It’s slow because you are using wireless network. It runs very smoothly for me when I watch movies from my DLNA client (PS3) over a wired connection. You cannot expect a smooth experience with wireless…just not enough bandwidth for smoth video playback.
You viewing experience when streaming should be the same whether you are connected via wire or wirelessly as long as the client is not located too far away from your router. Check the wireless bars on the client, i.e. Smart TV. Also, are you able to view for example Netflix, Hulu, etc without a problem? I have a Smart TV and a PS3 located a the same spot and I have the hardest time with the wireless connection on the TV, the PS3 on the other hand which is also connected via wireless never has a problem streaming.
If you are running an old wireless ‘B’ router / client then you will not have sufficient bandwidth to deliver HD quality video. You need to upgrade to at least an ‘N’ capable router and client, but if you are going to spend the money to upgrade why wouldn’t you upgrade to wireless AC? A wireless ‘AC’ router will be backwards compatilble with your ‘N’ or even older clients if properly setup. Just dont forget that both sides of the link (Router and Client) need to support the speed you are looking to achieve.
Exactly…both ends need to support the standard to achieve the speed. PS3 released in '06 has the g standard…slower than even n…I used to get okay quality with Netflix but used to buffer frequently. But ever since I wired it up to my gigabit LAN, both Netflix and HD videos from other DLNA servers stream smoothly.