Auto Align video media texure glitches in RC 1.19.1 (4)

I've been tracking down a glitch with the Auto Align feature that automatically aligns your media texture for use with videos. In the current Release Candidate (1.19.1 (4)) this feature does not work with all resolutions of video, and when it does work it sometimes leaves a very thin black border around the media texture.

Basically I've found that videos with resolutions that include powers of two and/or odd numbers will not align properly. Not a show-stopper but it is annoying, especially for certain uses of video.

I initially found the glitch when a morphing sculpture I created stopped working. It uses the video stream to control the shape of a sculpted prim and is not working in the RC viewer. I initially thought that this was because of a problem specific to video-as-sculptmap, but it turns out it was because of the resolution of the video I was using: 32x32 pixels. The thin black border that is present on some resolutions is also a problem here as it causes the sculpty shape to be distorted.

It'd be great if those of you that are interested in this sort of thing could help me test my findings and try to replicate the problem on your system. I've submitted a bug report on JIRA that can be found here: https://jira.secondlife.com/browse/VWR-5950

Hmmm, interesting, I knew sculpties refreshed at around 12.5fps like a movie from my investigations when we found that movie media added to the client pipelines for UpdateImage. We re-rendered our movies to interlace with the sculpties therefore reducing the addative loads on the client.

Have you got Autoscale selected on the land media? That can add black lines on the media, when you also use Auto_Align as well. The black lines can also appear when the shape of the pixel used in rendering a movie, does not match the overall resolution output, that results in non Vesa compliant formats. Choosing a format size does not overall control the output size, unless you first choose a pixel size. I try and stick with rounded pixels as they scale better.