GB28181的wvp开源项目 摄像头注册进来以后，点击播放光弹出窗口，不播视频。
这是我的日志打印
2023-05-17 20:15:52.405 INFO --- RegisterRequestProcessor : [注册请求] 开始处理: 39.82.235.41:5060
2023-05-17 20:15:52.405 INFO --- RegisterRequestProcessor : [注册请求] 注册续订: 44010200492000000001
2023-05-17 20:15:52.406 INFO --- DeviceServiceImpl : [设备上线] deviceId：44010200492000000001->39.82.235.41:5060
2023-05-17 20:18:50.312 INFO --- ZLMRTPServerFactory : {"code":0,"exist":false}
2023-05-17 20:18:50.319 INFO --- ZLMRTPServerFactory : {"code":0,"port":30046}
2023-05-17 20:18:50.320 INFO --- PlayServiceImpl : [点播开始] deviceId: 44010200492000000001, channelId: 34020000001320000020,收流端口： 30046, 收流模式：UDP, SSRC: 0102007531, SSRC校验：true
2023-05-17 20:18:50.321 INFO --- SIPCommander : 44010200492000000001_34020000001320000020 分配的ZLM为: FQ3TF8yT83wh5Wvz [172.17.250.220:30046]
2023-05-17 20:18:50.366 INFO --- InviteResponseProcessor : [回复ack] 44010200492000000001-> 39.82.235.41:5060
2023-05-17 20:18:50.813 INFO --- ZLMHttpHookListener : [ZLM HOOK]推流鉴权：FQ3TF8yT83wh5Wvz->rtp://39.82.235.41:15060/rtp/44010200492000000001_34020000001320000020?
2023-05-17 20:18:50.846 INFO --- ZLMHttpHookListener : 推流时发现尚未设置录像路径，从assist服务中读取
2023-05-17 20:18:50.848 ERROR --- AssistRESTfulUtils : 连接Assist失败: Connection refused (Connection refused), Failed to connect to /172.17.250.220:18081
2023-05-17 20:18:50.850 INFO --- AssistRESTfulUtils : 请检查media配置并确认Assist已启动...
2023-05-17 20:18:51.045 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注册, FQ3TF8yT83wh5Wvz->fmp4->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:18:51.047 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注册, FQ3TF8yT83wh5Wvz->rtsp->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:18:51.048 INFO --- PlayServiceImpl : 收到订阅消息： {"aliveSecond":0,"app":"rtp","bytesSpeed":0,"createStamp":1684325930,"docker":false,"mediaServerId":"FQ3TF8yT83wh5Wvz","originSock":{"identifier":"44010200492000000001_34020000001320000020","local_ip":"172.17.250.220","local_port":30046,"peer_ip":"39.82.235.41","peer_port":15060},"originType":3,"originTypeStr":"rtp_push","originUrl":"rtp://__defaultVhost__/rtp/44010200492000000001_34020000001320000020","regist":true,"schema":"rtsp","stream":"44010200492000000001_34020000001320000020","totalReaderCount":"0","tracks":[{"channels":0,"codecId":0,"codecType":0,"fps":10,"height":720,"ready":true,"sampleBit":0,"sampleRate":0,"width":1280}],"vhost":"__defaultVhost__"}
2023-05-17 20:18:51.164 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注册, FQ3TF8yT83wh5Wvz->ts->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:18:51.165 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注册, FQ3TF8yT83wh5Wvz->rtmp->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:18:51.203 INFO --- PlayServiceImpl : [点播成功] deviceId: 44010200492000000001, channelId: 34020000001320000020
2023-05-17 20:18:51.204 INFO --- PlayServiceImpl : [请求截图]: 44010200492000000001_34020000001320000020.jpg
2023-05-17 20:18:51.207 INFO --- ZLMRESTfulUtils : Request{method=GET, url=http://172.17.250.220/index/api/getSnap?secret=035c73f7-bb6b-4889-a715-d9eb2d1925cc&expire_sec=1&url=rtsp%3A%2F%2F127.0.0.1%3A554%2Frtp%2F44010200492000000001_34020000001320000020&timeout_sec=15}
2023-05-17 20:18:56.174 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注册, FQ3TF8yT83wh5Wvz->hls->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:19:16.176 INFO --- ZLMHttpHookListener : [ZLM HOOK]流无人观看：{]->hls->rtp/44010200492000000001_34020000001320000020FQ3TF8yT83wh5Wvz
2023-05-17 20:19:16.190 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注销, FQ3TF8yT83wh5Wvz->hls->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:19:16.191 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注销, FQ3TF8yT83wh5Wvz->rtmp->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:19:16.192 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注销, FQ3TF8yT83wh5Wvz->rtsp->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:19:16.192 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注销, FQ3TF8yT83wh5Wvz->fmp4->rtp/44010200492000000001_34020000001320000020
2023-05-17 20:19:16.193 INFO --- ZLMHttpHookListener : [ZLM HOOK] 流注销, FQ3TF8yT83wh5Wvz->ts->rtp/44010200492000000001_34020000001320000020
参考GPT和自己的思路：根据您提供的日志信息，点播请求已经成功，并且成功获取流并播放。但是在请求截图时，出现了连接Assist失败的错误。Assist是一个媒体服务的辅助系统，该错误可能是由于Assist服务未启动或配置不正确导致的。建议您检查Assist的配置并确认它已启动，以解决该问题。如果问题仍然存在，您也可以尝试使用其他截图服务进行截图，例如FFmpeg等。