Geoffrey worked on the FFmpeg/FFmpeg repository, where he developed and delivered a new chroma_location option within the avfilter/vf_libplacebo filter. This feature allows users to control chroma siting during color space conversion, specifically targeting subsampled-to-subsampled workflows. By enabling finer adjustment of chroma placement, Geoffrey’s work improved color accuracy and flexibility in video processing pipelines. The implementation was completed in C, leveraging his skills in filter development and video processing. Although the contribution was focused on a single feature over one month, it addressed a nuanced aspect of color management, demonstrating depth in understanding of video filter internals and color science.