Fit image in control

[mikhal]

Could be a rounding error. Try another formula:

Result.Width := Round(AMediaWidth * AControlHeight / AMediaHeight);
and
Result.Height := Round(AMediaHeight * AControlWidth / AMediaWidth);
Your Version defines a small result in your term to round, leading to a possible inaccuracy with your following multipication.

Second: Round uses Banker's Rounding. If your term to round is in the middle of two numbers it will give you the even number.

Gretings
Mikhal