DM385 软件平台ipnc_rdk_3.8 不使用B帧，程序正常运行，启用B帧后，程序起不来，报错如下：
[m3video] 108505:!ERROR!:ENCLINK::links_m3video/iva_enc/encLink_h264.c:[277]::INTERNAL ERROR:-1
[m3video] ALGCONTROL FAILED:CMD:6
[m3video] ERROR: XDM_UNSUPPORTEDPARAM = 14,
[m3video] ERROR: XDM_FATALERROR = 15
[m3video] ERROR: IH264ENC_IMPROPER_POCTYPE = 18,
[m3video] 108506:!ERROR!:ENCLINK::links_m3video/iva_enc/encLink_h264.c:[277]::INTERNAL ERROR:-1
[m3video] ALGCONTROL FAILED:CMD:9
[m3video] ERROR: XDM_UNSUPPORTEDPARAM = 14,
[m3video] ERROR: XDM_FATALERROR = 15
[m3video] ERROR: IH264ENC_IMPROPER_POCTYPE = 18,
[m3video] 108506:!ERROR!:ENCLINK::links_m3video/iva_enc/encLink_h264.c:[277]::INTERNAL ERROR:-1
