Merge pull request #65 from banana-framework-lab/banana-patch-1

U In version 1.19, ffmpeg in the current directory cannot be used aut…

node.go

@@ -14,6 +14,7 @@ type Stream struct {
 	Label      Label
 	Selector   Selector
 	Type       string
+	FfmpegPath string
 	Context    context.Context
 }
 
@@ -31,6 +32,7 @@ func NewStream(node *Node, streamType string, label Label, selector Selector) *S
 		Label:      label,
 		Selector:   selector,
 		Type:       streamType,
+		FfmpegPath: "ffmpeg",
 		Context:    context.Background(),
 	}
 }

run.go

@@ -248,10 +248,15 @@ func SeparateProcessGroup() CompilationOption {
 	}
 }
 
+func (s *Stream) SetFfmpegPath(path string) *Stream {
+	s.FfmpegPath = path
+	return s
+}
+
 // for test
 func (s *Stream) Compile(options ...CompilationOption) *exec.Cmd {
 	args := s.GetArgs()
-	cmd := exec.CommandContext(s.Context, "ffmpeg", args...)
+	cmd := exec.CommandContext(s.Context, s.FfmpegPath, args...)
 	if a, ok := s.Context.Value("Stdin").(io.Reader); ok {
 		cmd.Stdin = a
 	}