vlc读不出来视频

[Shell-picking]

打印信息：Start capture: /dev/video0
PYUVC version: 0.3
frame size: 1280*720
frame rate: 30
fmt type: 875967048
Driver: "uvcvideo"
Card: "H264 USB Camera: USB Camera"
Bus: "usb-0000:02:03.0-1"
Version: 1.0
Capabilities: 84a00001
Input: 0
V4L2 pixel formats:
0: [0x47504A4D] 'MJPG' (Motion-JPEG)
1: [0x56595559] 'YUYV' (YUYV 4:2:2)
PYLIVE version: 0.3
unicast url: unicast
Number of frame queue(queueSize): 10
rtspPort: 8554
rtspOverHTTPPort: 0
verbose(0,1,2): 0
RTCP expiration timeout in seconds(timeout): 65
repeat config before IDR frame(repeatConfig): 1
audioFreq: 44100
audioNbChannels: 2
audioFmt(default S16_BE): 2019-06-02 11:17:53,526 [NOTICE] - pylive/LibLive.cpp:229
Create ALSA Source...default
2019-06-02 11:17:53,526 [NOTICE] - pylive/ALSACapture.cpp:27
Open ALSA device: "default"
2019-06-02 11:17:53,530 [NOTICE] - pylive/DeviceSource.cpp:63
begin thread
2019-06-02 11:17:53,572 [NOTICE] - pylive/ALSACapture.cpp:83
ALSA device: "default" buffer_size:1048576 period_size:1024 rate:44100
2019-06-02 11:17:53,574 [NOTICE] - pylive/LibLive.cpp:98
Play this stream using the URL "rtsp://192.168.167.130:8554/unicast"
2019-06-02 11:17:53,574 [NOTICE] - pylive/DeviceSource.cpp:63
begin thread
RTCPInstance::RTCPInstance error: totSessionBW parameter should not be zero!
RTCPInstance::RTCPInstance error: totSessionBW parameter should not be zero!
有没有人知道是怎末回事啊？