Worked on hardware-accelerated video encoding and decoding pipelines across the ossrs/ffmpeg-webrtc and FFmpeg/FFmpeg repositories, focusing on AV1 and VP9 codecs. Addressed strict driver limitations by refining reference list management and initialization in the AV1 encoder, improving stability for diverse hardware environments. Enhanced Vulkan-accelerated workflows by optimizing encoding pipelines, implementing DPB-aware frame ID management, and stabilizing frame threading. Fixed decoding bugs in VP9 by ensuring correct CBS data handling and improved test reliability in Vulkan-ValidationLayers by aligning test cases with specification requirements. Utilized C and C++ for low-level programming, codec implementation, driver integration, and comprehensive software validation and unit testing.