sizingPolicy property

Specify one of the following values to control scaling of thumbnails:

Fit: Elastic Transcoder scales thumbnails so they match the value that you specified in thumbnail MaxWidth or MaxHeight settings without exceeding the other value.
Fill: Elastic Transcoder scales thumbnails so they match the value that you specified in thumbnail MaxWidth or MaxHeight settings and matches or exceeds the other value. Elastic Transcoder centers the image in thumbnails and then crops in the dimension (if any) that exceeds the maximum value.
Stretch: Elastic Transcoder stretches thumbnails to match the values that you specified for thumbnail MaxWidth and MaxHeight settings. If the relative proportions of the input video and thumbnails are different, the thumbnails will be distorted.
Keep: Elastic Transcoder does not scale thumbnails. If either dimension of the input video exceeds the values that you specified for thumbnail MaxWidth and MaxHeight settings, Elastic Transcoder crops the thumbnails.
ShrinkToFit: Elastic Transcoder scales thumbnails down so that their dimensions match the values that you specified for at least one of thumbnail MaxWidth and MaxHeight without exceeding either value. If you specify this option, Elastic Transcoder does not scale thumbnails up.
ShrinkToFill: Elastic Transcoder scales thumbnails down so that their dimensions match the values that you specified for at least one of MaxWidth and MaxHeight without dropping below either value. If you specify this option, Elastic Transcoder does not scale thumbnails up.

Implementation