EcuBus-Pro

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English

简体中文

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Replay ​

Overview ​

The Replay feature allows you to load previously recorded CAN traffic and play it back as if it were happening in real time.
This is useful for:

  • Debugging complex issues that are hard to reproduce live.
  • Analysis of diagnostic sessions and network behavior.
  • Demonstrations and training without needing a real vehicle or bench.

Note: Currently, replay only supports ASC and CAN log formats.

Replay toolbar

Online vs Offline Replay ​

  • Offline replay: You load a previously recorded log file (ASC / CAN) from disk and play it back inside the tool. No real CAN hardware or live vehicle connection is required. The messages are injected into the internal bus of the application for analysis and visualization.
  • Online replay (live streaming): Messages would be captured from a live CAN interface or vehicle in real time and immediately displayed/forwarded as they arrive. This type of live streaming / online replay is not supported yet.

Currently, EcuBus-Pro supports offline replay only.

Supported File Formats ​

  • .asc: Vector ASCII log files (CAN).

If you try to open any other format, the application will reject the file or may not show any replay data.

Opening a Replay ​

  1. Open the Network view.
  2. Add Replay node.
  3. Select an log file from your filesystem.

Network replay view

Replay Configuration ​

The Replay Configuration panel lets you fine‑tune how the replay behaves:

  • File selection: Choose the ASC file to replay.
  • Speed factor (speedFactor): Controls how fast frames are played relative to the original timestamps.
    • 1.0: normal speed (default).
    • > 1.0: faster than real time (e.g. 2.0 = 2×).
    • < 1.0: slower than real time (e.g. 0.5 = half speed).
    • 0: play as fast as possible, ignoring real-time delays.
  • Repeat count (repeatCount): Number of times the log is replayed.
    • 1: play once (default).
    • N > 1: play the entire file N times.
    • 0: loop continuously until you manually stop the replay.

Replay configuration

Channel Map ​

In the context of replay, the map refers to the mapping between ASC log channels and Ecubus devices.

  • Each log channel (e.g. channel 1, 2, …) in the ASC file can be mapped to one or more EcuBus-Pro devices.
  • During replay, frames from a given ASC channel are injected into the corresponding mapped devices.
  • This allows you to control exactly which hardware interface (or virtual device) should receive which part of the recorded traffic.

Replay channel map

Typical use cases include:

  • Mapping different ASC channels to different CAN interfaces in your project.
  • Replaying a multi-channel log into a subset of devices for focused analysis or testing.