Worked on enhancing video processing reliability in the opencv/opencv repository by addressing a bug in the VideoWriter component when using the FFmpeg backend. Focused on ensuring correct handling of grayscale input by implementing a conversion process for multi-channel frames when isColor is set to false. Improved error transparency by propagating the writeFrame return value and introducing warnings on failure, which helps users identify issues during video generation. Added a regression test to validate the grayscale conversion workflow. Utilized C++, FFmpeg, and OpenCV to strengthen integration with grayscale video pipelines, supporting use cases in surveillance, broadcasting, and media processing.