previews.md

title
Previews

A preview is a dictionary containing metadata for optional thumbnail images or videos that can be used in the ClearML Enterprise WebApp (UI) to view selected content in a Dataset. previews includes the uri of the thumbnail image or video.

Previews are not mandatory. Their primary use is to view images with formats that cannot be displayed in a web browser (such as TIFF and 3D formats).

Example

The following is an example of preview metadata.

"preview": {
        "content_type": "image/jpg",
        "uri": "https://s3.amazonaws.com/my_previews/car_1/front_preview.jpg",
        "timestamp": 0
    }

{
    "timestamp": 1234567889,
    "context_id": "car_1",
    "meta": {
        "velocity": "60"
    },
    "sources": [
        {
            "id": "front",
            "content_type": "video/mp4",
            "width": 800,
            "height": 600,
            "uri": "https://s3.amazonaws.com/my_cars/car_1/front.mp4",
            "timestamp": 1234567889,
            "meta" :{
                "angle":45,
                "fov":129
            },
            "preview": {
                "content_type": "image/jpg",
                "uri": "https://s3.amazonaws.com/my_previews/car_1/front_preview.jpg",
                "timestamp": 0
            },
            "masks": [
                {
                    "id": "seg",
                    "content_type": "video/mp4",
                    "uri": "https://s3.amazonaws.com/seg_masks/car_1/front_seg.mp4",
                    "timestamp": 1234567889
                },
                {
                    "id": "instances_seg",
                    "content_type": "video/mp4",
                    "uri": "https://s3.amazonaws.com/seg_masks/car_1/front_instance_seg.mp4",
                    "timestamp": 1234567889
                }
            ]
        },
        {
            "id": "rear",
            "uri": "https://s3.amazonaws.com/my_cars/car_1/rear.mp4",
            "content_type": "video/mp4",
            "timestamp": 1234567889
        }
    ],
    "rois": [
        {
            "sources": ["front"],
            "label": ["bike"],
            "poly":[30, 50, 50,50, 100,50, 100,100],
            "meta": {
               "velocity": 5.4
            }
        },
        {
            "sources": ["front", "rear"],
            "label": ["car"],
            "poly":[30, 50, 50,50, 100,50, 100,100]
        }
    ]
}

Here's an example of Previews in the ClearML Enterprise WebApp (UI). Each thumbnail is a Preview:

If the preview's uri is for a video, the thumbnail will display the video with video controls: