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Blender 2D stabilisation node issue when autoscale is selected
Closed, ResolvedPublic

Description

System Information
Linux Ubuntu 17.04 on a Aspire V3 - 772G with a NVIDIA GeForce GTX 760M

Blender Version
Broken: 2.78c and 2.79 release candidate
Worked: not working in any case

Short description of error
2D stabilisation not working with autoscale - frames are randomly rendered some correctly stabilised, others in the original video position/rotation/scale, what leads to an output video flickery, jumpy.

Exact steps for others to reproduce the error
First step: Movie Clip Editor. Two makers are successfully tracked till the end of a loaded footage. Display Stabilization checked; 2D Stabilization checked; both tracks are added as Tracks for Location and Tracks for Rotation. Auto Scale is checked and some values are given to location and rotation influences.
Compositing: simplest 2D stabilisation scheme: MovieClipNode.image --> Stabilize2D.imageInput; Stabilize2D.imageOutput --> (Composite AND Viewer).
Finally: output file(s) selected to render (tried with AVI, MP4 and PNG sequence, apparently no matter the output format). Render animation. Output flickering randomly between stabilised and not stabilised frames.

This error was also reported by other users: https://blender.stackexchange.com/questions/62502/stabilize-2d-node-creates-jumpy-renders, https://blenderartists.org/forum/showthread.php?419514-2D-stabilization-is-jumpy-on-render