Playthru is for the slightly annoying case where a cheap capture card gives you a 16:9 feed and your monitor is much wider.
It fills the unused sides with a blurred version of the same frame, while keeping the real feed sharp in the middle. There is no dashboard to learn and no launcher sitting between you and the picture.
16:9 video on an ultrawide screen
Black pillars take up a surprising amount of an ultrawide display. OBS works, but using a full recording application just to watch a capture feed is overkill. Many bundled capture-card viewers are worse.
Use the picture itself as the background
The captured frame is blurred and stretched behind the sharp feed. The background follows the game in real time, so the unused space becomes part of the picture instead of a pair of black bars. Settings live behind a right-click menu.
- AudioNAudio for input passthrough (~50ms latency). Output switching uses the Windows
IPolicyConfigCOM interface. - VideoHandles capture-card quirks natively, including a fallback that copies D3D surfaces when necessary.
- SettingsSaved automatically to
%LOCALAPPDATA%\Playthru\settings.json.