Pengbin worked on the ossrs/ffmpeg-webrtc repository, focusing on stability improvements for H.264 video decoding on ARM64 platforms. He addressed test failures by correcting NEON assembly logic in the plane prediction path, ensuring that the ARM64 implementation matched the C reference for prediction accuracy. Using assembly programming and low-level optimization techniques, Pengbin improved the reliability of video codec operations on aarch64 devices. His work reduced platform-specific test flakiness and enhanced cross-platform consistency, enabling more robust ARM deployments. The depth of his contributions is reflected in the careful alignment of assembly routines with reference behavior, strengthening the project’s overall correctness.