Code to realize partial magnification of video

receive video from the camera on the device,

if you want to see a target,

Select the area where the target is located,

then enlarge the area to see more clearly,

Gentlemen, can you give me some ideas?

requires code implementation instead of using video editing software;

Mar.05,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bd57e7-30fa3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bd57e7-30fa3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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