This section defines the behavior of the thumbnails generation. Thumbnails are just preview images supported by the DASH IF IOP v4.3 spec. You can see them when scrolling video forward or backwards, just as you see it on YouTube, for example

Thumbnail Generation

Table of Contents

This section defines the behavior of the thumbnails generation. Thumbnails are just preview images supported by the DASH spec (check DASH IF IOP v4.3 spec and, in particular, the paragraph 6.2.6 Tiles of thumbnail images). You can see them when scrolling video forward or backwards, just as you see it on YouTube, for example. These settings are used in the Image Extraction Phase.

{
    "Thumbnails": {
        "Generate": true,
        "Width": 64,
        "Height": 64,
        "DurationInSeconds": 5,
        "BandwidthInKbps": 128
    }
}
Property Description Additional Info Required?

Generate

Use generation or not. Supported values: true, false.

-

Yes.

Width

Desired thumbnail image width in pixels.

You can omit this value if Height is set. Then Encoding automatically calculates the proportional width.

Yes, if Height is not defined.

Height

Desired thumbnail image height in pixels.

You can omit this value if Width is set. Then Encoding automatically calculates the proportional height.

Yes, if Width is not defined.

DurationInSeconds

Time between the indivudal thumbnails

For example, you have 60 seconds for video and 5 seconds for thumbnail duration. There will be 12 thumbnails in total.

Yes.

BandwidthInKbps

Bandwidth for tiles

Manual value, must be greater than 0.

Yes.

Revision History

The table below lists the document versions and any changes to them.

Version Date Description

1.0

October 20, 2020

  • Initial version.

1.1

April 23, 2021

  • BandiwdthInKbps property added.