Hi, from rewriting your dataset,
image_name:  angry_actor_104.jpg
face_id_in_image: 0
face_box_top: 28
face_box_left: 113
face_box_right: 226
face_box_bottom: 141
face_box_cofidence: 22.9362
expression_label: 0
YOLOv5 handles the dataset both image and the corresponding annotation have the same file name.
The annotation only includes the followings,
label, box_center_x, box_center_y, width, height
and all coordinates are [0, 1).
Consequently, your annotation should be
filename: angry_actor_104.txt
Inside the file,
expression_label bbox_center_x bbox_center_y bbox_width bbox_height
if there are multiple bbox inside an image, your annotation text file should be
expression_label1 bbox_center_x1 bbox_center_y1 bbox_width1 bbox_height1
expression_label2 bbox_center_x2 bbox_center_y2 bbox_width2 bbox_height2
…