Following up my earlier post on this, I’ve now made a complete move towards square art with a footer containing the name of the TV show. I don’t know why I didn’t do this earlier. It looks so much neater than just a screen shot, because it’s always a uniform size and the footer helps with identification.
With screen shots, you’re dealing with either 4:3 or 16:9 aspect ratios (Star Wars: The Clone Wars is a rare exception–it’s presented in 2.35:1). I settled on an 800 x 800 pixel size. This allows me to scale up or down a moderate amount so as not to introduce too many artifacts. I use a footer of 300 pixels high for 16:9 content (576p scales down a little) and 200 pixels high for 4:3 (576p scales up).
I usually use a solid colour for the footer and this is sampled from the artwork that I use for the whole season. Here’s an example:
Using a sampled colour connects the season and the episode art visually. When the season art changes, so does the footer:
It’s more work, of course, but once I’ve set up the image as a Photoshop file with the footer and the TV show title, I can then bring in my screen shots as separate layers and save out as JPEG files. That keeps all the working files together in one file, with separate output files.