求解关于hi3520D sample_venc 的问题

hi3520D 前进接it6604 运行sample出错，找不到原因
# ./sample_venc 1
[SAMPLE_COMM_SYS_CalcPicVbBlkSize]-167: w:1280, u32AlignWidth:64
please choose rc mode:
        0) CBR
        1) VBR
        2) FIXQP
0
please press twice ENTER to exit this sample
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
[SAMPLE_COMM_VENC_GetVencStreamProc]-1101: get venc stream time out, exit thread
***link down status changed***.
PHY: himii:03 - Link is Down