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If set, the system assumes that the core library is in the same location. The LibraryPath property can be set to the name and location of the VLC library. Normally, there should be no need to call this method manually: it will be called as soon as one of the other classes is used. It will dynamically load the VLC library as soon as its Initialize method is called.
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The VLCLibrary function gives access to a global instance of this class. Under normal circumstances, no instance of the TVLCLibrary must be created. This process can be controlled through the TVLCLibrary component. 3 Loading and initializing the library The VLC library is loaded on demand, and after loading, it must be initialized. From the description, it is clear that for each type introduced in the VLC library, there is a corresponding pascal class. It wraps the VLC libvlc_media_list_player_t type. The play list is in a TVLCMediaItems collection, and an instance of TVLCMediaPlayer is used to actually play the items in the collection.
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It TVLCMediaListPlayer is a play list manager component. TVLCMediaItems is the collection corresponding to the TVLCMediaItem item. This collection item class is a wrapper around the libvlc_media_t type in Libvlc. It has also an URL property or a FileDescriptor property for remote media. Its main property is the Path, indicating the file that needs to be played. TVLCMediaItem This class (a TCollectionItem descendent) represents 1 video or audio file or stream that can be played by the TVLCMediaPlayer class. The component is a wrapper around the VLC libvlc_media_player_t type. It contains the Play, Pause, Resume and Stop methods one expects from a video player component. TVLCMediaPlayer this is the media player: the component that actually shows the video files. It can be used to set the library location and global options of the library, and has some properties and methods that allow to get the version of the library. This component is a wrapper around the VLC libvlc_instance_t type. The vlc unit contains several classes: TVLCLibrary This class represents the loaded VLC library. If the lazvlc package is installed, then the component is registered on the component palette. lclvlc This unit contains the LCL version of the VLC player component: TLCLVLCPlayer. The unit vlc This unit contains the OOP layer around the low-level library. Functions from this unit should normally not be used, but it contains also some constants and enumerated types that must be used. 1Ģ 2 Architecture There are 3 units that must be used when using the VLC libraries: libvlc This unit contains the low-level translation of the libvlc header files (vlc.h).
Free pascal file time resolution for free#
Although everything was created for Free Pascal and Lazarus, the code should be compilable (possibly with minor adjustments) with Delphi as well.
Free pascal file time resolution install#
It will install 2 components on the component palette: A playlist manager and a media player component. Lazarus users can install the lazvlc package.
Free pascal file time resolution download#
For readers that want to try it, all relevant code is available for download as well. It is expected to be added to one of the next releases. All code has been checked in to the Subversion source archives of Free Pascal and Lazarus, but only in the development version (trunk). (a similar component exists for fpgui, an alternative to the LCL maintained by Graeme Geldenhuys). From the main component in the VLC OOP layer, a descendent was made that can be used in Lazarus: it introduces only the capability of embedding the video window in a lazarus control.
Free pascal file time resolution full#
Using the three components in the layer allows one to play videolan files without any GUI at all: the videos will be displayed in a free-floating window, or even full screen. This OOP layer matches closely the object model introduced by Videolan. The header files of the videolan library (called libvlc) have been translated to pascal, and a thin OOP layer was constructed around it. This allows you to develop your own frontend to the videolan player. The window in which the video is displayed can be embedded in another window, managed by the program that uses the library. This library (there are actually 2 libraries) can be used in other programs to display video files. It can be downloaded from Less people know that the core functionality of the VideoLan player is available in a library, which is distributed with the player, and which the player itself uses. 1 Introduction Many people know VideoLan as an excellent open source cross-platform media player: it plays an enormous amount of audio and video formats, and does this on many platforms: at least Windows, Linux and Mac OS.
Free pascal file time resolution how to#
In this contribution, we show how to display arbitrary video files using lazarus on Windows and Linux.
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1 Displaying video files using Free Pascal and Lazarus Michaël Van Canneyt NovemAbstract In a recent contribution, it was shown how video can be recorded with Lazarus on windows.