Golang与FFmpeg: 实现直播推流的技术实现

package main

import (
    "github.com/giorgisio/goav/avcodec"
    "github.com/giorgisio/goav/avdevice"
    "github.com/giorgisio/goav/avformat"
)

func main() {
    // 初始化 FFmpeg
    avformat.AvRegisterAll()
    avdevice.AvdeviceRegisterAll()

    // 打开输入设备
    ctx := avformat.AvformatAllocContext()
    if avformat.AvformatOpenInput(&ctx, "/dev/video0", nil, nil) != 0 {
        panic("Failed to open input device")
    }

    // 查找视频流
    if avformat.AvformatFindStreamInfo(ctx, nil) != 0 {
        panic("Failed to find stream info")
    }

    // 获取视频流
    videoStream := -1
    for i := 0; i < int(ctx.NbStreams()); i++ {
        if ctx.Streams()[i].CodecParameters().CodecType() == avformat.AVMEDIA_TYPE_VIDEO {
            videoStream = i
            break
        }
    }

    // 从视频流中读取数据
    packet := avcodec.AvPacketAlloc()
    for avformat.AvReadFrame(ctx, packet) == 0 {
        if packet.StreamIndex() == int32(videoStream) {
            // 处理视频数据
            // ...

        }
        packet.AvPacketUnref()
    }

    // 释放资源
    avformat.AvformatCloseInput(&ctx)
    ctx.AvformatFreeContext()
    packet.AvPacketFree()
}

package main

import (
    "fmt"
    "github.com/giorgisio/goav/avcodec"
)

func main() {
    // 初始化 FFmpeg
    avcodec.AvcodecRegisterAll()

    // 创建编码器上下文
    codec := avcodec.AvcodecFindEncoder(avcodec.CodecId(avcodec.AV_CODEC_ID_AAC))
    if codec == nil {
        panic("Failed to find encoder")
    }
    context := codec.AvcodecAllocContext3()
    defer context.AvcodecFreeContext()

    // 设置编码参数
    context.SetBitRate(64000)
    context.SetSampleFmt(avcodec.AV_SAMPLE_FMT_FLTP)
    context.SetSampleRate(44100)
    context.SetChannels(2)
    context.SetChannelLayout(avcodec.AV_CH_LAYOUT_STEREO)

    // 打开编码器
    if context.AvcodecOpen2(codec, nil) < 0 {
        panic("Failed to open encoder")
    }

    // 准备输入数据
    frame := avcodec.AvFrameAlloc()
    frame.SetSampleFmt(avcodec.AV_SAMPLE_FMT_FLTP)
    frame.SetSampleRate(44100)
    frame.SetChannels(2)
    frame.SetChannelLayout(avcodec.AV_CH_LAYOUT_STEREO)

    // 编码数据
    inputSamples := 1024
    data := make([]int16, inputSamples)
    // 填充音频数据
    // ...

    frame.AvFrameGetBuffer(0)
    frame.AvFrameMakeWritable()
    defer frame.AvFrameFree()

    // 发送数据到编码器
    if context.AvcodecSendFrame(frame) < 0 {
        panic("Failed to send frame")
    }

    // 接收编码后的数据
    packet := avcodec.AvPacketAlloc()
    defer packet.AvPacketFree()

    // 接收编码后的数据
    if context.AvcodecReceivePacket(packet) < 0 {
        panic("Failed to receive packet")
    }
    // 处理编码后的数据
    // ...

    fmt.Println("Encode successfully!")
}

package main

import (
    "net"
)

func main() {
    // 连接服务器
    conn, err := net.Dial("tcp", "127.0.0.1:6666")
    if err != nil {
        panic("Failed to connect to server")
    }
    defer conn.Close()

    // 发送数据
    data := []byte("Hello, server!")
    _, err = conn.Write(data)
    if err != nil {
        panic("Failed to send data")
    }
}