change.txt

海康威视视频采集卡linux开发包4.22版

1. add heart beat while UDP connected and functions MP4_ClientSetHeartbeat is added to the client
   and functions MP4_ServerSetHeartbeat is added to the server

2. remove some bugs in client and server sdk, especially in multicast

3. improve GTK and QT demo, rewrite player demo

4. remove some bugs and improve playing sound in player sdk (in libm4play.so)

5. add functions Hik_PlayM4_SetJpegQuality and Hik_PlayM4_ConvertToJpegFile to get jpeg picture

6. add other playersdk functions, please refer to the pdf file of playersdk

7. support ds4008HS and ds4016HS card