Golang and FFmpeg: Push technology for online live streaming media

Golang and FFmpeg: Implementing push technology for online live streaming requires specific code examples

Abstract:
With the popularity of online live streaming, more and more Many developers are beginning to pay attention to how to implement streaming media push technology. This article will introduce how to use Golang and FFmpeg to realize the push of online live streaming media. Through specific code examples, readers will be guided step by step to understand how to build a push system based on Golang and FFmpeg.

1. Introduction to Golang language
Golang is an open source programming language developed by Google. It simplifies the programming process, provides efficient concurrency performance, and is easy to learn. One of the characteristics of Golang is that it is highly extensible, it can easily embed C/C code and interact with other programming languages.

2. Introduction to FFmpeg
FFmpeg is a powerful multimedia framework that can perform operations such as encoding, decoding, transcoding, processing and streaming of audio and video. In the field of streaming media, FFmpeg is widely used in live broadcast, recording and transcoding.

3. Preparation
Before starting, we need to install Golang and FFmpeg and ensure that they are working properly. In addition, you also need to know some basic network programming knowledge.

4. Push streaming media
In order to realize the push function of online live broadcast, we need to use Golang to develop a simple push server. Here is a sample code:

package main

import (
    "io"
    "log"
    "net/http"
    "os/exec"
)

func main() {
    http.HandleFunc("/", handleRequest)
    log.Fatal(http.ListenAndServe(":8080", nil))
}

func handleRequest(w http.ResponseWriter, r *http.Request) {
    cmd := exec.Command("ffmpeg", "-i", "video.mp4", "-f", "flv", "rtmp://live.example.com/app/streamKey")
    outPipe, err := cmd.StdoutPipe()
    if err != nil {
        log.Fatal(err)
    }

    err = cmd.Start()
    if err != nil {
        log.Fatal(err)
    }

    go func() {
        _, err = io.Copy(w, outPipe)
        if err != nil {
            log.Fatal(err)
        }
    }()

    cmd.Wait()
}

In the above code, we use the http.HandleFunc function to handle the HTTP request and the exec.Command function to create a FFmpeg process, used to push video files to the designated RTMP streaming server. The cmd.StdoutPipe function is used to obtain the output stream of the FFmpeg process and write it to http.ResponseWriter.

5. Start the push server
Save the above code as the main.go file, and run the server through the following command:

go run main.go

At this time, the push server will Start running and listen for HTTP requests from clients. Whenever an HTTP request arrives, the FFmpeg process will be started and the video file content will be pushed to the specified RTMP streaming server.

6. Precautions for pushing streaming media
In actual applications, you also need to pay attention to the following points:

1. Make sure that the installation path of FFmpeg is correct and in the system The environment variables are correctly configured.
2. Modify the listening address and port of the push server according to actual needs.
3. Replace rtmp://live.example.com/app/streamKey with the actual streaming server address and push code.
4. Prepare video files for push in advance.

7. Summary
This article introduces how to use Golang and FFmpeg to implement push technology for online live streaming media. Through Golang's efficient concurrency performance and FFmpeg's powerful multimedia processing capabilities, we can easily build a reliable streaming media push system. I hope this article will be helpful for developers to implement the online live streaming media push function.

References:

• Golang official website: https://golang.org/
• FFmpeg official website: https://ffmpeg.org/

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