Question

我正在使用Raspberry Pi3而我正试图通过我的无线IP摄像头获取RTSP流，但是我收到了这个错误：

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.

我使用的RTSP链接是： RTSP：//192.168.1.230：554 / onvif1

或与用户：pwd是：

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

它在我的alprd.conf中的方式：

; 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

我可以使用VLC（在我的计算机和RPI中）连接而没有任何问题，但是当我在.conf文件中使用它以便使用 alprd -f 命令开始检查许可证时我得到了这个错误：/

我真的是编程的新手，所以请不要太具体，因为我可能不会理解哈哈哈

谢谢你们！爱你所有＆lt; 3

Answer 1

我遇到了类似的问题，请尝试ffplay -rtsp_transport tcp rtsp//:...如果你得到同样的错误，你需要更改opencv ffmpeg_cap_impl.hpp来源，因为这个param是硬编码的。

Answer 2

在 OpenCV 3.4.1 ，您可以将env变量 OPENCV_FFMPEG_CAPTURE_OPTIONS 更改为＆＃34; rtsp_transport; 0＆＃34;。

这个env var在cap_ffmpeg_impl.hpp中被考虑在内。

#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

无法获得RTSP流 - 不匹配

2 个答案: