Cant get RTSP stream - nonmatching

问题:

I'm using Raspberry Pi3 and I`m trying to get a RTSP stream through my wireless IP camera, but I'm getting this error:

pi@raspberrypi:~ $ alprd -f INFO - Running OpenALPR daemon in the foreground. INFO - Using: /etc/openalpr/alprd.conf for daemon configuration Missing config value for company_id Missing config value for pattern INFO - Using: /home/pi/Database/pictures for storing valid plate images INFO - country: br -- config file: /etc/openalpr/openalpr.conf INFO - pattern:  INFO - Stream 1: rtsp://192.168.1.230:554/onvif1 INFO - Starting camera 1 INFO - Video stream connecting... [rtsp @ 0x71700960] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. INFO - Video stream connecting... [rtsp @ 0x71700840] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. INFO - Video stream connecting... [rtsp @ 0x71700960] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. INFO - Video stream connecting... [rtsp @ 0x71700840] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. INFO - Video stream connecting... [rtsp @ 0x71700960] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. INFO - Video stream connecting... [rtsp @ 0x71700840] Nonmatching transport in server reply WARN - Stream rtsp://192.168.1.230:554/onvif1 failed to open. 

or with the user:pwd is:

rtsp://2512398:123@192.168.1.230:554/onvif1

The way it is in my alprd.conf:

; Declare each stream on a separate line ; each unique stream should be defined as stream = [url]  stream = rtsp://192.168.1.230:554/onvif1 ;stream = http://192.168.1.36:8080/video ;stream = http://127.0.0.1/example_second_stream.mjpeg ;stream = webcam 

I can connect using VLC (in my computer and RPI) without any problems, but when I use it in my .conf file in order to use the command alprd -f to start checking for license plates I get that error :/

I'm really a novice in programming, so please don't go way too specific because I will probably not understand it hahaha

Thanks guys! Love u all <3

回答1:

I faced a similar problem, try ffplay -rtsp_transport tcp rtsp//:... if you get same error you need to change opencv ffmpeg_cap_impl.hpp source, because this param hardcoded.

回答2:

At OpenCV 3.4.1 you can change env variable OPENCV_FFMPEG_CAPTURE_OPTIONS to "rtsp_transport;0".

This env var is taken into account in cap_ffmpeg_impl.hpp.

#if USE_AV_INTERRUPT_CALLBACK     /* interrupt callback */     interrupt_metadata.timeout_after_ms = LIBAVFORMAT_INTERRUPT_OPEN_TIMEOUT_MS;     get_monotonic_time(&interrupt_metadata.value);      ic = avformat_alloc_context();     ic->interrupt_callback.callback = _opencv_ffmpeg_interrupt_callback;     ic->interrupt_callback.opaque = &interrupt_metadata; #endif  #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(52, 111, 0) #ifndef NO_GETENV     char* options = getenv("OPENCV_FFMPEG_CAPTURE_OPTIONS");     if(options == NULL)     {         av_dict_set(&dict, "rtsp_transport", "tcp", 0);     }     else     { #if LIBAVUTIL_BUILD >= (LIBAVUTIL_VERSION_MICRO >= 100 ? CALC_FFMPEG_VERSION(52, 17, 100) : CALC_FFMPEG_VERSION(52, 7, 0))         av_dict_parse_string(&dict, options, ";", "|", 0); #else         av_dict_set(&dict, "rtsp_transport", "tcp", 0); #endif     } #else     av_dict_set(&dict, "rtsp_transport", "tcp", 0); #endif     int err = avformat_open_input(&ic, _filename, NULL, &dict); #else     int err = av_open_input_file(&ic, _filename, NULL, 0, NULL); #endif 

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