video_thumb_multipage.js

{
    "application_id": "YOUR_APP_ID",
    "src":"https://s3.amazonaws.com/blitdoc/movies/big_buck_bunny.mp4",
    "src_type" : "multi_page",
    "src_data" : { "pages" : [0, 60, 300]},
    "functions":[
        {
            "name":"resize_to_fit",
            "params":{
                "width":300
            },
            "save":{
                "image_identifier":"MY_CLIENT_ID"
            }
        }
    ]
}