ProRes 422 support in ffmpeg (which is the fallback decoder) is still really shaky. It's particularly complicated because in addition to the decoding it then needs to be converted from a 10bit planar format to an 8bit one (causing banding problems and other such horrors).
Unless version 1.0.2 helps (it might, I did update ffmpeg at one point), I don't think that codec will work yet so you'd need to either re-export in a different format or use a different compression tool.
Re: Another update
ProRes 422 support in ffmpeg (which is the fallback decoder) is still really shaky. It's particularly complicated because in addition to the decoding it then needs to be converted from a 10bit planar format to an 8bit one (causing banding problems and other such horrors).
Unless version 1.0.2 helps (it might, I did update ffmpeg at one point), I don't think that codec will work yet so you'd need to either re-export in a different format or use a different compression tool.