videoscale : Quality issue with few alogorithms(methods) 3,6,8,9

Submitted by Baby octopus

Description

Created attachment 342475
Input output files

Hi,

I'm seeing some quality issue with videoscale while downscaling from 1080p and 360p. Thick visible lines are seen at certain places. Also, periodic prints "can't find exact taps" are seen whenever such lines are seen in output

Pipeline : gst-top-1.0 gst-launch-1.0 filesrc location=input.jpg ! decodebin ! videoscale method=9 ! video/x-raw,width=640,height=360 ! videoconvert ! pngenc ! filesink location=/root/out.png

The issue is seen for method=3,6,8 and 9

Attached zip containing input/output files

Attachment 342475, "Input output files":
videoscale_issue.rar

Version: 1.10.0