Live Streaming for SUP Race 2020 in Chengdu

Jan 25, 2021

On September 25th, the 2020 Tianfu Greenway SUP Standup Paddleboard Tournament kicked off in Chengdu, the second year in a row that the city has hosted the tournament. The event was held at Chengdu Tianfu Greenway Jincheng Lake Park, and was live streaming online.

1. What is the SUP Paddleboard Race?

Stand up paddleboarding, or SUP, is a water sport born from surfing with modern roots in Hawaii. Stand up paddle boarders stand on boards that are floating on the water, and use a paddle to propel themselves through the water. The sport was documented in a 2013 report that identified it as the outdoor sporting activity with the most first-time participants in the United States that year. Variations include flat water paddling, racing, surfing, whitewater SUP, yoga, and fishing.

2. Challenges to live streaming of water sports events

In the SUP Paddleboard Race, the event was held in a relatively wide water area, which made it more difficult for the live streaming deployment.

First, the water area of the event is large, due to the terrain factors, traditional wiring is difficult and costly, so it cannot effectively meet the needs of the live streaming event.

Second, the event has more than one player at the same time, need multiple angles, multiple machine to different players for real-time live streaming, ordinary wireless video transmission can not support multi-channel video transmission.

Third, because it is paddle boarding on the water, there are more sports shots, requiring the videographer to move.

3. Thunder+BeamLink-Quad, no need to afraid of the challenge of “live streaming on the water”

Before the start of the event, the crew deployed cameras on shore and the boat, depending on the site conditions. Among them, three cameras were deployed on shore and one camera was deployed on the boat. Since some of the cameras on shore are far away from the switch console, and there are trees and terrain in the middle of the obstruction, there is a risk that ordinary video transmission is difficult to stabilize the transmission. Therefore, the live streaming team finally used the CVW “BeamLink-Quad + Thunder” cascade program to achieve multi-camera, long-distance live streaming purpose.

Deployment ways are as follows:

1. The staff deployed three cameras on shore (camera 1, 2 and 3 respectively) to cover the entire race area as far as possible, in order to better film the overall situation of the race; at the same time, another camera (camera 4) was deployed on the boat outside the race area to track and film the participants.

The camera deployment diagram

BeamLink-Quad transmitters are deployed on the shore with cameras

 

The Thunder transmitter is deployed on the shore with a camera

2. The camera-1 (see the camera deployment diagram) is connected to the Thunder transmitter. Then the Thunder receiver is connected to the BeamLink-Quad transmitter via the SDI cable. Through the video signal is transmitted to the BeamLink-Quad receiver in such a cascading way, for longer-distance transmission.

Camera-2 and camera-4 are connected to the BeamLink-Quad Transmitters to transmit video signals to the BeamLink-Quad receiver. Camera-3, which is close to the switch console, is connected directly by cable.

 

The Thunder receiver is connected to the BeamLink-Quad transmitter for cascading signal transmission

3. BeamLink-Quad receiver is deployed next to the switch console, receiving three video signals through the SDI/HDMI cables. The real-time video was edited by the switch console, then the switch console streamed it directly to the live-streaming platform by RTSP mode.

 

The BeamLink-Quad receiver was deployed close to the switch console to live stream the game

4. Summary

The video signal remains stable throughout the live event. After the live event, the organizers gave high praise to the stable performance of the BeamLink-Quad and Thunder.

Compared with the previous wireless video transmission solution, the BeamLink-Quad and Thunder cascade scheme has the following advantages:

1. Support multi-camera wireless transmission, no complicated wiring, greatly reduce labor costs and time costs;

2. Through the BeamLink-Quad and Thunder cascade, to achieve longer-distance video transmission;

3. Excellent stability and anti-jamming ability to make live stream more efficient and simple!