video texture mapping

[andreionutz]

Hi,
I'm trying to map a video texture on a surface using texmat. it's a basic mapping that works when the texture is an image, but doesn't when it's a video. why? is this a limitation on purpose, or is it a bug? and is there a way to circumvent it?
Thanks,
Andrei

[andreionutz]

here's a tiny test code based on some example. just replace the brick texture with a video one and you'll notce the difference.


import viz

# Make background wall
WALL_SCALE = [-1, -1, -1]
texture_scale = [1, 4, 1]

wall = viz.addTexQuad()
wall.setPosition( [0, 2, 3] )
wall.zoffset(1) #avoid zfighing, make wall appear behind pictures
wall.setScale( WALL_SCALE )
wall.setEuler(0, 0, 180)

# Apply nice repeating brick texture
matrix = vizmat.Transform()
matrix.setScale( texture_scale )
wall.texmat( matrix )

bricks = viz.addTexture('tile.png')
#bricks = viz.add('smallVideo.avi', viz.TEX_RECT)

bricks.wrap(viz.WRAP_T, viz.CLAMP_TO_BORDER)
bricks.wrap(viz.WRAP_S, viz.CLAMP_TO_BORDER) #viz.MIRROR)
wall.texture(bricks)

viz.go()

[Jeff]

Do you get an error or does it look incorrect? Using an image or video included with Vizard its mapped the same:

#bricks = viz.addTexture('lake3.jpg')
bricks = viz.addVideo('mona.mpg')

[andreionutz]

it works but looks incorrectly. the problem is appears when texmat is used. the moment i set this, the video is not displayed anymore. i mean something is displayed, but not the video as expected. even applying [1, 1, 1] breaks the display.

[Jeff]

I'm not sure what the issue you're seeing is. Can you reproduce this and show the issue with two quads side by side using vizard's included resources (lake3.jpg and mona.mpg)?

[andreionutz]

Hi Jeff,
the behavior is as expected when using mona.mpg and then it worked with other videos too. But with the video that I was using when I detected the problem, the strange behavior is still there: the video plays, but it's not mapped according to the ST coordinates. I don't know what's wrong with that video(loads and plays without errors), but I can use other videos instead.
Until further issues I would consider the issue solved/closed.
Thank you,
Andrei