On 19-06-2020 03:24 am, exwm wrote:
Currently, the zoompan filter exposes a time variable for use in
the zoom, x, and y expressions. This variable is perhaps better named
out_time as it represents the timestamp in seconds of each output frame
produced by zoompan. This patch does not rename the time variable
to out_time as this may be a breaking change.

This patch adds instead
an in_time variable that provides access to the timestamp in seconds
of each input frame to the zoompan filter. This helps to design zoompan
filters that depend on the input video timestamps. For example, it makes
it easy to zoom in instantly for only some portion of a video.
Both the time and in_time variables have been added in the documentation
for zoompan.

Add a short string version 'it'  as well.

Gyan
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