我在运行：./encode -v test.264 -y 3 -I 3时，出现下面现象：
Encode demo started......
davinci_resizer davinci_resizer.2: RSZ_G_CONFIG:0:1:124
davinci_previewer davinci_previewer.2: ipipe_set_preview_config
vpfe-capture vpfe-capture: IPIPE Chained
vpfe-capture vpfe-capture: Resizer present
EVM: switch to tvp7002 HD video input
vpfe-capture vpfe-capture: width = 1920, height = 1080, bpp = 1
vpfe-capture vpfe-capture: adjusted width = 1920, height = 1080, bpp = 1, bytesp
erline = 1920, sizeimage = 3110400
vpfe-capture vpfe-capture: width = 1920, height = 1080, bpp = 1
vpfe-capture vpfe-capture: adjusted width = 1920, height = 1080, bpp = 1, bytesp
erline = 1920, sizeimage = 3110400
davinci_venc davinci_venc: Desired VENC clock not available
davinci_venc davinci_venc: PLL's doesnot yield required VENC clk
davinci_v4l2 davinci_v4l2.1: Before finishing with S_FMT:
layer.pix_fmt.bytesperline = 1920,
layer.pix_fmt.width = 1920,
layer.pix_fmt.height = 1080,
layer.pix_fmt.sizeimage =3110400
davinci_v4l2 davinci_v4l2.1: pixfmt->width = 1920,
layer->layer_info.config.line_length= 1920
ARM Load: 13% Video fps: 0 fps Video bit rate: 0 kbps Sound bit rate: 0 kbps Tim
e: 00:00:01 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolution: 1
920x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 0% Video fps: 0 fps Video bit rate: 0 kbps Sound bit rate: 0 kbps Time
: 00:00:02 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolution: 19
20x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 0% Video fps: 0 fps Video bit rate: 0 kbps Sound bit rate: 0 kbps Time
: 00:00:03 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolution: 19
20x1080 Sound Codec: N/A Sampling Freq: N/A
ARM Load: 0% Video fps: 0 fps Video bit rate: 0 kbps Sound bit rate: 0 kbps Time
: 00:00:03 Demo: Encode Display: 1080I 30Hz Video Codec: H.264 HP Resolution: 19
20x1080 Sound Codec: N/A Sampling Freq: N/A
........................
按ctrl+c终止运行：
tvp7002 1-005d: Write: retry ... 0
tvp7002 1-005d: Write: retry ... 1
tvp7002 1-005d: Write: retry ... 2
tvp7002 1-005d: Write: retry ... 3
tvp7002 1-005d: Unable to turn off decoder
vpfe-capture vpfe-capture: stream off failed in subdev
请问该如何解决davinci_venc davinci_venc: Desired VENC clock not available这个问题，谢谢
