Golang and FFmpeg: Technical implementation of real-time recording of online videos

Golang and FFmpeg: Technical implementation of real-time recording of online videos requires specific code examples

In recent years, with the rise of online videos, more and more Businesses and individuals are beginning to pay attention to and use real-time online video recording technology. Real-time online video recording can not only be used in application scenarios such as online education and video conferencing, but can also be used in fields such as live video broadcast and remote monitoring. This article will introduce how to use Golang and FFmpeg technology to achieve real-time recording of online videos, and provide code examples.

First, we need to understand some basic knowledge. Golang is an open source programming language that is efficient, concise, and reliable, and is suitable for rapid development of network applications. FFmpeg is a cross-platform audio and video processing tool that can encode, decode, and transcode audio and video.

The key to realizing real-time recording of network videos is to obtain the video data through the network protocol and save it to a file using FFmpeg. In this article, we will use RTSP protocol to obtain video data from a webcam. Also, for demonstration purposes, we will run the camera simulator in a local environment.

First, we need to install Golang and FFmpeg. You can download it from the official website and follow their installation guide to install it. Once the installation is complete, we can start writing code.

First, we need to use Golang's network package to connect to the RTSP server and obtain video data. The following is a simple sample code:

package main

import (
    "fmt"
    "io"
    "net"
)

func main() {
    // 连接RTSP服务器
    conn, err := net.Dial("tcp", "rtsp://192.168.0.100:554/stream")
    if err != nil {
        fmt.Println("连接RTSP服务器失败:", err)
        return
    }

    defer conn.Close()

    // 读取视频数据
    buffer := make([]byte, 1024)
    for {
        n, err := conn.Read(buffer)
        if err != nil {
            if err == io.EOF {
                fmt.Println("视频数据读取完毕")
                break
            }

            fmt.Println("读取视频数据失败:", err)
            break
        }

        // 处理视频数据，例如保存到文件中
        // ...
    }
}

In the above code, we use the Dial function in the net package to connect to the RTSP server. Among them, the first parameter is the protocol type, and the second parameter is the address of the RTSP server. Through the conn.Read function, we can continuously read the video data sent by the server.

Then, we need to use FFmpeg to save the video data to a file. The following is a sample code using FFmpeg:

package main

import (
    "fmt"
    "os/exec"
)

func main() {
    // 调用FFmpeg命令行工具
    cmd := exec.Command("ffmpeg", "-i", "rtsp://192.168.0.100:554/stream", "output.mp4")

    // 执行命令
    err := cmd.Run()
    if err != nil {
        fmt.Println("录制视频失败:", err)
        return
    }

    fmt.Println("视频录制成功")
}

In the above code, we create an instance of the FFmpeg command line tool by calling the Command function in the exec package. In the example, we specified the URL of the input video and the path of the output file. Finally, execute the FFmpeg command by calling the cmd.Run() function.

In summary, we connect to the RTSP server through Golang's network package and obtain the video data, and use FFmpeg to save it to a file, thereby realizing real-time recording of network videos. Through the above sample code, we can modify and extend it according to actual needs.

It should be noted that this article only provides simple sample code. In actual applications, issues such as concurrency processing, exception handling, and video encoding also need to be considered. Therefore, in practical applications, we need to further improve and optimize the code.

I hope this article can provide some help for you to understand how Golang and FFmpeg implement real-time recording of online videos. If you are interested in this topic, it is recommended that you continue to delve into the relevant technical documentation and code examples. I wish you good results in practice!

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