Understand the streaming media server and video transmission technology in PHP

Understand the streaming media server and video transmission technology in PHP

Streaming media technology plays an important role in the modern Internet, enabling users to play audio and video content in real time. As a server-side scripting language, PHP can also be used to build streaming media servers and implement video transmission. This article will introduce how to use PHP to build a streaming media server and implement video transmission, and provide corresponding code examples.

1. Construction of streaming media server

First of all, we need a server software that supports streaming media transmission, such as Nginx or Apache. Here, we take Nginx as an example to demonstrate how to configure the streaming media server.

1. Install Nginx

First, you need to install Nginx. Under Ubuntu system, you can use the following command to install:

sudo apt-get update
sudo apt-get install nginx

2. Configure Nginx

Open the Nginx configuration file and add the following content:

rtmp {
    server {
        listen 1935;
        chunk_size 4000;
        application live {
            live on;
            record off;
        }
    }
}

In the above configuration, listen 1935 specifies the listening port of the streaming media server as 1935, and application live indicates that the name of the streaming media application is "live". It can be modified according to actual needs.

After saving and closing the configuration file, use the following command to restart Nginx:

sudo service nginx restart

3. Push and play

Use streaming media push software (such as OBS) pushes video files to the streaming server. The push address is rtmp://your_server_ip/live/stream_name, where your_server_ip is the server IP address and stream_name is the name of the video stream. After the push is successful, you can use a streaming media player such as VLC to play the pushed video stream.

2. Implementation of video transmission

After understanding the construction of the streaming media server, we can use PHP to implement video transmission. Below is a simple PHP code example that demonstrates how to use PHP to implement video transmission.

<?php
// 指定视频文件的路径和类型
$videoFile = 'video.mp4';
$videoType = 'video/mp4';

// 设置缓冲区的大小
ob_start();
header("Content-Type: $videoType");
header('Content-Length: ' . filesize($videoFile));

// 读取视频文件并输出
readfile($videoFile);
flush();
ob_end_clean();
?>

In the above code, the path and type of the video file are first specified. Then, the output buffer is opened through the ob_start() function, and the Content-Type and Content-Length header information is set so that the browser can correctly parse and play the video. .

Next, use the readfile() function to read the video file, and use the flush() and ob_end_clean() functions to refresh the buffer and Output video content.

Save the above code as a video.php file, and place the video file in the same directory as video.php. Then, visit video.php in the browser to achieve video transmission.

Summary

This article introduces how to use PHP to build a streaming media server and implement video transmission. By establishing a streaming media server, video content can be pushed to users for playback in real time. Video transmission is achieved through PHP, and videos can be embedded in web pages to achieve online playback functions. I hope this article can help readers understand the streaming media server and video transmission technology in PHP.

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