main.go

package main

import (
	"fmt"
	"os"
	"os/exec"
	"strings"
	"unicode"
)

func main() {
	text := `让座,汽车在山路上颠簸，刚上车的老大爷有些站不稳。车子满员，已经无座，有几个多余的乘客站在廊道里忍受着游来荡去地颠簸。穿黄色T恤衫的小伙子骂一句：“他妈的，刚修的水泥路没几年坏成这样,都他妈只知道偷工减料赚钱了”老大爷手紧紧抓着横杠身子游来荡去。天气有些闷热。老人家浑身散发出一股熏人的汗酸臭和泥涩味儿。`
	var data []string
	d := ""
	for _, str :=range strings.Split(text, "\n") {
		for _, t := range str {
			if !unicode.IsPunct(t) {
				d = fmt.Sprintf("%s%s", d, string(t))
			} else if unicode.IsSpace(t) {
			} else {
				if d != "" {
					data = append(data, d)
					d = ""
				}
			}
		}
	}

	// create a input file tell ffmpeg how to contact image
	fd_image, err := os.OpenFile("contact_image.txt", os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		fmt.Println("文件打开失败", err)
	}
	defer fd_image.Close()

	// create a input file tell ffmpeg how to contact audio
	fd_audio, err := os.OpenFile("contact_audio.txt", os.O_WRONLY|os.O_APPEND, 0666)
	if err != nil {
		fmt.Println("文件打开失败", err)
	}
	defer fd_audio.Close()

	for i, d := range data {
		fnImage := fmt.Sprintf("image0%d", i)
		fnAudio := fmt.Sprintf("audio0%d", i)
		s := Speech{
			Folder:   "audio",
			FileName: fnAudio,
			Language: "zh",
		}
		_ = s.GenerateAudio(d)
		img := Imager{}
		_ = img.genBaseImage(fnImage, d)

		fd_image.Write([]byte(fmt.Sprintf("file 'image/%s.jpeg'\n", fnImage)))
		duration := 0
		if len(d)/ 3 > 1 {
			duration = len(d)/ 8
		}
		fd_image.Write([]byte(fmt.Sprintf("duration %d\n", duration)))

		fd_audio.Write([]byte(fmt.Sprintf("file 'audio/%s.mp3'\n", fnAudio)))
	}

	// generate video with no
	c1 := exec.Command("ffmpeg", "-f", "concat", "-i", "contact_image.txt", "-vsync", "vfr", "-pix_fmt", "yuv420p", "video.mp4")
	err = c1.Run()
	fmt.Println(err)

	// generate audio
	c2 := exec.Command("ffmpeg", "-f", "concat", "-safe", "0", "-i", "contact_audio.txt", "-c", "copy", "output.mp3")
	err = c2.Run()
	fmt.Println(err)

	// merge video and audio
	c3 := exec.Command("ffmpeg", "-i", "video.mp4", "-i", "output.mp3", "-c:v", "copy", "-c:a", "aac", "output.mp4")
	err = c3.Run()
	fmt.Println(err)
}