder.Desktop.Child("") if moviefile.Exists = false then MsgBox "Please put on your desktop or change path in code." Return end if dim LibName as string = kLibrary dim ExecutableFolder as FolderItem = app.ExecutableFile.parent #if TargetMacOS then // preload library, so it's not complaining that file is not found later. dim LibFolder as FolderItem = ExecutableFolder.Child("lib") dim libvlccore9 as FolderItem = LibFolder.Child("libvlccore.9.dylib") if libvlccore9 <> nil and libvlccore9.Exists then dim s as new SoftDeclareMBS if s.LoadDylib(libvlccore9.NativePath) then 'MsgBox "OK" System.DebugLog" loaded." else MsgBox s.Liberror end if end if dim libvlccore8 as FolderItem = LibFolder.Child("libvlccore.8.dylib") if libvlccore8 <> nil and libvlccore8.Exists then dim s as new SoftDeclareMBS if s.LoadDylib(libvlccore8.NativePath) then 'MsgBox "OK" System.DebugLog" loaded." else MsgBox s.Liberror end if end if dim libvlc5 as FolderItem = LibFolder.Child("libvlc.5.dylib") if libvlc5 <> nil and libvlc5.Exists then dim s as new SoftDeclareMBS if s.LoadDylib(libvlc5.NativePath) then 'MsgBox "OK" LibName = libvlc5.NativePath System.DebugLog" loaded." else MsgBox s.Liberror end if end if // we need to put path to plugins in environment variable to make it work dim Plugins as FolderItem = ExecutableFolder.Child("plugins") System.EnvironmentVariable("VLC_PLUGIN_PATH") = Plugins.NativePath #endif // load library if VLCInstanceMBS.LoadLibrary(LibName) then System.DebugLog "Library Loaded." else msgbox "Failed to load library"+EndOfLine+EndOfLine+VLCInstanceMBS.GetLoadError Return end if // startup vlc engine dim margs(-1) as string margs.append "--no-video-title-show" // nor the filename displayed */ margs.append "--verbose=0" // show only errors */ margs.append "--no-media-library" // don't want that */ margs.append "--no-sub-autodetect" // don't want subtitles */ margs.append "--ignore-config" // System.DebugLog "Init..." dim v as new VLCInstanceMBS(margs) // System.DebugLog "Inited." if v.Handle=0 then msgbox "Failed to initialise." Return end if // and simply play a movie. Video goes to our buffer, so we can get it in the timer #if RBVersion < 2013 then m = VLCMediaMBS.MediaWithPath(v, Moviefile.UnixpathMBS) #else m = VLCMediaMBS.MediaWithPath(v, Moviefile.NativePath) #endif if m = nil then MsgBox "Failed to get media." Return end if mp = new VLCMediaPlayerMBS(m) if mp.Handle=0 then msgbox "Failed to init media player." Return end if // figure out size of video m.Parse dim info() as VLCMediaTrackInfoMBS = m.TrackInfos dim h as integer = 640 dim w as integer = 480 for each i as VLCMediaTrackInfoMBS in info if i.Type = i.TrackVideo then System.DebugLog "Video track with: "+str(i.Width)+" x "+str(i.Height) w = i.Width h = i.Height end if next ImageViewer.Width = w ImageViewer.Height = h mp.VideoSetCallback w, h call mp.Play End Sub
Property Counter As Integer
Property CurrentPicture As Picture
Property m As VLCMediaMBS
Property mp As VLCMediaPlayerMBS
End Class
End Project

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