Over a two-month period, this developer focused on stability and correctness within the FFmpeg/FFmpeg and ossrs/ffmpeg-webrtc repositories. They addressed a compile-time memory management issue in graphprint.c, ensuring successful builds across configurations by explicitly including the necessary header when HAVE_AV_CONFIG_H is defined. In the ossrs/ffmpeg-webrtc project, they resolved a boundary-check bug in the planar GBRP conversion path, preventing uninitialized output pixels and improving frame consistency for live WebRTC processing. Their work demonstrated proficiency in C and assembly programming, build systems, and image processing, with careful attention to cross-architecture compatibility and clear, maintainable code changes.