Golang and FFmpeg: Technology for real-time video stream forwarding and processing

Golang and FFmpeg: Technology to implement real-time video stream forwarding and processing requires specific code examples

Introduction:
With the rapid development of multimedia technology, video It has become an integral part of people's lives. Real-time video stream forwarding and processing technology is one of the keys to achieving high-quality video services. This article will introduce how to use Golang and FFmpeg to forward and process real-time video streams, and attach specific code examples. We hope that through the introduction of this article, readers can have a deeper understanding of real-time video stream forwarding and processing technology.

1. Introduction to Golang and FFmpeg

1. Golang:
   Golang (Go for short) is a programming language developed by Google, which is excellent for its efficiency and concurrency. Respected. Go language has good performance and is suitable for various types of application development.
2. FFmpeg:
   FFmpeg is an open source audio and video stream processing software library, which contains tools for encoding, decoding, conversion and streaming media processing. FFmpeg supports a variety of audio and video formats and has excellent performance and functionality. It is widely used in real-time video stream forwarding and processing scenarios.

2. Steps for real-time video stream forwarding and processing
Real-time video stream forwarding and processing generally include the following steps:

1. Collection:
   Use A camera or other device captures the video stream and converts it to a standard video format such as H.264.
2. Encoding:
   Encode the collected video stream and compress it into a smaller code stream for easy transmission and storage.
3. Transmission:
   Transmit the encoded video stream to the specified destination through the network, which can be a local server or a remote server.
4. Decoding:
   The receiving end decodes the video stream after receiving it, restores it to the original video frame, and performs subsequent processing and display.

3. Use Golang and FFmpeg to implement real-time video stream forwarding and processing
The following will introduce how to use Golang and FFmpeg to implement real-time video stream forwarding and processing. The following is a code example:

package main

import (
    "fmt"
    "log"
    "os"
    "os/exec"
)

func main() {
    // 采集
    captureCmd := exec.Command("ffmpeg", "-f", "avfoundation", "-i", "0", "-r", "30", "-s", "640x480", "-c:v", "libx264", "-preset", "ultrafast", "-tune", "zerolatency", "-f", "mpegts", "-")
    capturePipe, err := captureCmd.StdoutPipe()
    if err != nil {
        log.Fatal(err)
    }
    captureCmd.Stderr = os.Stderr

    // 编码
    encodeCmd := exec.Command("ffmpeg", "-i", "pipe:0", "-c:v", "copy", "-f", "mpegts", "-")
    encodePipe, err := encodeCmd.StdinPipe()
    if err != nil {
        log.Fatal(err)
    }
    encodeCmd.Stdout = os.Stdout
    encodeCmd.Stderr = os.Stderr

    // 传输
    transmitCmd := exec.Command("ffmpeg", "-i", "pipe:0", "-c:v", "copy", "-f", "mpegts", "udp://127.0.0.1:1234")
    transmitPipe, err := transmitCmd.StdinPipe()
    if err != nil {
        log.Fatal(err)
    }
    transmitCmd.Stdout = os.Stdout
    transmitCmd.Stderr = os.Stderr

    // 启动命令
    if err := captureCmd.Start(); err != nil {
        log.Fatal(err)
    }

    if err := encodeCmd.Start(); err != nil {
        log.Fatal(err)
    }

    if err := transmitCmd.Start(); err != nil {
        log.Fatal(err)
    }

    // 等待命令执行完毕
    if err := captureCmd.Wait(); err != nil {
        log.Fatal(err)
    }

    if err := encodeCmd.Wait(); err != nil {
        log.Fatal(err)
    }

    if err := transmitCmd.Wait(); err != nil {
        log.Fatal(err)
    }

    // 输出结果
    fmt.Println("视频流传输完成")
}

The above code example executes the FFmpeg command line tool by using the os/exec package in Golang. First, use the ffmpeg command to capture, encode and transmit the video stream. Finally, the forwarding and processing of real-time video streams are realized.

4. Summary
This article introduces how to use Golang and FFmpeg to implement real-time video stream forwarding and processing technology, and attaches specific code examples. Through these sample codes, readers can understand the basic steps of real-time video stream forwarding and processing, and can use Golang and FFmpeg to implement real-time video stream forwarding and processing needs. Of course, actual applications may require some adjustments and optimizations based on specific scenarios. Hope this article is helpful to readers.

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