Sometimes it is required to have images as previews for ringtones or videos. (For example we can consider thumbnail as video preview and so on). Now Enterflex supports prepared previews for images or ringtones. Prepared previews are previews, prepared by user and stored to Enterflex Storage. See more about prepared here.
Use utility preview to get image previews for ringtones or images. Parameters ringtone-preview-type and video-preview-type are used to specify type of preview for ringtones and previews
Possible values for ringtone-preview-type: jpeg, gif, mp3, flash
Possible values for video-preview-type: jpeg, gif, video
For now only images with extensions jpg, jpeg, gif are accepted.
Please note that those image extensions need to be listed in content-formats property of storage that you store previews in
For example:
<ringtone_content_storage>.content-formats=mmf,mid,imy,emy,mot,srt,sag,sagem,au,aiff,ott,rtttl,rtx,nokia,wav,amr,mp3,txt,qcp,wma,mld,rmf,xmf,pmd,awb,jpg,jpeg,gif
Please also note that preview file should be marked as preview in meta information field: preview=true (in <filename>.properties file)
Image preview for ringtones and videos can also be resized using these parameters: preview-width, preview-height, scale, which are described 
here. Please not than only these three parameters are acceptable.
Examples:
http://localhost:8080/gateway/?utilityname=preview&domain=video&video-preview-type=jpeg&content=12619&preview-width=300&preview-height=300&storage=videos
http://localhost:8080/gateway/?utilityname=preview&domain=ringtone&ringtone-preview-type=gif&content=tul&preview-width=300&preview-height=300&storage=ringtones