msdkenc: Add property to force IDR
The first property force-keyframe-interval is used to force keyframes between certain intervals; the second property force-idr is to force the keyframes set by the property force-keyframe-interval as idr frames.
The first property force-keyframe-interval is used to force keyframes between certain intervals; the second property force-idr is to force the keyframes set by the property force-keyframe-interval as idr frames.