During December 2024, Dennis enhanced video encoding workflows by developing two features across the ossrs/ffmpeg-webrtc and obsproject/obs-studio repositories. He added VideoToolbox spatial adaptive quantization (spatial_aq) support to FFmpeg, enabling macOS 15 compatibility and improved encoding efficiency through C-based multimedia framework development. In OBS Studio, Dennis refactored the MP4 output plugin to use a packet time callback, ensuring chapter markers align precisely with video frames and improving the reliability of chaptered recordings. His work demonstrated depth in video encoding and plugin development, focusing on aligning encoding semantics with actual frame data for higher quality playback and user experience.