Fix exec handler run pipe instead of rtsp

internal/exec/exec.go

@@ -49,34 +49,34 @@ func Init() {
 
 func execHandle(rawURL string) (core.Producer, error) {
 	var path string
+	var query url.Values
 
-	rawURL, rawQuery, _ := strings.Cut(rawURL, "#")
-
-	args := shell.QuoteSplit(rawURL[5:]) // remove `exec:`
-	for i, arg := range args {
-		if arg == "{output}" {
-			if rtsp.Port == "" {
-				return nil, errors.New("rtsp module disabled")
-			}
-
-			sum := md5.Sum([]byte(rawURL))
-			path = "/" + hex.EncodeToString(sum[:])
-			args[i] = "rtsp://127.0.0.1:" + rtsp.Port + path
-			break
+	// RTSP flow should have `{output}` inside URL
+	// pipe flow may have `#{params}` inside URL
+	if i := strings.Index(rawURL, "{output}"); i > 0 {
+		if rtsp.Port == "" {
+			return nil, errors.New("exec: rtsp module disabled")
 		}
+
+		sum := md5.Sum([]byte(rawURL))
+		path = "/" + hex.EncodeToString(sum[:])
+		rawURL = rawURL[:i] + "rtsp://127.0.0.1:" + rtsp.Port + path + rawURL[i+8:]
+	} else if i = strings.IndexByte(rawURL, '#'); i > 0 {
+		query = streams.ParseQuery(rawURL[i+1:])
+		rawURL = rawURL[:i]
 	}
 
+	args := shell.QuoteSplit(rawURL[5:]) // remove `exec:`
 	cmd := exec.Command(args[0], args[1:]...)
 	if log.Debug().Enabled() {
 		cmd.Stderr = os.Stderr
 	}
 
 	if path == "" {
-		query := streams.ParseQuery(rawQuery)
 		return handlePipe(rawURL, cmd, query)
 	}
 
-	return handleRTSP(rawURL, path, cmd)
+	return handleRTSP(rawURL, cmd, path)
 }
 
 func handlePipe(_ string, cmd *exec.Cmd, query url.Values) (core.Producer, error) {
@@ -101,7 +101,7 @@ func handlePipe(_ string, cmd *exec.Cmd, query url.Values) (core.Producer, error
 	return prod, err
 }
 
-func handleRTSP(url, path string, cmd *exec.Cmd) (core.Producer, error) {
+func handleRTSP(url string, cmd *exec.Cmd, path string) (core.Producer, error) {
 	if log.Trace().Enabled() {
 		cmd.Stdout = os.Stdout
 	}