295 lines
8.0 KiB
Go
295 lines
8.0 KiB
Go
package video_server
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import (
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"sort"
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"strconv"
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"strings"
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"time"
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"FireLeave_tool/logger"
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)
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// MergeVideo 合并视频文件 - 完全适配 mp4_merge --out 模式
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func MergeVideo(deviceUUID string, alarmTime int64) (string, error) {
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videoDir := fmt.Sprintf("/usr/data/camera/%s", deviceUUID)
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if _, err := os.Stat(videoDir); os.IsNotExist(err) {
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return "", fmt.Errorf("video directory not exist: %s", videoDir)
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}
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// === 1. 时间对齐到 10 秒 ===
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alarmTimeAligned := alignTo10Seconds(alarmTime)
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alarmTimeStr := time.Unix(alarmTimeAligned, 0).Format("20060102150405")
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beforeTime := alarmTimeAligned - 10
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afterTime := alarmTimeAligned + 10
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beforeStr := time.Unix(beforeTime, 0).Format("20060102150405")
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afterStr := time.Unix(afterTime, 0).Format("20060102150405")
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paths := map[string]string{
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beforeStr: filepath.Join(videoDir, beforeStr+".mp4"),
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alarmTimeStr: filepath.Join(videoDir, alarmTimeStr+".mp4"),
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afterStr: filepath.Join(videoDir, afterStr+".mp4"),
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}
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videoFiles := []string{}
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for name, path := range paths {
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if _, err := os.Stat(path); err == nil {
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videoFiles = append(videoFiles, path)
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logger.Logger.Printf("Found video: %s", name+".mp4")
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} else {
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logger.Logger.Printf("Missing video: %s", name+".mp4")
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}
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}
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// === 2. 补充替代文件 ===
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if len(videoFiles) < 3 {
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allFiles, _ := os.ReadDir(videoDir)
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var candidates []struct {
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path string
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ts int64
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}
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for _, f := range allFiles {
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if !f.IsDir() && strings.HasSuffix(f.Name(), ".mp4") && !strings.Contains(f.Name(), "_joined") {
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if ts, err := parseSimpleTimestamp(f.Name()); err == nil {
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candidates = append(candidates, struct {
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path string
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ts int64
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}{filepath.Join(videoDir, f.Name()), ts})
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}
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}
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}
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targets := []int64{beforeTime, alarmTimeAligned, afterTime}
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for _, target := range targets {
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if containsTimestamp(videoFiles, target) {
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continue
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}
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closest := findClosest(candidates, target)
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if closest != "" && !contains(videoFiles, closest) {
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videoFiles = append(videoFiles, closest)
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logger.Logger.Printf("Using fallback: %s", filepath.Base(closest))
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}
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}
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}
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if len(videoFiles) < 2 {
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return "", fmt.Errorf("insufficient video files: %d", len(videoFiles))
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}
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// === 3. 排序 ===
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sort.Slice(videoFiles, func(i, j int) bool {
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return getTimestampFromPath(videoFiles[i]) < getTimestampFromPath(videoFiles[j])
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})
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logger.Logger.Printf("Merging %d videos:", len(videoFiles))
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for i, f := range videoFiles {
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logger.Logger.Printf(" [%d] %s", i, filepath.Base(f))
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}
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// === 4. 显式指定输出文件（100% 可控）===
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outputFile := fmt.Sprintf("%s.mp4_joined.mp4", alarmTimeStr)
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joinedPath := filepath.Join(videoDir, outputFile)
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// 清理旧文件（防止冲突）
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if err := os.Remove(joinedPath); err != nil && !os.IsNotExist(err) {
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logger.Logger.Printf("Failed to remove old output file %s: %v", joinedPath, err)
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}
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// === 5. 调用 mp4_merge，显式 --out ===
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args := append(videoFiles, "--out", joinedPath)
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cmd := exec.Command("mp4_merge", args...)
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cmd.Stdout = logger.Logger.Writer()
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cmd.Stderr = logger.Logger.Writer()
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if err := cmd.Run(); err != nil {
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return "", fmt.Errorf("mp4_merge failed: %v", err)
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}
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// === 6. 验证输出文件存在 ===
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if _, err := os.Stat(joinedPath); err != nil {
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return "", fmt.Errorf("output file not created: %s, error: %v", joinedPath, err)
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}
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info, err := os.Stat(joinedPath)
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if err != nil {
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return "", fmt.Errorf("stat output file failed: %v", err)
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}
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logger.Logger.Printf("Merged file created: %s (size: %d bytes)", outputFile, info.Size())
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// === 7. 移动到 /data/upload/ ===
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t := time.Unix(alarmTimeAligned, 0)
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year, month, day := t.Date()
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timestampPart := fmt.Sprintf("%d-%d-%d-%d", year, int(month), day, alarmTimeAligned)
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finalName := fmt.Sprintf("%s-%s.MP4", deviceUUID, timestampPart)
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finalPath := filepath.Join("/data/upload", finalName)
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if err := os.MkdirAll("/data/upload", 0755); err != nil {
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return "", fmt.Errorf("create /data/upload failed: %v", err)
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}
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// 跨分区复制 + 删除
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if err := copyFile(joinedPath, finalPath); err != nil {
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return "", fmt.Errorf("copy failed: %v", err)
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}
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if err := os.Remove(joinedPath); err != nil {
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logger.Logger.Printf("Failed to delete temp file %s: %v", joinedPath, err)
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}
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logger.Logger.Printf("Video merged and moved successfully: %s", finalPath)
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return finalPath, nil
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}
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// containsTimestamp 检查是否已有该时间戳
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func containsTimestamp(files []string, ts int64) bool {
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for _, f := range files {
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if getTimestampFromPath(f) == ts {
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return true
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}
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}
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return false
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}
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// findClosest 查找最接近的时间戳文件
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func findClosest(candidates []struct {
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path string
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ts int64
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}, target int64) string {
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var best string
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var minDiff int64 = 1<<63 - 1
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for _, c := range candidates {
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diff := abs(c.ts - target)
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if diff < minDiff {
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minDiff = diff
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best = c.path
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}
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}
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if minDiff <= 30 {
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return best
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}
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return ""
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}
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func abs(x int64) int64 {
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if x < 0 {
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return -x
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}
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return x
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}
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// copyFile 支持跨分区复制
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func copyFile(src, dst string) error {
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in, err := os.Open(src)
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if err != nil {
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return err
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}
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defer in.Close()
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out, err := os.Create(dst)
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if err != nil {
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return err
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}
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defer out.Close()
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if _, err = io.Copy(out, in); err != nil {
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return err
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}
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return out.Sync()
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}
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// alignTo10Seconds 将时间对齐到最近的10秒间隔
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func alignTo10Seconds(timestamp int64) int64 {
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t := time.Unix(timestamp, 0)
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// 获取秒数并对齐到10秒
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seconds := t.Second()
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alignedSeconds := (seconds / 10) * 10
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// 创建新的时间
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alignedTime := time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), alignedSeconds, 0, t.Location())
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return alignedTime.Unix()
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}
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// parseSimpleTimestamp 解析简单的时间戳文件名 (如: 20251029181740.mp4)
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func parseSimpleTimestamp(filename string) (int64, error) {
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// 移除文件扩展名
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nameWithoutExt := strings.TrimSuffix(filename, filepath.Ext(filename))
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// 文件名应该就是14位时间戳
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if len(nameWithoutExt) != 14 {
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//return 0, fmt.Errorf("无效的时间戳格式: %s (期望14位数字)", nameWithoutExt)
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}
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// 解析时间戳
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year, _ := strconv.Atoi(nameWithoutExt[0:4])
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month, _ := strconv.Atoi(nameWithoutExt[4:6])
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day, _ := strconv.Atoi(nameWithoutExt[6:8])
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hour, _ := strconv.Atoi(nameWithoutExt[8:10])
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minute, _ := strconv.Atoi(nameWithoutExt[10:12])
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second, _ := strconv.Atoi(nameWithoutExt[12:14])
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t := time.Date(year, time.Month(month), day, hour, minute, second, 0, time.Local)
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return t.Unix(), nil
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}
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// getTimestampFromPath 从文件路径中提取时间戳
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func getTimestampFromPath(filePath string) int64 {
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filename := filepath.Base(filePath)
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timestamp, err := parseSimpleTimestamp(filename)
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if err != nil {
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return 0
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}
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return timestamp
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}
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// contains 检查切片是否包含某个元素
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func contains(slice []string, item string) bool {
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for _, s := range slice {
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if s == item {
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return true
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}
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}
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return false
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}
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// CleanupOldVideos 清理旧的合并视频文件，保留最近的 10 个
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func CleanupOldVideos(deviceUUID string) {
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const maxFiles = 10
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videoDir := "/data/upload"
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prefix := fmt.Sprintf("%s_", deviceUUID)
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files, err := os.ReadDir(videoDir)
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if err != nil {
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logger.Logger.Printf("read the signals %s Error: %v", videoDir, err)
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return
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}
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var videoFiles []os.DirEntry
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for _, file := range files {
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if strings.HasPrefix(file.Name(), prefix) && strings.HasSuffix(file.Name(), "_merged.mp4") {
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videoFiles = append(videoFiles, file)
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}
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}
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if len(videoFiles) <= maxFiles {
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return
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}
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sort.Slice(videoFiles, func(i, j int) bool {
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infoI, _ := videoFiles[i].Info()
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infoJ, _ := videoFiles[j].Info()
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return infoI.ModTime().Before(infoJ.ModTime())
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})
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for i := 0; i < len(videoFiles)-maxFiles; i++ {
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filePath := filepath.Join(videoDir, videoFiles[i].Name())
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if err := os.Remove(filePath); err != nil {
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logger.Logger.Printf("Clean up old videos %s Error: %v", filePath, err)
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} else {
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logger.Logger.Printf("Clean up old videos: %s", filePath)
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}
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}
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}
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