The image type is not in the info structure in the sample,
not in the caps.
https://bugzilla.gnome.org/show_bug.cgi?id=691687
* @GST_TAG_IMAGE_TYPE_BAND_ARTIST_LOGO : Band/artist logotype
* @GST_TAG_IMAGE_TYPE_PUBLISHER_STUDIO_LOGO : Publisher/studio logotype
*
- * Type of image contained in an image tag (specified as field in
- * the image buffer's caps structure)
+ * Type of image contained in an image tag (specified as "image-type" field in
+ * the info structure in the image's #GstSample)
*/
/* Note: keep in sync with register_tag_image_type_enum() */
typedef enum {