Video transmission control method and system

The invention discloses a video transmission control method, which comprises the following steps that: during the video transmission process, the network real-time situation and the video state information are collected, and the collected information is undertaken the normalization processing; the video quality is estimated according to the normalized network and video state information, and a video encoding rate is calculated; and according to the calculated video encoding rate, the video is undertaken the encoding compression processing, and the video after the compression processing is transmitted. Under the condition that the present network is free from being modified, and especially under the condition that the core devices of the present network are free from being modified, the real-time video quality can be well improved; therefore, the video transmission control method avoids the risk for modifying the present network, can be rapidly arranged and implemented, and can realize the wide video quality guarantee for ordinary users.