Which parameter should I send to get Low or Mobile quality of Video?

Which parameter should I send to get Low or Mobile quality of Video?
to this link:

https://secure.twitch.tv/swflibs/TwitchPlayer.swf?channel=starladder1&playerType=facebook

&quality=Low …or what?

As far as I’m aware, there’s no way to force a resolution at this time. I think the Twitch homepage used to force 360p, but I don’t think the new flash player they released even supports that. I’m hoping they eventually add more detailed video info and resolution support into the player’s Javascript API.

thanks for you answer