Some sharpness will be lost after ffmpeg encoding

[kevinMintnick]

Some sharpness of existing video files will be lost after ffmpeg encoding, but the file is much larger than the source file. How can I modify it to maintain the file size and clarity?

[wlanjie]

Reduce bit rate

[kevinMintnick]

however, after the source file is recoded, the clarity will be affected regardless of the bit rate.

[wlanjie]

This is certain

[kevinMintnick]

This project has a lot of learning space. Thank you very much