ENVI supports the following video format files: http://www.exelisvis.com/docs/support... IDL also supports video through mpeg libraries. The help discusses the files you would need to change or update from the existing library/codec if you wanted to give this a try: http://www.exelisvis.com/docs/Creatin... I am not sure if it will translate to ENVI and there is no guarantee that the new libraries or codecs will work in the same way as the existing libraries.