Worked on the FFmpeg/FFmpeg repository to enhance the stability of multimedia playback by addressing a critical bug in the MOV demuxer. Focused on improving timestamp handling for HEVC files, the solution involved updating the next_ts field from an int to an int64_t, ensuring correct processing of very large timestamps and preventing integer overflow issues that could cause seeking errors. Utilized C programming skills and deep knowledge of demuxing and error handling within multimedia frameworks to implement this fix. The work resulted in more reliable media playback for files with high timestamp values, directly reducing user-facing errors in complex scenarios.