ahem/gstreamer-experiments

Fun and games with the GStreamer tutorials

GStreamer tutorials

Setup

Install the following packages from Homebrew:

• llvm
• gstreamer
• gst-plugins-base
• gst-plugins-good
• gst-plugins-bad
• gstreamermm (for the experiments with the gstreamermm C++ wrappers)

Building the files

Just run make. This should build all the examples, and generate compile_commands.json files for editors. Build output is in _build.

Making Basic Tutorials run on OSX

The basic tutorials use helper funtions to run the main loop and retrieve messages from it (fx. gst_bus_timed_pop_filtered). This doesn't work on OSX. The required change is to remove the call to gst_bus_timed_pop_filtered and instead add real message handling with gst_bus_add_watch.

Before:

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);

After

static gboolean handle_message (GstBus *bus, GstMessage *msg, void *user_data) {
  switch (GST_MESSAGE_TYPE (msg)) {
    case GST_MESSAGE_ERROR: {
      g_main_loop_quit (main_loop);
      break;
    }
    case GST_MESSAGE_EOS:
      g_main_loop_quit (main_loop);
      break;
    default:
      break;
  }
  return TRUE;
}

bus = gst_element_get_bus (pipeline);
gst_bus_add_watch (bus, (GstBusFunc)handle_message, NULL);

main_loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (main_loop);

/* Free resources */
g_main_loop_unref (main_loop);
gst_object_unref (bus);