Imported video mp4 not render A video in MP4 imported in Blender  doesn't  work. I can  see the video in the preview, but when I render it, it is transformed in a single image.
UPDATE
I create new project, select camera and then drag&amp;drop .MP4 video on scene.
I create new 3d object that rotate in front of MP4 video layer.
3d object render correctly but video not play.
Only in preview mode, video play correctly.
I'm guessing your output information is set to an image output.  You need to change it to a video output in the properties panel (see image below).  Then hit Render &gt; Render Animation.

You also may need to change some audio settings, which I would need to research to remember how.