diff --git a/backend/modules/tasks/discover/discover_medias.go b/backend/modules/tasks/discover/discover_medias.go
index c29dd4d..5e1a3f0 100644
--- a/backend/modules/tasks/discover/discover_medias.go
+++ b/backend/modules/tasks/discover/discover_medias.go
@@ -110,6 +110,12 @@ func (d *DiscoverMedias) processVideo(video string, to string) (media_store.Vide
 		return info, errors.Wrapf(err, "ffmpeg audio to m3u8: %s", audioFile)
 	}
 
+	// extract poster
+	posterFile := filepath.Join(to, "poster.jpg")
+	if err := d.ffmpegVideoToPoster(video, posterFile); err != nil {
+		return info, errors.Wrapf(err, "ffmpeg video to poster: %s", video)
+	}
+
 	// get media duration
 	duration, err := d.getMediaDuration(video)
 	if err != nil {
@@ -261,11 +267,11 @@ func (d *DiscoverMedias) runCleanup(to string) {
 }
 
 // getSnapshot get the snapshot of target seconds of a video
-func (d *DiscoverMedias) ffmpegVideoToPoster(video string, output string, seconds int) error {
+func (d *DiscoverMedias) ffmpegVideoToPoster(video string, output string) error {
 	// ffmpeg -i input_video.mp4 -ss N -vframes 1 -vf "scale=width:height" output_image.jpg
 	args := []string{
 		"-i", video,
-		"-ss", fmt.Sprintf("00:%02d:00", seconds),
+		"-ss", "00:01:00",
 		"-vframes", "1",
 		"-vf", "scale=640:360",
 		output,