[FFmpeg-user] Questions about using CROP filter to pan a jpeg image

[Michael Koch]

Am 27.09.2024 um 13:37 schrieb Bram van Oosterhout:
> The expression for x (third parameter in crop: 960*t ) contains
> a variable t.
> [Q2] What is t. I am unable to find it in the documentation.

It's described in the documentation:
https://www.ffmpeg.org/ffmpeg-all.html#crop
t is the timestamp expressed in seconds.

> [Q3] Is t related to the framerate?

no.

> [Q4] There are other magic numbers(?) in various web posts (like: n).
> Where are they documented?

at the same place as above.

Michael