Tips: Key references

1. How to calculate wind speed and wind direction from u and v components of the wind?
2. Meridional circulation index (MCI)
3. 夸克免费扩容方案
4. 合并视频与字幕

1	ffmpeg -i 1.mkv -i 1.srt -map 0 -map 1 -c copy 2.mkv

5. 转换为MKV文件

1	ffmpeg -i 1.ts -c copy 2.mkv