How to get original height and width of video strip in python? Here is the context :
I call blender by the command line like so :
blender -b -P myscript.py

In the python script i am doing something simple, i add a movie strip with no sound and then print orignal size of the video: 

bpy.ops.sequencer.movie_strip_add({'area': area},filepath='/tmp/file.mp4',frame_start=1, channel=1)

active_strip = bpy.context.scene.sequence_editor.active_strip

print(active_strip.elements[0].orig_height)

print(active_strip.elements[0].orig_width)


The problem is that i always get 0 for both height and width which is not the original dimension of the video.

When i execute this inside blender python console i get the right original dimensions.

Any ideas why it does'nt work by the command line?

Thanks
I've found that you have to show strip in the VSE viewport to get dimesions to work. Since there's no viewports in background mode, Blender can't update information about a strip you added. So you're getting zeros.