fix: lint errors

Author: sundowndev

ffmpeg/ffmpeg.go

@@ -132,7 +132,7 @@ func (t *Transcoder) Output(arg string) transcoder.Transcoder {
 
 // InputPipe ...
 func (t *Transcoder) InputPipe(w *io.WriteCloser, r *io.ReadCloser) transcoder.Transcoder {
-	if &t.input == nil {
+	if t.input == "" {
 		t.inputPipeWriter = w
 		t.inputPipeReader = r
 	}
@@ -141,7 +141,7 @@ func (t *Transcoder) InputPipe(w *io.WriteCloser, r *io.ReadCloser) transcoder.T
 
 // OutputPipe ...
 func (t *Transcoder) OutputPipe(w *io.WriteCloser, r *io.ReadCloser) transcoder.Transcoder {
-	if &t.output == nil {
+	if t.output == nil {
 		t.outputPipeWriter = w
 		t.outputPipeReader = r
 	}
@@ -216,7 +216,7 @@ func (t *Transcoder) GetMetadata() (transcoder.Metadata, error) {
 
 		var metadata Metadata
 
-		if err = json.Unmarshal([]byte(outb.String()), &metadata); err != nil {
+		if err = json.Unmarshal(outb.Bytes(), &metadata); err != nil {
 			return nil, err
 		}