Aliasing and Moire issues are heavily discussed topics for DSLR HD video, however the performance evaluations remain very subjective and are typically based on random Youtube or Vimeo videos. Adding to this, camera manufactures hardly disclose any details about the related actual sensor level pixel processing.
This is an alternative method to determine /characterize the aliasing and Moire performance of a DSLR video. Basically, the method is a scanning for critical line densities which produce interferences/resonances in the image. Knowing this will give hints on what is going on at the low level sampling process, reveling the effective vertical and horizontal resolutions. This will also provide information on the requirements for an optical antialising filter, ie. the blur diameter needed, to eliminate the aliasing artifacts.
The test is demonstrated in the videos:
The test is basically 2 fine line patterns (stacks of 600 lines), one vertical and one horizontal. To carry out the test, simply record a video of the test patterns while zooming in and out. In this way, the sensor is scanned for line densities with critical interferences/resonance. A subsequent analysis of the video will readily provide precise respective line density values. (Bear in mind that this line pattern is designed to be a worst case scenario for provoking Moire patterns)