[CentOS] webkit on CentOS 7.4

Hello is the webkit with CentOS 7.4 compiled with ENABLE_MEDIASOURCE ?

When I call the set_media_source function with TRUE and then ask
get_media_source function for the value it returns TRUE. I presume it would
no return TRUE if its not enabled.

However, my webpage with a video tag using webkit is not finding the
MediaSource.

Thanks,

Jerry