前三个点位所有功能已调通

pkg/video/paly.go

@@ -1 +1,47 @@
 package video
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"log"
+	"os/exec"
+	"sync"
+)
+
+func Play(ctx context.Context, file string) error {
+	if file == "" {
+		log.Println("video file is empty")
+		return nil
+	}
+	cmd := exec.CommandContext(ctx, "ffplay", "-autoexit", "-fs", file)
+	pipe, err := cmd.StderrPipe()
+	if err != nil {
+		return err
+	}
+
+	var wait sync.WaitGroup
+	defer wait.Wait()
+
+	a := make(chan struct{})
+	defer close(a)
+	go func() {
+		wait.Add(1)
+		defer wait.Done()
+		for {
+			select {
+			case <-a:
+			default:
+				line, _, err := bufio.NewReader(pipe).ReadLine()
+				if err != nil {
+					if err == io.EOF {
+						return
+					}
+					break
+				}
+				log.Println(string(line))
+			}
+		}
+	}()
+	return cmd.Run()
+}