1. ffmpeg
  2. LAV Filters
  3. libcurl
  4. madVR
  5. VSFilter
  6. youtube-dl

Third-party binaries

Some component functionality can be extended using third party binaries. All binaries and their configuration options are described below. They can be configured on Maintenance tab of component preferences.

All binaries used by component are listed in Third-party Binaries list. Each item in the list has Source property that controls where to search this binary. To change source use context menu.

All binaries have source called External. Using it you can specify path where this binary can be found. If binary is placed within foobar2000 profile or program directory, component will store path relative to that directory. This can be useful for portable installations.

Source called Managed is similar to External except that in this case component controls binaries by itself, providing the way to download these binaries and to check for updates. Managed binaries are always stored in foobar2000 profile directory.

Switching between sources requires program restart. If you have selected Managed item in context menu, after program restart it will be replaced by popup menu. Using this menu you can check for updates, download binary or delete previously downloaded version.

State of third-party binaries is printed to console at program start. Alternatively one can use Status button on Maintenance tab.


ffmpeg libraries are used to decode audio. Component has embedded ffmpeg with minimum required codecs to play audio from supported sites (represented by Internal source in the list).

If you want to use component for something that requires broader formats support you can use external ffmpeg libraries (can be downloaded here). To do that, select External source and specify directory where ffmpeg binaries are placed (component requires ffmpeg version 4.x, 32-bit build with shared libraries)

If ffmpeg source is set to LAV Filters (that is so by default), component uses ffmpeg libraries from LAV Filters. They also use ffmpeg internally, and that ffmpeg has much wider set of supported formats than the one embedded in component.

If ffmpeg source is set to anything other than Internal, and component cannot load ffmpeg from selected source, it falls back to internal ffmpeg.

LAV Filters

LAV Filters is a set of DirectShow filters based on ffmpeg. They are used for video playback.

By default LAV Filters source is set to System. That means if they are installed in the system, component will find and load them.

Two other sources (External and Managed) do not require them to be installed.

In case of Managed source LAV Filters are downloaded from original repository on GitHub. You can change repository settings using Configure item of Managed popup menu. Note, in case of Windows XP default version there is set to 0.70.2 which is the last version that supports Windows XP.

Option Force default settings tells the component to make LAV Filters not to load settings from the system (i.e. use default settings) and not to store them back.

This option exists because when local filter has newer version there is no easy way not to use global settings from older filter version installed in the system. And there is no way to display settings UI for local filter. I.e. even when local filter is used, settings UI anyway comes from the filter registered in the system. To prevent possible issues because of this, option Force default settings is enabled for local filters by default.


Component internally uses libcurl for HTTP/HTTPS communication. It is used when foo_youtube is selected as Audio decoder or Video downloader. Also it is always used at analysis.

In addition to internal libcurl one can select external DLL to be used by component. This was primarily done to be able to use different SSL backend (in internal libcurl is used Windows native SSL backend).

Ready-to-use libcurl with OpenSSL is available on Download page. You may also experiment with other existing variants that are available on cURL download page.


madVR is a high quality DirectShow video renderer.

By default madVR source is set to System so if it is installed in the system, component will use it without any additional setup.

Like with other third-party DirectShow filters External source allows to use madVR binaries without installing them in the system.

Source None tells the component not to use madVR. When any other source is selected, component unconditionally tries madVR first when adding video renderer at DirectShow graph building.


This is DirectShow filter that is used to display subtitles. Available sources are the same as in LAV Filters. Managed source uses this repository on GitHub.


youtube-dl, the way it is used by component, is application that can extract from given video page various properties like title, description, and URLs to actual media files. All this is used then by the component to provide for URLs supported by youtube-dl the same features as it provides for Youtube.

When System source is selected, component searches youtube-dl.exe in PATH. This can be useful if youtube-dl is installed via pip.

If particular URL is supported by both component and youtube-dl, component tries both ways until it gets positive result. Option Prefer youtube-dl over internal analyzer controls in this case which way is tried first.

Help Third-party binaries