A multi-camera system, including a first camera apparatus, a second camera apparatus, and an information processing apparatus. The information processing apparatus includes a communication interface and processing circuitry. The processing circuitry is configured to receive a predetermined user input and in response to the predetermined user input, send, via the communication interface, a first control signal to the first camera apparatus that captures a first video, and send, via the communication interface, a second control signal to the second camera apparatus that captures a second video. The first control signal causes the first camera apparatus to assign first unique identifiers to frames of the first video captured by the first camera apparatus. The second control signal causes the second camera apparatus to assign second unique identifiers to frames of the second video captured by the second camera apparatus.