private static void DisposeFacelessFrames(IList<Frame> motionFrames, ImageProcess.Target[] portraits)
{
var noPortraitFrameQuery = from m in motionFrames
where !portraits.Any(t => t.BaseFrame.guid.Equals(m.Guid))
select m;
Array.ForEach(noPortraitFrameQuery.ToArray(), mf => { motionFrames.Remove(mf); mf.Dispose(); });
}