AW: Convert pipeline to C code to play .mov video

[Thornton, Keith]

The decoder needs dynamic pads. Read the chapter in the application developers manual about dynamic sometimes pads.

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Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org] Im Auftrag von Raheeb
Gesendet: Dienstag, 10. März 2015 16:01
An: gstreamer-devel at lists.freedesktop.org
Betreff: Convert pipeline to C code to play .mov video

Hi I am trying to convert the following pipeline to C code. There is no error but I am unable to play the video through my code. The below pipeline plays the video but the my code does not. Can someone correct me with the code. Here is my pipeline

gst-launch-1.0 filesrc location=/path/a.mov ! qtdemux ! avdec_h264 ! xvimagesink

Here is my code

static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer data) {

GMainLoop *loop = (GMainLoop *) data;

switch (GST_MESSAGE_TYPE (msg)) {

case GST_MESSAGE_EOS:

g_print ("End of stream\n");

g_main_loop_quit (loop);

break;

case GST_MESSAGE_ERROR: {

gchar *debug;

GError *error;

gst_message_parse_error (msg, &error, &debug);

g_free (debug);

g_printerr ("Error: %s\n", error->message);

g_error_free (error);

g_main_loop_quit (loop);

break;

}

default: break; }

return TRUE; }

int main (int argc, char *argv[])

{

GMainLoop *loop;

GstElement *pipeline, *source, *demuxer, *decoder, *xvsink;

GstBus *bus;

guint bus_watch_id;

gst_init (&argc, &argv);

loop = g_main_loop_new (NULL, FALSE);

/* Check input arguments */

if (argc != 2) {

g_printerr ("Usage: %s \n", argv[0]);

return -1;

}

/* Create gstreamer elements */ pipeline = gst_pipeline_new ("video-send");

source = gst_element_factory_make ("filesrc", "file-source");

g_assert (source);

demuxer = gst_element_factory_make ("qtdemux", "demuxer");

g_assert (demuxer);

decoder = gst_element_factory_make ("avdec_h264", "decoder");

g_assert (decoder);

xvsink = gst_element_factory_make ("xvimagesink", "video-output");

g_assert (xvsink);

g_object_set (G_OBJECT (source), "location", argv[1], NULL);

bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));

bus_watch_id = gst_bus_add_watch (bus, bus_call, loop);

gst_object_unref (bus);

gst_bin_add_many (GST_BIN (pipeline), source, demuxer, decoder, xvsink, NULL);

if(!gst_element_link (source, demuxer))

{

g_printerr ("Here is the problem 1.\n");

}

if(!gst_element_link_many (decoder, xvsink, NULL))

{

g_printerr ("Here is the problem too.\n");

}

g_print ("Now playing: %s\n", argv[1]);

gst_element_set_state (pipeline, GST_STATE_PLAYING);

g_print ("Running...\n");

g_main_loop_run (loop);

/* Out of the main loop*/

g_print ("Returned, stopping playback\n");

gst_element_set_state (pipeline, GST_STATE_NULL);

g_print ("Deleting pipeline\n");

gst_object_unref (GST_OBJECT (pipeline));

g_source_remove (bus_watch_id);

g_main_loop_unref (loop);

return 0;

}


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