[FFmpeg-user] question about displace filter
Paul B Mahol
onemda at gmail.com
Sat Nov 18 20:37:41 EET 2017
On 11/18/17, Michael Koch <astroelectronic at t-online.de> wrote:
> In the documentation for the displace filter is written:
> "The second input specifies how much to displace pixels along the
> x-axis, ..."
> If I understand this right, a video input file is "misused" for storing
> the displacement (instead of brightness). Does that mean that only
> positive displacements are possible?
No, value stored in pixels is 0 - 255.
One just substract each possible value with 128 and now you have [-128, 127].
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