With　rapid　development　of　wireless　mesh　networks,　it　becomes　more　and　more　important　to　guarantee　the　reliable　transmission　of　video　data　in　such　networks.　Video　data　requires　real-time　service,　which　presents　a　great　challenge　to　provide　QoS　guarantee　in　wireless　networks　where　the　bandwidth　is　insufficient.　In　this　paper,　an　efficient　video　transmission　scheme　is　proposed,　which　has　adopted　the　cross-layer　dynamic　queue　allocation　mechanism　to　transmit　the　video　frame,　and　chosen　to　drop　the　non-critical　video　frame　under　the　circumstances　of　heavy　network　load.　The　proposed　scheme　adopts　H.264/SVC　scalable　video　encoding　technology　and　QoS　guarantee　mechanism　of　the　IEEE　802.11e,　which　can　be　applied　to　any　cross-layer　encoding　video　transmission.　We　have　done　extensive　simulation　to　validate　our　proposed　scheme.　The　simulation　results　show　that　our　scheme　is　effective　in　terms　of　packet　loss　rate　and　the　replay　quality　of　the　received　video.