fix #348 improve security by only allow load class in ffmpeg module

[lucemia]

fix #348

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.45%. Comparing base (c7d2f27) to head (21c759e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #376      +/-   ##
==========================================
+ Coverage   97.84%   98.45%   +0.61%     
==========================================
  Files          45       45              
  Lines        1764     1751      -13     
==========================================
- Hits         1726     1724       -2     
+ Misses         38       27      -11     

Flag	Coverage Δ
3.10	98.45% <100.00%> (+0.61%)	⬆️
3.11	98.45% <100.00%> (+0.61%)	⬆️
3.12	98.45% <100.00%> (+0.61%)	⬆️

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