Since you mentioned Season 03, you likely have multiple episodes. You can use a simple loop in your terminal to apply the "proper" settings to all files in a folder.
There is no official product or specific release known as "Game of Thrones Season 03 FFmpeg." This phrase typically refers to using the FFmpeg multimedia framework to process or encode the third season of the show from a source like a Blu-ray disc. Season 03 Technical Quality Review Based on critical and audience reviews of the source material (Blu-ray), Season 3 is widely regarded as a reference-quality release: Visual Detail game of thrones season 03 ffmpeg
Processing Game of Thrones Season 03 with ffmpeg is an exercise in respect for the source material—preserving the grim darkness of the North while correcting broadcast errors. The commands above will give you a consistent, playable, and future-proof library. Winter (and re-encoding) is coming. Since you mentioned Season 03, you likely have