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A thumbnail is an image representation of the audio or video file that appears in the media player before being played. It also appears in search results and when browsing a collection on JSTOR.
By default, when you upload a new video file to JSTOR Digital Stewardship Services, a thumbnail image is automatically generated using a frame 30% through the video's runtime. Audio files don't have thumbnails automatically generated for them, and a generic placeholder thumbnail will be displayed when published to JSTOR.
Uploading or replacing thumbnail images
You can upload or replace a thumbnail for an audio or video file by editing the item. Supported thumbnail file formats are JPEG and PNG and recommended dimensions are 300px x 150px.
To upload or replace a thumbnail for an audio or video item:
- In your project, double-click an item to edit it or select an item and select Edit.
- Open the Edit thumbnail menu after the media preview and select Replace thumbnail.
- Click the Choose image button, and select a thumbnail image file.
- Supported file types are JPEG (.jpg, .jpeg) and PNG (.png)
- Recommended thumbnail size is 300px wide x 150px high
- Click the Upload button.
- Click the Save button before the media preview to save your changes.
- Republish the item to see the changes reflected on JSTOR.
You can reset an item's thumbnail to the default (a placeholder image for audio items or a frame 30% into a video for video items) by choosing Reset thumbnail from the Edit thumbnail menu.