During December 2024, Lingyi Kong focused on stabilizing H.264 decoding for multi-slice field video in the ossrs/ffmpeg-webrtc repository. He addressed a bug in the deblocking filter’s stride calculation within the C-based avcodec/h264 module, ensuring correct field-based decoding for multi-slice content. To validate the fix and prevent future regressions, he added a dedicated regression test and sample file, expanding test coverage for the deblocking path. This targeted engineering improved decoding correctness and reduced the risk of artifacts in production video workloads, demonstrating depth in H.264 video decoding, bug fixing, and robust testing practices within a complex codebase.