server ffmpeg version needed extra args

media/video.go

@@ -33,7 +33,7 @@ func VideoSize(filename string) (image.Rectangle, error) {
 func VideoEncode(filename string, size image.Rectangle, thumbDir string) error {
 	dest := thumbFilename(thumbDir, size, path.Base(filename))
 	os.MkdirAll(filepath.Dir(dest), 0755)
-	cmd := exec.Command("ffmpeg", "-i", filename, "-vf", fmt.Sprintf("scale=%d:%d", size.Dx(), size.Dy()), dest)
+	cmd := exec.Command("ffmpeg", "-i", filename, "-vf", fmt.Sprintf("scale=%d:%d", size.Dx(), size.Dy()), "-strict", "-2", dest)
 	if out, err := cmd.CombinedOutput(); err != nil {
 		os.Remove(dest)
 		return fmt.Errorf("could not thumb video: %s", string(out))