# Source Performance Monitor

Source: https://mimolive.com/user-manual/diagnostics/performance-monitoring/source-performance-monitor/  
Last updated: 2025-10-23  
Section: Diagnostics & Troubleshooting › Performance Monitoring  

The **Source Performance Monitor** can be opened by selecting **Window** > **Source Performance Monitor**, or by using the keyboard shortcut **⌘⌥S (Command–Option–S)**.

![](https://mimolive.com/wp-content/uploads/2023/03/d908977d-26a3-41f4-802a-1a5135feb2ef.png)

This window gives you an overview of [all your sources](https://mimolive.com/user-manual/sources-input/), displaying a variety of performance data. For a typical video source, you can see the tally light state (**Tally**) (whether it is currently used for program output), the current frame rate (**FPS**) delivered from the video source to mimoLive, the expected frame rate (**Expected FPS**; reported by the video source itself), the number of **Dropped Frames** received from the source, and the **Audio Format** being used (if any).

If a video source uses filters, the monitor shows how much time each individual filter needs to compute its result (**Filter Time**). In the main row for that video source, you can also see the **overall filter computation time**.

All **visual sources**—such as video cameras, movies, or images—display their pixel dimensions (**Video Size**).
All **audio sources** display their **audio format** and **sample rate**.