[BUG]The video screen is blurry

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Describe the bug
The shared image is high-definition, but after exporting the RTMP stream, the image becomes very blurry

Egress Version
1.8.6

Egress Request
Call call = client.startRoomCompositeEgress(liveId, streamOutput, layout, null, encodingOptions);

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On the same server with the same encoding parameters, I have tried the startTrackCompositeEress method to export the RTMP stream, and the image is very high-definition. In contrast, the image quality of the stream exported through the startRoomComposite Egress method is blurry

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If you have encountered this problem before, I hope you can help me answer it. I really feel that everyone