Camera: Error 2

[zzxabc]

When I use a VLC to connect to RTSP, the display is normal, but when I use a second VLC to connect, the first one will be stopped. The log is as follows:
2019-12-26 20:17:21.329 28836-31681/com.xzh.ipcamera I/RtspServer: Connection from 192.168.31.189
2019-12-26 20:17:21.331 28836-31681/com.xzh.ipcamera E/RtspServer: OPTIONS rtsp://192.168.31.29:8086/spydroid.sdp?id=0&h264=1000-20-480-320&flash=off&camera=front
2019-12-26 20:17:21.355 28836-31681/com.xzh.ipcamera E/RtspServer: DESCRIBE rtsp://192.168.31.29:8086/spydroid.sdp?id=0&h264=1000-20-480-320&flash=off&camera=front
2019-12-26 20:17:21.387 28836-31688/com.xzh.ipcamera E/VideoStream: zzx===>camera Id: 1
2019-12-26 20:17:21.382 28836-28836/com.xzh.ipcamera W/Thread-10: type=1400 audit(0.0:5278697): avc: denied { read } for name="u:object_r:camera_prop:s0" dev="tmpfs" ino=20798 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:camera_prop:s0 tclass=file permissive=0
2019-12-26 20:17:21.388 28836-31688/com.xzh.ipcamera E/libc: Access denied finding property "camera.hal1.packagelist"
2019-12-26 20:17:21.392 28836-28940/com.xzh.ipcamera E/Camera: Error 2
2019-12-26 20:17:21.392 28836-28940/com.xzh.ipcamera E/VideoStream: Error unknown with the camera: 2
2019-12-26 20:17:22.161 28836-31681/com.xzh.ipcamera E/RtspServer: SETUP 192.168.31.29:8086/trackID=1
2019-12-26 20:17:23.744 28836-31729/com.xzh.ipcamera I/OMXClient: Treble IOmx obtained
2019-12-26 20:17:23.751 28836-31729/com.xzh.ipcamera I/ExtendedACodec: setupVideoEncoder()
2019-12-26 20:17:23.753 28836-31729/com.xzh.ipcamera I/ACodec: setupAVCEncoderParameters with [profile: Main] [level: Level41]
2019-12-26 20:17:23.753 28836-31729/com.xzh.ipcamera I/ACodec: h264type nBFrames is 0, nAllowedPictureTypes is 3
2019-12-26 20:17:23.753 28836-31729/com.xzh.ipcamera I/ACodec: [OMX.google.h264.encoder] cannot encode color aspects. Ignoring.
2019-12-26 20:17:23.753 28836-31729/com.xzh.ipcamera I/ACodec: [OMX.google.h264.encoder] cannot encode HDR static metadata. Ignoring.
2019-12-26 20:17:23.753 28836-31729/com.xzh.ipcamera I/ACodec: setupVideoEncoder succeeded
2019-12-26 20:17:23.755 28836-31729/com.xzh.ipcamera W/ExtendedACodec: Failed to get extension for extradata parameter
2019-12-26 20:17:23.806 28836-31732/com.xzh.ipcamera I/MediaCodecInputStream: {max-bitrate=1000000, csd-1=java.nio.HeapByteBuffer[pos=0 lim=10 cap=10], mime=video/avc, width=416, bitrate=1000000, height=200, csd-0=java.nio.HeapByteBuffer[pos=0 lim=18 cap=18]}
2019-12-26 20:17:23.901 28836-31681/com.xzh.ipcamera E/RtspServer: PLAY 192.168.31.29:8086/
2019-12-26 20:17:31.900 28836-28939/com.xzh.ipcamera E/RtspServer: TEARDOWN 192.168.31.29:8086/
2019-12-26 20:17:31.962 28836-28939/com.xzh.ipcamera I/qtaguid: Untagging socket 62 failed errno=-22
2019-12-26 20:17:31.963 28836-28939/com.xzh.ipcamera I/RtspServer: Client disconnected
2019-12-26 20:17:45.618 28836-28843/com.xzh.ipcamera I/zygote64: Compiler allocated 6MB to compile void android.view.ViewRootImpl.performTraversals()
2019-12-26 20:18:11.658 28836-28843/com.xzh.ipcamera I/zygote64: Do full code cache collection, code=250KB, data=164KB
2019-12-26 20:18:11.659 28836-28843/com.xzh.ipcamera I/zygote64: After code cache collection, code=204KB, data=127KB
2019-12-26 20:18:21.924 28836-31681/com.xzh.ipcamera E/RtspServer: OPTIONS 192.168.31.29:8086/
2019-12-26 20:18:22.029 28836-31681/com.xzh.ipcamera E/RtspServer: TEARDOWN 192.168.31.29:8086/
2019-12-26 20:18:22.954 28836-31681/com.xzh.ipcamera I/qtaguid: Untagging socket 73 failed errno=-22
2019-12-26 20:18:22.955 28836-31681/com.xzh.ipcamera I/RtspServer: Client disconnected