Timing metadata is generated and added to captured video to compensate for synchronization error between video captured concurrently from multiple cameras. A wireless beacon including timer data is transmitted from an access point to each station camera. A radio circuit of the station camera synchronizes to the timer of the access point based on timing information in the wireless beacon. An image processor in each station camera includes an image processor timer separate from the radio circuit timer. During video capture, timing metrics are generated indicating deviation between the image processor timer and the radio circuit timer. The timing metrics are stored as metadata and can be used to compensate for synchronization error in post-processing.