Workerman development: How to implement video streaming based on UDP protocol

Workerman Development: How to realize video streaming transmission based on UDP protocol

Online video live broadcast has become an important way for consumers to obtain entertainment and information. In network video transmission, the UDP protocol is widely used because of its real-time and high efficiency. Workerman is a high-performance PHP asynchronous framework that can be used to develop high-performance network applications. It is especially suitable for implementing video streaming transmission based on UDP protocol. This article will introduce how to use Workerman to implement video streaming transmission based on UDP protocol and provide code examples. .

Implementation ideas

Using Workerman to implement video streaming transmission based on UDP protocol is mainly divided into three steps:

1. Encoding

Convert the video stream Perform compression encoding, such as using H.264 encoding format.

2. Transmission

Transmit the encoded video stream through UDP protocol.

3. Decoding

After the client receives the UDP packet, it decodes the video stream and plays the video.

Specific implementation

Let’s implement the video streaming transmission based on UDP protocol.

Server:

1. Enable UDP protocol

use WorkermanWorker;
$udpWorker = new Worker("udp://0.0.0.0:1234");

2. Receive the data packet sent by the client and broadcast

$udpWorker->onMessage = function($connection, $data){
    // 广播数据包给其他客户端
    foreach($udpWorker->connections as $clientConnection){
        $clientConnection->send($data);
    }
};

3. From the video file Read data and encode it

$spspps = ""; // SPS和PPS数据
$file = fopen("video.mp4", "rb");
while(!feof($file)){ // 从文件中读取数据并进行编码
    $data = fread($file, 4096);
    $encodedData = encode($data, $spspps);
    $udpWorker->send($encodedData);
}

function encode($data, &$spspps){
    $encodedData = "";
    // 进行H.264编码处理

    // 获取SPS和PPS数据
    if($spspps == ""){
        $pos1 = strpos($encodedData, "
g");
        $pos2 = strpos($encodedData, "
h");
        $spspps = substr($encodedData, 0, $pos2);
    }

    // 添加SPS和PPS数据到每个关键帧帧首
    if(substr($encodedData, 0, 4) == "
e"){
        $encodedData = $spspps . $encodedData;
    }

    return $encodedData;
}

fclose($file);

Client:

1. Enable UDP protocol

use WorkermanWorker;

// 创建Udp客户端对象
$client = new Worker("udp://127.0.0.1:1234");

// 启动客户端，建立连接
$client->onWorkerStart = function(){
    global $client;
    $client->connect();
};

2. Receive the data packet sent by the server and decode it

$client->onMessage = function($connection, $data){
    decode($data);
};

function decode($data){
    // 进行H.264解码处理

    // 播放视频
}

The code implementation provided in this article is for reference only. Issues such as data packet size and network delay also need to be considered in the specific implementation to ensure the stability and smoothness of video streaming transmission.

Conclusion

Workerman provides an efficient way to implement video streaming transmission based on UDP protocol, which can greatly improve video transmission efficiency and user viewing experience. This article introduces the specific steps and code examples to implement video streaming based on UDP protocol. I hope it will be helpful to developers.

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