rv1126跑例程rkmedia_vi_rockx_venc_rtsp_test成功，却vlc拉流不了

[RKMEDIA][VENC][Info]:MPP Encoder[JPEG]: rotaion = 0
[RKMEDIA][VENC][Info]:MPP Encoder[JPEG]: Set output block mode.
[RKMEDIA][VENC][Info]:MPP Encoder[JPEG]: Set input block mode.
mpp[793]: mpp_enc: MPP_ENC_SET_RC_CFG bps 0 [0 : 0] fps [30:30] gop 0
mpp[793]: jpege_api_v2: jpege_proc_jpeg_cfg qf_min out of range, default set 1
mpp[793]: jpege_api_v2: jpege_proc_jpeg_cfg qf_max out of range, default set 99
[RKMEDIA][VENC][Info]:MPP Encoder[JPEG]: w x h(720[720] x 540[540]), qfactor:50
[RKMEDIA][SYS][Info]:RK_MPI_VENC_CreateChn: Enable VENC[2], Type:7 End…
create rknn_list success

Start MainStream thread, arg:0xaea31b50

x_rate is 0.375000, y_rate is 0.500000

Start GetMediaBuffer thread, arg:0xaea31ac4

librknn_runtime version 1.7.0 (0bef7b3 build: 2021-08-18 19:54:13 base: 1131)
ROCKX_MODULE_PERSON_DETECTION_V2 rockx_create success
……
[DEBUG rtsp_demo.c:1024:rtsp_handle_PLAY]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 5
Date: Thu Jan 1 01:47:24 1970
Session: 12345679
Server: rtsp_demo

[DEBUG rtsp_msg.c:865:rtsp_msg_parse_from_array]
TEARDOWN rtsp://192.168.1.42:554/live/main_stream RTSP/1.0
CSeq: 6
User-Agent: LibVLC/3.0.21 (LIVE555 Streaming Media v2016.11.28)
Session: 12345679

$
[DEBUG rtsp_demo.c:1048:rtsp_handle_TEARDOWN]
[DEBUG rtsp_msg.c:998:rtsp_msg_build_to_array]
RTSP/1.0 200 OK
CSeq: 6
Date: Thu Jan 1 01:47:35 1970
Session: 12345679
Server: rtsp_demo

[DEBUG rtsp_demo.c:1145:rtsp_recv_msg] peer closed
[INFO rtsp_demo.c:428:rtsp_del_client_connection] delete client 42 from 192.168.1.192
不知道什么原因，求指点