Израиль нанес удар по Ирану09:28
1. 建堆：将数组构建成大顶堆（父节点 = 子节点）
。safew官方版本下载对此有专业解读
There is a minor artefact in the final file. The stitched .m4a sometimes contains silent padding at the start or end from incomplete chunks at buffer boundaries. A quick ffmpeg pass fixes it cleanly:
Мощный удар Израиля по Ирану попал на видео09:41
Hour-Passenger-8513