视频直播时，报如下信息，请问是什么情况？

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[swscaler @ 0x4e4a000] No accelerated colorspace conversion found from yuv420p to bgra.

[libx264 @ 0x1c58c00] frame I:560   Avg QP:25.16  size:  4515

[libx264 @ 0x1c58c00] frame P:580   Avg QP:25.19  size:  3468

[libx264 @ 0x1c58c00] mb I  I16..4: 89.9%  0.0% 10.1%

[libx264 @ 0x1c58c00] mb P  I16..4: 18.5%  0.0%  4.7%  P16..4: 61.8%  0.0%  0.0%  0.0%  0.0%    skip:15.1%

[libx264 @ 0x1c58c00] coded y,uvDC,uvAC intra: 78.9% 58.6% 23.2% inter: 31.8% 33.4% 0.5%

[libx264 @ 0x1c58c00] i16 v,h,dc,p: 18% 21% 42% 19%

[libx264 @ 0x1c58c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 26% 26%  3%  6%  4%  5%  3%  8%

[libx264 @ 0x1c58c00] i8c dc,h,v,p: 62% 19% 17%  3%

[libx264 @ 0x1c58c00] Weighted P-Frames: Y:27.1% UV:10.9%

[libx264 @ 0x1c58c00] ref P L0: 79.1% 20.9%

[libx264 @ 0x1c58c00] kb/s:254.87

而且在直播进行时，一直出现打印[swscaler @ 0x4e4a000] No accelerated colorspace conversion found from yuv420p to bgra.

请问如何解决？