recordandplaybackværktøjer

Recordandplayback (often written as record-and-playback or recordandplayback) describes a technique in which a sequence of inputs, events, or signals is captured and later reproduced. It spans software, hardware, and media domains, and can refer to both interactive playback of user actions and automatic replay of system events for testing, debugging, or demonstration.

In software testing and GUI automation, record-and-playback tools let users generate test scripts by recording real user actions within an application. During playback, those actions are simulated to exercise the same flows. Advantages include ease of test creation and rapid prototyping; drawbacks include fragility to UI changes and limited handling of dynamic content. Best practices include parameterizing inputs, modular scripts, and maintaining separate data.

In debugging and systems research, record-and-replay or deterministic record-and-replay captures inputs, thread scheduling, and other nondeterministic events to reproduce a bug exactly. Tools range from virtual machines to specialized recorders; in Linux, rr is a well-known record-and-replay debugger. In concurrent systems, such approaches facilitate debugging by removing nondeterminism.

In hardware and media, devices and workflows use record-and-playback for capturing audio/video streams, sensor data, or robotic motion, and then replaying it for analysis, training, or operation repeatability. In robotics, recorded trajectories allow repeatable demonstrations without reprogramming.

Limitations include the need for precise capture of timing, potential privacy concerns with captured data, and performance overhead. The term encompasses both user-initiated playback and automated recording for reproducibility.