用ffmpeg剪切视频

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package main

import (
    "fmt"
    "os"
    "os/exec"
    "path/filepath"
    "strings"
)

func main() {

    // 批量获取根目录mp4文件 并剪切相同时长片头

    rootDir := "./" // 根目录，可以根据需要修改
    err := filepath.Walk(rootDir, func(path string, info os.FileInfo, err error) error {
        if err != nil {
            fmt.Printf("Error accessing path %s: %v\n", path, err)
            return nil
        }

        if !info.IsDir() && strings.HasSuffix(info.Name(), ".mp4") {
            // 找到一个MP4文件，执行剪切操作
            inputFilePath := path
            outputFilePath := strings.TrimSuffix(path, ".mp4") + "_cut.mp4"
            err := cutVideo(inputFilePath, outputFilePath)
            if err != nil {
                fmt.Printf("Error cutting video %s: %v\n", inputFilePath, err)
            } else {
                fmt.Printf("Video %s cut successfully\n", inputFilePath)
            }
        }
        return nil
    })

    if err != nil {
        fmt.Printf("Error walking directory: %v\n", err)
    }
    fmt.Println("exit...")
}

func cutVideo(inputFilePath, outputFilePath string) error {
    // 执行ffmpeg命令来剪切视频并启用GPU加速
    cmd := exec.Command("ffmpeg", "-hwaccel", "cuda", "-i", inputFilePath, "-ss", "00:00:00", "-t", "00:00:10", "-c:v", "h264_nvenc", "-c:a", "aac", outputFilePath)
    // 裁剪掉视频的最后十秒
    // cmd := exec.Command("ffmpeg", "-hwaccel", "cuda", "-i", inputFilePath, "-vf", "trim=end_frame=10", "-c:v", "h264_nvenc", "-c:a", "aac", outputFilePath)
    // 裁剪掉最开始的十秒和最后的十秒
    // cmd := exec.Command("ffmpeg", "-i", inputFilePath, "-vf", "trim=10:duration=duration-20", "-af", "atrim=10:duration=duration-20", outputFilePath)
    cmd.Stdout = os.Stdout
    cmd.Stderr = os.Stderr
    return cmd.Run()
}