[vlc-devel] Meaning of video zoom
remi at remlab.net
Thu May 24 21:04:57 CEST 2018
If the SAR and PAR are equal, the meaning of zoom is clear: it is the ratio
from input samples to output pixels.
But if they are not equal, according to what metric should the zoom be rated?
I can think of 5 different dimensions to measure it, and they are probably
- horizontal or
(Not to mention reorientation.)
I guess broadcasting industry reasons in vertical dimension, and display
industry in diagonales.
N.B.: VLC has never measured the PAR to this point. Unless explicitly
configured (--monitor-par), it is assumed 1:1.
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