Add Downlaoder option

Specificies --downloader optionn

cmd/goutubedl/main.go

@@ -31,7 +31,7 @@ func main() {
 	}
 
 	if *dumpFlag {
-		json.NewEncoder(os.Stdout).Encode(result.Info)
+		_ = json.NewEncoder(os.Stdout).Encode(result.Info)
 		return
 	}
 

goutubedl.go

@@ -202,8 +202,9 @@ var TypeFromString = map[string]Type{
 // Options for New()
 type Options struct {
 	Type              Type
-	PlaylistStart     uint // --playlist-start
-	PlaylistEnd       uint // --playlist-end
+	PlaylistStart     uint   // --playlist-start
+	PlaylistEnd       uint   // --playlist-end
+	Downloader        string // --downloader
 	DownloadThumbnail bool
 	DownloadSubtitles bool
 	ProxyUrl          string // --proxy URL  http://host:port or socks5://host:port
@@ -264,6 +265,10 @@ func infoFromURL(ctx context.Context, rawURL string, options Options) (info Info
 		cmd.Args = append(cmd.Args, "--proxy", options.ProxyUrl)
 	}
 
+	if options.Downloader != "" {
+		cmd.Args = append(cmd.Args, "--downloader", options.Downloader)
+	}
+
 	if options.Type == TypePlaylist {
 		cmd.Args = append(cmd.Args, "--yes-playlist")
 
@@ -465,6 +470,10 @@ func (result Result) Download(ctx context.Context, filter string) (*DownloadResu
 		cmd.Args = append(cmd.Args, "--proxy", result.Options.ProxyUrl)
 	}
 
+	if result.Options.Downloader != "" {
+		cmd.Args = append(cmd.Args, "--downloader", result.Options.Downloader)
+	}
+
 	cmd.Dir = tempPath
 	var w io.WriteCloser
 	dr.reader, w = io.Pipe()
@@ -483,7 +492,7 @@ func (result Result) Download(ctx context.Context, filter string) (*DownloadResu
 	}
 
 	go func() {
-		cmd.Wait()
+		_ = cmd.Wait()
 		w.Close()
 		os.RemoveAll(tempPath)
 		close(dr.waitCh)

goutubedl_test.go

@@ -187,7 +187,7 @@ func TestPlaylist(t *testing.T) {
 	}
 }
 
-func TestTestUnsupportedURL(t *testing.T) {
+func TestUnsupportedURL(t *testing.T) {
 	defer leaktest.Check(t)()
 
 	_, ydlResultErr := goutubedl.New(context.Background(), "https://www.google.com", goutubedl.Options{})
@@ -273,6 +273,31 @@ func TestErrorNotASingleEntry(t *testing.T) {
 		DownloadThumbnail: false,
 	})
 	if ydlResultErr != goutubedl.ErrNotASingleEntry {
-		t.Errorf("expected is single entry error, got %s", ydlResultErr)
+		t.Fatalf("expected is single entry error, got %s", ydlResultErr)
 	}
 }
+
+func TestOptionDownloader(t *testing.T) {
+	defer leakChecks(t)()
+
+	ydlResult, ydlResultErr := goutubedl.New(
+		context.Background(),
+		testVideoRawURL,
+		goutubedl.Options{
+			Downloader: "ffmpeg",
+		})
+
+	if ydlResultErr != nil {
+		t.Fatalf("failed to download: %s", ydlResultErr)
+	}
+	dr, err := ydlResult.Download(context.Background(), ydlResult.Info.Formats[0].FormatID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	downloadBuf := &bytes.Buffer{}
+	_, err = io.Copy(downloadBuf, dr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	dr.Close()
+}