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, $data){
    // 廣播數(shù)據(jù)包給其他客戶端
    foreach($udpWorker->connections as $clientConnection){
        $clientConnection->send($data);
    }
};

3. From the video file Read data and encode it

$spspps = ""; // SPS和PPS數(shù)據(jù)
$file = fopen("video.mp4", "rb");
while(!feof($file)){ // 從文件中讀取數(shù)據(jù)并進行編碼
    $data = fread($file, 4096);
    $encodedData = encode($data, $spspps);
    $udpWorker->send($encodedData);
}

function encode($data, &$spspps){
    $encodedData = "";
    // 進行H.264編碼處理

    // 獲取SPS和PPS數(shù)據(jù)
    if($spspps == ""){
        $pos1 = strpos($encodedData, "
g");
        $pos2 = strpos($encodedData, "
h");
        $spspps = substr($encodedData, 0, $pos2);
    }

    // 添加SPS和PPS數(shù)據(jù)到每個關鍵幀幀首
    if(substr($encodedData, 0, 4) == "
e"){
        $encodedData = $spspps . $encodedData;
    }

    return $encodedData;
}

fclose($file);

Client:

1. Enable UDP protocol

use WorkermanWorker;

// 創(chuàng)建Udp客戶端對象
$client = new Worker("udp://127.0.0.1:1234");

// 啟動客戶端，建立連接
$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){
    // 進行H.264解碼處理

    // 播放視頻
}

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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