mirror of
https://github.com/langhuihui/monibuca.git
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599 lines
18 KiB
Go
Executable File
599 lines
18 KiB
Go
Executable File
package plugin_snap
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"image"
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"image/color"
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_ "image/jpeg"
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"net/http"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"time"
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"github.com/disintegration/imaging"
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m7s "m7s.live/v5"
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"m7s.live/v5/pkg"
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"m7s.live/v5/pkg/util"
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snap_pkg "m7s.live/v5/plugin/snap/pkg"
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"m7s.live/v5/plugin/snap/pkg/watermark"
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)
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const (
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MacFont = "/System/Library/Fonts/STHeiti Light.ttc" // mac字体路径
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LinuxFont = "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc" // linux字体路径 思源黑体
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WinFont = "C:/Windows/Fonts/msyh.ttf" // windows字体路径 微软雅黑
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)
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func parseRGBA(rgba string) (color.RGBA, error) {
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rgba = strings.TrimPrefix(rgba, "rgba(")
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rgba = strings.TrimSuffix(rgba, ")")
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parts := strings.Split(rgba, ",")
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if len(parts) != 4 {
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return color.RGBA{}, fmt.Errorf("invalid rgba format")
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}
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r, _ := strconv.Atoi(strings.TrimSpace(parts[0]))
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g, _ := strconv.Atoi(strings.TrimSpace(parts[1]))
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b, _ := strconv.Atoi(strings.TrimSpace(parts[2]))
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a, _ := strconv.ParseFloat(strings.TrimSpace(parts[3]), 64)
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return color.RGBA{uint8(r), uint8(g), uint8(b), uint8(a * 255)}, nil
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}
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// snap 方法负责实际的截图操作
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func (p *SnapPlugin) snap(publisher *m7s.Publisher, watermarkConfig *snap_pkg.WatermarkConfig) (*bytes.Buffer, error) {
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// 获取视频帧
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annexb, err := snap_pkg.GetVideoFrame(publisher, p.Server)
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if err != nil {
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return nil, err
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}
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// 处理视频帧生成图片
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buf := new(bytes.Buffer)
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if err := snap_pkg.ProcessWithFFmpeg(annexb, buf); err != nil {
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return nil, err
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}
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// 如果设置了水印文字，添加水印
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if watermarkConfig != nil && watermarkConfig.Text != "" {
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// 加载字体
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if err := watermarkConfig.LoadFont(); err != nil {
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return nil, fmt.Errorf("load watermark font failed: %w", err)
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}
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// 解码图片
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img, _, err := image.Decode(bytes.NewReader(buf.Bytes()))
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if err != nil {
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return nil, fmt.Errorf("decode image failed: %w", err)
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}
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// 添加水印
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result, err := watermark.DrawWatermarkSingle(img, watermark.TextConfig{
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Text: watermarkConfig.Text,
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Font: watermarkConfig.Font,
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FontSize: watermarkConfig.FontSize,
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Spacing: watermarkConfig.FontSpacing,
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RowSpacing: 10,
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ColSpacing: 20,
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Rows: 1,
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Cols: 1,
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DPI: 72,
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Color: watermarkConfig.FontColor,
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IsGrid: false,
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Angle: 0,
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OffsetX: watermarkConfig.OffsetX,
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OffsetY: watermarkConfig.OffsetY,
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}, false)
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if err != nil {
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return nil, fmt.Errorf("add watermark failed: %w", err)
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}
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// 清空原buffer并写入新图片
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buf.Reset()
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if err := imaging.Encode(buf, result, imaging.JPEG); err != nil {
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return nil, fmt.Errorf("encode image failed: %w", err)
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}
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}
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return buf, nil
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}
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func (p *SnapPlugin) doSnap(rw http.ResponseWriter, r *http.Request) {
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streamPath := r.PathValue("streamPath")
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isUrl := r.URL.Query().Get("isUrl")
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// 获取发布者
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publisher, err := p.Server.GetPublisher(streamPath)
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if err != nil {
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http.Error(rw, pkg.ErrNotFound.Error(), http.StatusNotFound)
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return
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}
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// 获取查询参数
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query := r.URL.Query()
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// 从查询参数中获取水印配置
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var watermarkConfig *snap_pkg.WatermarkConfig
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watermarkText := query.Get("watermark")
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if watermarkText != "" {
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fontPath := query.Get("fontPath")
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if fontPath == "" {
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switch {
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case strings.Contains(runtime.GOOS, "darwin"):
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fontPath = MacFont
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case strings.Contains(runtime.GOOS, "linux"):
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fontPath = LinuxFont
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case strings.Contains(runtime.GOOS, "windows"):
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fontPath = WinFont
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}
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}
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watermarkConfig = &snap_pkg.WatermarkConfig{
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Text: watermarkText,
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FontPath: fontPath,
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FontSize: parseFloat64(query.Get("fontSize"), 36),
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FontSpacing: parseFloat64(query.Get("fontSpacing"), 2),
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OffsetX: parseInt(query.Get("offsetX"), 0),
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OffsetY: parseInt(query.Get("offsetY"), 0),
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}
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// 解析颜色
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if fontColor := query.Get("fontColor"); fontColor != "" {
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if color, err := parseRGBA(fontColor); err == nil {
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watermarkConfig.FontColor = color
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}
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}
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}
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// 调用 snap 进行截图
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buf, err := p.snap(publisher, watermarkConfig)
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if err != nil {
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p.Error("snap failed", "error", err.Error())
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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// 处理保存逻辑
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savePath := query.Get("savePath")
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now := time.Now()
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if savePath != "" {
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os.Mkdir(savePath, 0755)
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filename := fmt.Sprintf("%s_%s.jpg", streamPath, now.Format("20060102150405.000"))
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filename = strings.ReplaceAll(filename, "/", "_")
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savePath = filepath.Join(savePath, filename)
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// 保存到本地
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if err := os.WriteFile(savePath, buf.Bytes(), 0644); err != nil {
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p.Error("save snapshot failed", "error", err.Error())
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savePath = ""
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}
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// 保存截图记录到数据库
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if p.DB != nil && savePath != "" {
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record := snap_pkg.SnapRecord{
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StreamName: streamPath,
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SnapMode: 2, // HTTP请求截图模式
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SnapTime: now,
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SnapPath: savePath,
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}
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if err := p.DB.Create(&record).Error; err != nil {
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p.Error("save snapshot record failed", "error", err.Error())
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}
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}
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}
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if isUrl == "1" && savePath != "" {
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url := fmt.Sprintf("http://%s/snap/query/%s?snapTime=%d", "localhost:8080", streamPath, now.Unix())
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data := map[string]string{
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"url": url,
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"markdown": fmt.Sprintf("", streamPath, url),
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}
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rw.Header().Set("Content-Type", "application/json")
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if err := json.NewEncoder(rw).Encode(data); err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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}
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} else {
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// 返回图片
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rw.Header().Set("Content-Type", "image/jpeg")
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rw.Header().Set("Content-Length", strconv.Itoa(buf.Len()))
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if _, err := buf.WriteTo(rw); err != nil {
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p.Error("write response failed", "error", err.Error())
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}
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}
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}
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// 辅助函数：解析浮点数
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func parseFloat64(s string, defaultValue float64) float64 {
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if s == "" {
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return defaultValue
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}
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v, err := strconv.ParseFloat(s, 64)
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if err != nil {
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return defaultValue
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}
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return v
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}
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// 辅助函数：解析整数
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func parseInt(s string, defaultValue int) int {
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if s == "" {
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return defaultValue
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}
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v, err := strconv.Atoi(s)
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if err != nil {
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return defaultValue
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}
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return v
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}
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func (p *SnapPlugin) querySnap(rw http.ResponseWriter, r *http.Request) {
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if p.DB == nil {
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http.Error(rw, "database not initialized", http.StatusInternalServerError)
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return
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}
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streamPath := r.PathValue("streamPath")
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if streamPath == "" {
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http.Error(rw, "streamPath is required", http.StatusBadRequest)
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return
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}
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snapTimeStr := r.URL.Query().Get("snapTime")
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if snapTimeStr == "" {
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http.Error(rw, "snapTime is required", http.StatusBadRequest)
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return
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}
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snapTimeUnix, err := strconv.ParseInt(snapTimeStr, 10, 64)
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if err != nil {
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http.Error(rw, "invalid snapTime format, should be unix timestamp", http.StatusBadRequest)
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return
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}
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targetTime := time.Unix(snapTimeUnix+1, 0)
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var record snap_pkg.SnapRecord
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// 查询小于等于目标时间的最近一条记录
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if err := p.DB.Where("stream_name = ? AND snap_time <= ?", streamPath, targetTime).
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Order("id DESC").
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First(&record).Error; err != nil {
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http.Error(rw, "snapshot not found", http.StatusNotFound)
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return
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}
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// 计算时间差（秒）
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timeDiff := targetTime.Sub(record.SnapTime).Seconds()
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if timeDiff > float64(time.Duration(p.QueryTimeDelta)*time.Second) {
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http.Error(rw, "no snapshot found within time delta", http.StatusNotFound)
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return
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}
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// 读取图片文件
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imgData, err := os.ReadFile(record.SnapPath)
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if err != nil {
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http.Error(rw, "failed to read snapshot file", http.StatusNotFound)
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return
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}
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rw.Header().Set("Content-Type", "image/jpeg")
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rw.Header().Set("Content-Length", strconv.Itoa(len(imgData)))
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rw.Write(imgData)
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}
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// BatchSnapRequest 批量截图请求结构体
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type BatchSnapRequest struct {
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StartTime string `json:"startTime"` // 开始时间 UTC格式
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EndTime string `json:"endTime"` // 结束时间 UTC格式
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Granularity int `json:"granularity"` // 颗粒度(间隔秒数)，0表示按关键帧
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}
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// BatchSnapResponse 批量截图响应结构体
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type BatchSnapResponse struct {
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Success bool `json:"success"`
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Message string `json:"message,omitempty"`
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}
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// batchSnap 处理批量截图请求
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func (p *SnapPlugin) batchSnap(rw http.ResponseWriter, r *http.Request) {
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// 只接受GET请求
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if r.Method != http.MethodGet {
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http.Error(rw, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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// 获取streamPath
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streamPath := r.PathValue("streamPath")
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if streamPath == "" {
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responseWithError(rw, "streamPath is required")
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return
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}
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// 获取查询参数
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query := r.URL.Query()
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// 解析时间范围
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startTime, endTime, err := util.TimeRangeQueryParse(query)
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if err != nil {
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responseWithError(rw, "Invalid time range: "+err.Error())
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return
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}
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// 验证时间范围
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if endTime.Before(startTime) {
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responseWithError(rw, "endTime must be after startTime")
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return
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}
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// 获取granularity参数
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granularity := 0
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granularityStr := query.Get("granularity")
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if granularityStr != "" {
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granularityVal, err := strconv.Atoi(granularityStr)
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if err != nil {
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responseWithError(rw, "Invalid granularity format: "+err.Error())
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return
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}
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if granularityVal < 0 {
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responseWithError(rw, "granularity must be non-negative")
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return
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}
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granularity = granularityVal
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}
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// 获取发布者
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publisher, err := p.Server.GetPublisher(streamPath)
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if err != nil {
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responseWithError(rw, "Stream not found")
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return
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}
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// 创建保存目录
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savePath := filepath.Join("snap", streamPath)
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os.MkdirAll(savePath, 0755)
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savePath = strings.ReplaceAll(savePath, "/", "_")
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os.MkdirAll(savePath, 0755)
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// 计算截图时间点
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snapTimes := p.calculateSnapTimes(publisher, startTime, endTime, granularity)
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// 检查截图时间点是否为空
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if len(snapTimes) == 0 {
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p.Warn("no valid snapshot times available",
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"streamPath", streamPath,
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"startTime", startTime.Format(time.RFC3339),
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"endTime", endTime.Format(time.RFC3339),
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"granularity", granularity)
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response := BatchSnapResponse{
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Success: false,
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Message: "No valid snapshot times available. Please check your time range and try again.",
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}
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rw.Header().Set("Content-Type", "application/json")
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json.NewEncoder(rw).Encode(response)
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return
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}
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// 立即返回成功响应，表示任务已接收
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response := BatchSnapResponse{
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Success: true,
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Message: fmt.Sprintf("Batch snap task started. Total snapshots to take: %d. Processing in background.", len(snapTimes)),
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}
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rw.Header().Set("Content-Type", "application/json")
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json.NewEncoder(rw).Encode(response)
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// 在后台异步执行截图任务
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go p.executeBatchSnapTask(publisher, streamPath, snapTimes, savePath, granularity)
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}
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// responseWithError 返回错误响应
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func responseWithError(rw http.ResponseWriter, message string) {
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rw.Header().Set("Content-Type", "application/json")
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rw.WriteHeader(http.StatusBadRequest)
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response := BatchSnapResponse{
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Success: false,
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Message: message,
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}
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json.NewEncoder(rw).Encode(response)
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}
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// calculateSnapTimes 计算截图时间点
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func (p *SnapPlugin) calculateSnapTimes(publisher *m7s.Publisher, startTime, endTime time.Time, granularity int) []time.Time {
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// 检查开始时间是否早于当前时间，如果是，则从当前时间开始
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now := time.Now()
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if startTime.Before(now) {
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p.Info("adjusting start time from past to current time",
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"originalStartTime", startTime.Format(time.RFC3339),
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"adjustedStartTime", now.Format(time.RFC3339))
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startTime = now
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}
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// 检查结束时间是否晚于开始时间
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if endTime.Before(startTime) || endTime.Equal(startTime) {
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p.Warn("invalid time range: end time is not after start time",
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"startTime", startTime.Format(time.RFC3339),
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"endTime", endTime.Format(time.RFC3339))
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return nil
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}
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var snapTimes []time.Time
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// 根据颗粒度确定截图时间点
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if granularity == 0 {
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// 按关键帧截图的逻辑
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// 获取视频轨道的IDRingList（关键帧列表）
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videoTrack := publisher.VideoTrack.AVTrack
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if videoTrack != nil {
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// 获取GOP信息
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gopDuration := time.Duration(0)
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if publisher.GOP > 0 {
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// 如果有GOP信息，估算关键帧间隔
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// 注意：这里的计算只是估算，实际应该使用帧的真实时间戳
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frameRate := float64(30) // 默认帧率，实际应该从视频流中获取
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if videoTrack.ICodecCtx != nil {
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// 获取帧率信息
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if videoTrack.FPS > 0 {
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frameRate = float64(videoTrack.FPS)
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}
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}
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gopDuration = time.Duration(float64(publisher.GOP) / frameRate * float64(time.Second))
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p.Info("estimated GOP duration", "gopFrames", publisher.GOP, "frameRate", frameRate, "duration", gopDuration)
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}
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// 遍历IDRingList获取关键帧
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videoTrack.RLock()
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if videoTrack.IDRingList.Len() > 0 {
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// 从头开始遍历所有关键帧
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for idrElem := videoTrack.IDRingList.Front(); idrElem != nil; idrElem = idrElem.Next() {
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idrRing := idrElem.Value
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if idrRing != nil {
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// 将时间戳转换为time.Time（从纳秒转为秒）
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keyframeTime := time.Unix(0, int64(idrRing.Value.Timestamp))
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// 检查是否在指定时间范围内
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if (keyframeTime.Equal(startTime) || keyframeTime.After(startTime)) &&
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(keyframeTime.Equal(endTime) || keyframeTime.Before(endTime)) {
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snapTimes = append(snapTimes, keyframeTime)
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}
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}
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}
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}
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videoTrack.RUnlock()
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// 如果没有找到关键帧，但有GOP信息，则使用估算的GOP间隔生成时间点
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if len(snapTimes) == 0 && gopDuration > 0 {
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p.Info("no keyframes found in range, using estimated GOP interval")
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for t := startTime; t.Before(endTime); t = t.Add(gopDuration) {
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snapTimes = append(snapTimes, t)
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}
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} else if len(snapTimes) == 0 {
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// 如果既没有关键帧也没有GOP信息，则默认每2秒一帧
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p.Info("no keyframes or GOP info found, using default 2s interval")
|
||
for t := startTime; t.Before(endTime); t = t.Add(2 * time.Second) {
|
||
snapTimes = append(snapTimes, t)
|
||
}
|
||
}
|
||
} else {
|
||
// 如果没有视频轨道，使用默认间隔
|
||
p.Info("no video track found, using default 2s interval")
|
||
for t := startTime; t.Before(endTime); t = t.Add(2 * time.Second) {
|
||
snapTimes = append(snapTimes, t)
|
||
}
|
||
}
|
||
} else {
|
||
// 按指定间隔截图
|
||
for t := startTime; t.Before(endTime); t = t.Add(time.Duration(granularity) * time.Second) {
|
||
snapTimes = append(snapTimes, t)
|
||
}
|
||
}
|
||
|
||
return snapTimes
|
||
}
|
||
|
||
// executeBatchSnapTask 在后台执行批量截图任务
|
||
func (p *SnapPlugin) executeBatchSnapTask(publisher *m7s.Publisher, streamPath string, snapTimes []time.Time, savePath string, granularity int) {
|
||
// 检查是否有截图时间点
|
||
if len(snapTimes) == 0 {
|
||
p.Info("batch snap task aborted: no snapshot times")
|
||
return
|
||
}
|
||
|
||
// 检查开始时间是否在未来
|
||
firstSnapTime := snapTimes[0]
|
||
now := time.Now()
|
||
if firstSnapTime.After(now) {
|
||
waitDuration := firstSnapTime.Sub(now)
|
||
p.Info("batch snap task scheduled for future",
|
||
"streamPath", streamPath,
|
||
"totalSnapshots", len(snapTimes),
|
||
"startTime", firstSnapTime.Format(time.RFC3339),
|
||
"waitDuration", waitDuration.String())
|
||
|
||
// 等待到开始时间
|
||
time.Sleep(waitDuration)
|
||
}
|
||
|
||
// 记录任务开始时间
|
||
taskStartTime := time.Now()
|
||
p.Info("batch snap task executing", "streamPath", streamPath, "totalSnapshots", len(snapTimes), "startTime", taskStartTime)
|
||
|
||
// 批量截图处理
|
||
var successCount int
|
||
var failCount int
|
||
|
||
// 执行批量截图
|
||
for i, snapTime := range snapTimes {
|
||
// 打印日志，记录当前截图时间和进度
|
||
p.Debug("taking snapshot", "progress", fmt.Sprintf("%d/%d", i+1, len(snapTimes)), "time", snapTime.Format(time.RFC3339))
|
||
|
||
// 当前实现不支持指定时间截图，所以这里只能截取当前帧
|
||
// 注意：这里每次都会重新创建一个读取器，确保获取到最新的帧
|
||
buf, err := p.snap(publisher, nil)
|
||
if err != nil {
|
||
p.Error("batch snap failed", "error", err.Error(), "time", snapTime.Format(time.RFC3339))
|
||
failCount++
|
||
continue
|
||
}
|
||
|
||
// 如果是按间隔截图，每次截图后等待指定时间
|
||
if granularity > 0 && i < len(snapTimes)-1 { // 不是最后一帧才需要等待
|
||
// 等待granularity秒，确保下一次截图与当前截图有足够的时间差
|
||
// 这里直接使用用户指定的granularity参数作为等待时间
|
||
p.Debug("waiting for next snapshot", "granularity", granularity)
|
||
time.Sleep(time.Duration(granularity) * time.Second)
|
||
}
|
||
|
||
// 保存截图
|
||
filename := fmt.Sprintf("%s_%s.jpg", streamPath, snapTime.Format("20060102150405.000"))
|
||
filename = strings.ReplaceAll(filename, "/", "_")
|
||
filePath := filepath.Join(savePath, filename)
|
||
|
||
if err := os.WriteFile(filePath, buf.Bytes(), 0644); err != nil {
|
||
p.Error("save batch snapshot failed", "error", err.Error())
|
||
failCount++
|
||
continue
|
||
}
|
||
|
||
// 保存截图记录到数据库
|
||
if p.DB != nil {
|
||
record := snap_pkg.SnapRecord{
|
||
StreamName: streamPath,
|
||
SnapMode: 3, // 批量截图模式
|
||
SnapTime: snapTime,
|
||
SnapPath: filePath,
|
||
}
|
||
if err := p.DB.Create(&record).Error; err != nil {
|
||
p.Error("save batch snapshot record failed", "error", err.Error())
|
||
}
|
||
}
|
||
|
||
successCount++
|
||
}
|
||
|
||
// 记录任务完成时间和结果
|
||
taskEndTime := time.Now()
|
||
taskDuration := taskEndTime.Sub(taskStartTime)
|
||
p.Info("batch snap task completed",
|
||
"streamPath", streamPath,
|
||
"total", len(snapTimes),
|
||
"success", successCount,
|
||
"failed", failCount,
|
||
"duration", taskDuration.String())
|
||
}
|
||
|
||
func (p *SnapPlugin) RegisterHandler() map[string]http.HandlerFunc {
|
||
return map[string]http.HandlerFunc{
|
||
"/{streamPath...}": p.doSnap,
|
||
"/query/{streamPath...}": p.querySnap,
|
||
"/batch/{streamPath...}": p.batchSnap,
|
||
}
|
||
}
|
||
|
||
|