Unsupport PixelInfo

[NianYi]

代码：
dst_md = sdk.MediaDesc().pixel_format(mp.kPF_RGB24)
np_vf = sdk.bmf_convert(vf, sdk.MediaDesc(), dst_md).frame().plane(0)
报错
RuntimeError: require false at /home/ansible/bmf/bmf/hmp/src/imgproc/imgproc.cpp:170, Unsupport PixelInfo
看了下视频帧vf信息：PixelFormat.kPF_NV12 ColorSpace.kCS_SMPTE170M
应该是不支持color_space=smpte170m的转换

[github-actions]

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