Not able to view Thumbnail rendition(638x638) for few dam video assets

Hi All,

We are creating the thumbnail rendition(638x638) for video asset using asset.addrendition(name, inputstream, mimetype) dam API.

External image will be read and add it as rendition for video asset. For few video assets, we can able to view this thumbnail by double clicking the rendition and open it in different tab.

For few video assets, we can't able to view it by double clicking that rendition. No error is appeared in the logs

Please provide your inputs to find the solution for this issue.

Thanks in advance !!