Question

我有一个GUI，可以在上面播放视频。我将Gtk3.0用于GUI，并将gstreamer1.0用于播放视频。但是当播放视频时，我想播放音频。因此，在播放视频时，我想给信息音频消息。播放音频时，视频应不间断播放。我使用gstreamer示例代码，并根据自己修改了代码。（示例代码为：https://gstreamer.freedesktop.org/documentation/tutorials/basic/toolkit-integration.html）我不知道如何在背景上添加第二个元素（音频）。我应该如何添加第二个元素？

Answer 1

您可以添加此形状。无需使用gst_init(&argc, &argv);。只需将pipeline添加到您的代码中即可。您可以找到此代码gstreamer网站。 https://gstreamer.freedesktop.org/documentation/tutorials/basic/hello-world.html

 #include <gst/gst.h>

int main(int argc, char *argv[]) {
  GstElement *pipeline;
  GstBus *bus;
  GstMessage *msg;

  /* Initialize GStreamer */
  gst_init (&argc, &argv);

  /* Build the pipeline */
  pipeline = gst_parse_launch ("playbin uri=https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm", NULL);

  /* Start playing */
  gst_element_set_state (pipeline, GST_STATE_PLAYING);

  /* Wait until error or EOS */
  bus = gst_element_get_bus (pipeline);
  msg = gst_bus_timed_pop_filtered (bus, GST_CLOCK_TIME_NONE, GST_MESSAGE_ERROR | GST_MESSAGE_EOS);

  /* Free resources */
  if (msg != NULL)
    gst_message_unref (msg);
  gst_object_unref (bus);
  gst_element_set_state (pipeline, GST_STATE_NULL);
  gst_object_unref (pipeline);
  return 0;
}

如何在GTK3.0中与gstreamer同时播放视频和音频

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