I do not know your project settings. However I hope this helps (you can consult your CGI team as to the frame size etc that they have used to create your image stills/sequence).
You have to open a new project with the settings you would be outputting to. Eg. Format HD YCC 422 – 1080psf or 1080i and then chose your frame rate.
To import your images. Trace the path of your files in Win Explorer & paste it on the DS address space. hen right click and go to capture settings. Here you can vary the compression if u want. In your Media Capture window – click on “Keep Alpha” & Premultiplied Alpha. Input Levels should be “Graphics” since this is a CGI image and not Video.
Thanks