Masking a Moving Object

[Alun]

I've imported a short (2 second) video into PS as layers together with a still of the same scene. I want to create a mask for a flower which is moving. Do I need to mask each individual frame or is there an easier way of achieving this? I can't just create a big mask round the flower and it surrounding area as the colours won't match in both versions.

Thanks in advance

 

[admin]

If you create a mask on the layer that you are moving, you should be able to move the mask along with the layer.