Question

我试图编写一个C应用程序以连接VLC RTSP（通过RTP）流并将帧另存为图像。我使用GStreamer RTSP库：https://gstreamer.freedesktop.org/documentation/gst-plugins-base-rtsp-1.0/index.html?gi-language=c

我已经编写了下面提供的一些简单代码，但是该应用程序等待来自VLC的消息。我不确定这是否是连接的好方法，但现在陷入困境。也许我应该先发送一些信息给VLC，但是我不知道该怎么办以及如何做。任何人都可以帮助或指出一些资源/示例如何使用GStreamer RTSP？

#include <gstreamer-1.0/gst/rtsp/rtsp.h>
#include <stdio.h>

int main() 
{
    GstRTSPUrl *gstUrl = NULL;
    const char* url = "rtsp://10.30.1.163:8554/test.sdp";
    if(gst_rtsp_url_parse(url, &gstUrl) == GST_RTSP_OK) {
        printf("URL PARSE");
        GstRTSPConnection *gstRTSPConnection = NULL;
        if(gst_rtsp_connection_create(gstUrl, &gstRTSPConnection) == GST_RTSP_OK) {
            printf("Connection created\n");
            GstRTSPMessage *message = NULL;
            gst_rtsp_message_new(&message);
            GstRTSPResult result = gst_rtsp_connection_connect_with_response(gstRTSPConnection, NULL, message);
            if(result == GST_RTSP_ETIMEOUT){
                printf("Timeout\n");
            } else if(result == GST_RTSP_OK) {
                printf("Connected\n");
                printf("%s\n", gst_rtsp_connection_get_ip(gstRTSPConnection));
                printf("Is tunelled: %d\n", gst_rtsp_connection_is_tunneled(gstRTSPConnection));
                gst_rtsp_connection_receive(gstRTSPConnection, message, NULL);
            }
        }
    }    

    return 0;
}

Answer 1

好的。我会处理的。问题是我需要首先根据RTSP协议向服务器发送一些消息。下面的解决方案（带有一些转储消息）：

#include <gstreamer-1.0/gst/rtsp/rtsp.h>
#include <stdio.h>

int main() 
{
    GstRTSPUrl *gstUrl = NULL;
    const char* url = "rtsp://10.30.1.163:8554";
    if(gst_rtsp_url_parse(url, &gstUrl) == GST_RTSP_OK) {
        printf("URL PARSE");
        GstRTSPConnection *gstRTSPConnection = NULL;
        if(gst_rtsp_connection_create(gstUrl, &gstRTSPConnection) == GST_RTSP_OK) {
            printf("Connection created\n");
            GstRTSPMessage *message = NULL;
            gst_rtsp_message_new(&message);
            GstRTSPResult result = gst_rtsp_connection_connect_with_response(gstRTSPConnection, NULL, message);
            if(result == GST_RTSP_ETIMEOUT){
                printf("Timeout\n");
            } else if(result == GST_RTSP_OK) {
                printf("Connected\n");
                printf("%s\n", gst_rtsp_connection_get_ip(gstRTSPConnection));
                printf("Is tunelled: %d\n", gst_rtsp_connection_is_tunneled(gstRTSPConnection));

                gst_rtsp_message_new(&message);
                gst_rtsp_message_init_request(message, GST_RTSP_DESCRIBE, "rtsp://10.30.1.163:8554/test.sdp");
                gst_rtsp_message_add_header(message, GST_RTSP_HDR_CSEQ, "1");
                printf("Message Type %d", gst_rtsp_message_get_type(message));


                gst_rtsp_message_dump(message);

                if(gst_rtsp_connection_send(gstRTSPConnection, message, NULL) == GST_RTSP_OK){
                    printf("Message sent");
                }else {
                    printf("Message not sent");
                }
                gst_rtsp_connection_receive(gstRTSPConnection, message, NULL);

                gst_rtsp_message_dump(message);
            }
        }
    }    

    return 0;
}

使用GstRTSP库将GStreamer连接到VLC

1 个答案: