Question

我在我的ios应用程序中集成了GStreamer库1.12.2版本，该应用程序通过raspberry pi设备支持音频和视频流。已实施的功能如下： 1.一旦应用程序启动并在主屏幕上，视频流必须在我的应用程序中一直运行。 2.有一个用于接收音频的按钮以及无缝运行的视频流为此我创建了两个管道，一个用于视频，一个用于从raspberry pi设备到我的ios应用程序的音频。

我遇到了崩溃，因为在切换音频时尝试取消引用垃圾指针，即播放和暂停音频或让我的应用程序静止几分钟就会崩溃。

我附加了一些用于创建视频和音频管道的代码。 / *用于视频和音频覆盆子pi到ios app * /

-(void) app_function
{
    GstBus *bus;
    GSource *bus_source;
    GError *error = NULL;

    GstBus *bus1;
    GSource *bus_source1;

    GST_DEBUG ("Creating pipeline");

    /* Create our own GLib Main Context and make it the default one */
    context = g_main_context_new ();
    g_main_context_push_thread_default(context);

    // du to app recieve working fine
    audiopipeline = gst_parse_launch("udpsrc port=5001 caps=\"audio/x-raw, rate = 8000, format=S16LE, channels=2\"  !audioconvert ! audioresample ! autoaudiosink sync=false", &error);
    if (error) {
        gchar *message = g_strdup_printf("Unable to build audio pipeline: %s", error->message);
        g_clear_error (&error);
        [self setUIMessage:message];
        g_free (message);
        return;
    }
    error = NULL;
    pipeline =  gst_parse_launch("udpsrc port=5000 ! application/x-rtp, payload=96 ! rtph264depay ! avdec_h264 ! autovideosink sync=false text-overlay=false", &error);
    if (error) {
        gchar *message = g_strdup_printf("Unable to build video pipeline: %s", error->message);
        g_clear_error (&error);
        [self setUIMessage:message];
        g_free (message);
        return;
    }

    /**************** for video  *****************/
    /* Set the pipeline to READY, so it can already accept a window handle */
    gst_element_set_state(pipeline, GST_STATE_READY);

    video_sink = gst_bin_get_by_interface(GST_BIN(pipeline), GST_TYPE_VIDEO_OVERLAY);
    if (!video_sink) {
        GST_ERROR ("Could not retrieve video sink");
        return;
    }
    gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(video_sink), (guintptr) (id) ui_video_view);

    /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
    bus = gst_element_get_bus (pipeline);
    bus_source = gst_bus_create_watch (bus);
    g_source_set_callback (bus_source, (GSourceFunc) gst_bus_async_signal_func, NULL, NULL);
    g_source_attach (bus_source, context);
    g_source_unref (bus_source);
    g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, (__bridge void *)self);
    g_signal_connect (G_OBJECT (bus), "message::state-changed", (GCallback)state_changed_cb, (__bridge void *)self);
    gst_object_unref (bus);


    // for audio
    /**************** for audio **************/
    bus1 = gst_element_get_bus (audiopipeline);
    bus_source1 = gst_bus_create_watch (bus1);
    g_source_set_callback (bus_source1, (GSourceFunc) gst_bus_async_signal_func, NULL, NULL);
    g_source_attach (bus_source1, context);
    g_source_unref (bus_source1);
    g_signal_connect (G_OBJECT (bus1), "message::error", (GCallback)error_cb_audio, (__bridge void *)self);
    g_signal_connect (G_OBJECT (bus1), "message::state-changed", (GCallback)state_changed_cb_audio, (__bridge void *)self);
    gst_object_unref (bus1);

    //Create a GLib Main Loop and set it to run 
    GST_DEBUG ("Entering main loop...");
    main_loop = g_main_loop_new (context, FALSE);
    [self check_initialization_complete];
    g_main_loop_run (main_loop);
    GST_DEBUG ("Exited main loop");
    g_main_loop_unref (main_loop);
    main_loop = NULL;


    // Free resources 
    g_main_context_pop_thread_default(context);
    g_main_context_unref (context);
    gst_element_set_state (pipeline, GST_STATE_NULL);
    gst_object_unref (pipeline);

    gst_element_set_state (audiopipeline, GST_STATE_NULL);
    gst_object_unref (audiopipeline);

    return;
}

GStreamer IOS：运行音频和视频管道以获得糟糕的访问崩溃

0 个答案: