[gst-devel] gstreamer appliaction
Sedji Gaouaou
sedji.gaouaou at atmel.com
Mon Nov 30 17:28:26 CET 2009
Hi again ;)
I seems that it is working now, I was passing a wrong threshold timing...
Br,
Sedji
Sedji Gaouaou a écrit :
> Hi,
>
> Sorry to bother you again, but I have changed my apps accordingly to the
> comments of Kapil:
> In on_pad_added, I am nw using the queue:
> void on_pad_added (GstElement *element, GstPad *pad)
> {
> g_debug ("Signal: pad-added");
> GstCaps *caps;
> GstStructure *str;
> gchar *name;
>
> caps = gst_pad_get_caps (pad);
> g_assert (caps != NULL);
> name = gst_pad_get_name (pad);
> g_print ("Name of the pad %s\n", name);
> g_free (name);
>
> str = gst_caps_get_structure (caps, 0);
> g_assert (str != NULL);
>
> if (g_strrstr (gst_structure_get_name (str), "video")) {
> g_debug ("Linking video pad to dec_vd");
> // Link it actually
> GstPad *targetsink = gst_element_get_pad (vdqueue, "sink");
> g_assert (targetsink != NULL);
> gst_pad_link (pad, targetsink);
> gst_object_unref (targetsink);
> }
>
> if (g_strrstr (gst_structure_get_name (str), "audio")) {
> g_debug ("Linking audio pad to dec_ad");
> // Link it actually
> GstPad *targetsink = gst_element_get_pad (adqueue, "sink");
> g_assert (targetsink != NULL);
> gst_pad_link (pad, targetsink);
> gst_object_unref (targetsink);
> }
>
> gst_caps_unref (caps);
> }
>
> And in my main I have done:
>
> /* demux only */
> gst_bin_add_many (GST_BIN (pipeline),
> source, demuxer, NULL);
>
> /* video only */
> gst_bin_add_many (GST_BIN (pipeline), vdqueue, decvd, vdsink, NULL);
>
> /* audio only */
> gst_bin_add_many (GST_BIN (pipeline), adqueue, decad, adsink, NULL);
>
> /* we link the elements together */
> /* file-source -> demuxer ~> decoder -> image sink */
> gst_element_link (source, demuxer);
>
> if(!gst_element_link_many( vdqueue, decvd, vdsink, NULL)) {
> printf("problem linking video elements!!!!!\n");
> return FALSE;
> }
>
> if(!gst_element_link_many( adqueue, decad, adsink, NULL)) {
> printf("problem linking audio elements!!!!!\n");
> return FALSE;
> }
>
> g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), NULL);
>
> So basically I should have:
>
> |source | demux | ---> |video decod|video sink(ximagesink|
> ---> |audio decod| alsasink|
>
> But when I try to play an avi file, it stucks...I guess there is a pb
> with the thread or something...
>
> Here is the message:
>
> root at at91sam9m10ekes:/# ./player mnt/video/test.avi
> Now playing: mnt/video/test.avi
> ** (player:2628): DEBUG: Signal: pad-added
> Name of the pad video_00 --> so video pad is ok
> ** (player:2628): DEBUG: Linking video pad to dec_vd
> ** (player:2628): DEBUG: Signal: pad-added
> Name of the pad audio_00 --> so audio pad is ok
> ** (player:2628): DEBUG: Linking audio pad to dec_ad
> Running...
>
>
> And it is stuck here with no video nor sound playing...
>
> Has anyone got an idea?
>
> BR,
> Sedji
>
>> On Thu, Nov 26, 2009 at 9:52 PM, Kapil Agrawal <kapil.agl at gmail.com> wrote:
>>> you should be adding respective queue before the audio and video decoder
>>> (essentially after the demuxer), and in the on_pad_added connect to the
>>> sinkpad of those queue.
>>>
>
>>>> #include <gst/gst.h>
>>>> #include <glib.h>
>>>> #include <string.h>
>>>>
>>>>
>>>> static GstElement *source, *demuxer, *vdqueue, *adqueue, *vdsink,
>>>> *adsink, *decvd, *decad;
>>>>
>>>> void on_pad_added (GstElement *element, GstPad *pad)
>>>> {
>>>> g_debug ("Signal: pad-added");
>>>> GstCaps *caps;
>>>> GstStructure *str;
>>>>
>>>> caps = gst_pad_get_caps (pad);
>>>> g_assert (caps != NULL);
>>>> str = gst_caps_get_structure (caps, 0);
>>>> g_assert (str != NULL);
>>>>
>>>> if (g_strrstr (gst_structure_get_name (str), "video")) {
>>>> g_debug ("Linking video pad to dec_vd");
>>>> // Link it actually
>>>> GstPad *targetsink = gst_element_get_pad (decvd, "sink");
>>>> g_assert (targetsink != NULL);
>>>> gst_pad_link (pad, targetsink);
>>>> gst_object_unref (targetsink);
>>>> }
>>>>
>>>> if (g_strrstr (gst_structure_get_name (str), "audio")) {
>>>> g_debug ("Linking audio pad to dec_ad");
>>>> // Link it actually
>>>> GstPad *targetsink = gst_element_get_pad (decad, "sink");
>>>> g_assert (targetsink != NULL);
>>>> gst_pad_link (pad, targetsink);
>>>> gst_object_unref (targetsink);
>>>> }
>>>>
>>>> gst_caps_unref (caps);
>>>> }
>>>>
>>>> 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;
>>>> GstBus *bus;
>>>>
>>>> /* Initialisation */
>>>> gst_init (&argc, &argv);
>>>>
>>>> loop = g_main_loop_new (NULL, FALSE);
>>>>
>>>>
>>>> /* Check input arguments */
>>>> if (argc != 2) {
>>>> g_printerr ("Usage: %s <Video H264 filename>\n", argv[0]);
>>>> return -1;
>>>> }
>>>>
>>>> /* Create gstreamer elements */
>>>> pipeline = gst_pipeline_new ("media-player");
>>>> source = gst_element_factory_make
>>>> ("filesrc","file-source");
>>>> demuxer = gst_element_factory_make
>>>> ("avidemux","avi-demuxer");
>>>> decvd = gst_element_factory_make ("x170",
>>>> "video-decoder");
>>>> decad = gst_element_factory_make ("mad", "mp3-decoder");
>>>> vdsink = gst_element_factory_make ("ximagesink",
>>>> "video-sink");
>>>> vdqueue = gst_element_factory_make ("multiqueue",
>>>> "video-queue");
>>>> adqueue = gst_element_factory_make ("multiqueue",
>>>> "audio-queue");
>>>> adsink = gst_element_factory_make ("osssink",
>>>> "audio-sink");
>>>>
>>>> /* if needed to be set to MPEG4(value 4), default is AUTO */
>>>> //g_object_set (decvd, "codec", 4, NULL);
>>>> /* output format: RGB16 (i.e 2) */
>>>> g_object_set (decvd, "output", 2, NULL);
>>>> /* Scaling value */
>>>> g_object_set (decvd, "scaling", 1.0, NULL);
>>>> /* Threshold of the VDEC to sync audio and video */
>>>> g_object_set (decvd, "inbuf-thresh", 100000, NULL);
>>>>
>>>> if (!pipeline || !source || !demuxer || !decvd || !vdsink ||
>>>> !vdqueue
>>>> || !decad || !adqueue || !adsink) {
>>>> g_printerr ("One element could not be created.
>>>> Exiting.\n");
>>>> return -1;
>>>> }
>>>>
>>>> /* Set up the pipeline */
>>>>
>>>> /* we set the input filename to the source element */
>>>> g_object_set (G_OBJECT (source), "location", argv[1], NULL);
>>>>
>>>> /* we add a message handler */
>>>> bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
>>>> gst_bus_add_watch (bus, bus_call, loop);
>>>> gst_object_unref (bus);
>>>>
>>>> /* we add all elements into the pipeline */
>>>> /* file-source | avi-demuxer | x170-decoder | ximagesink
>>>> * | mad | audioconvert | osssink*/
>>>>
>>>> /* demux only */
>>>> gst_bin_add_many (GST_BIN (pipeline),
>>>> source, demuxer, NULL);
>>>>
>>>> /* video only */
>>>> gst_bin_add_many (GST_BIN (pipeline),
>>>> decvd, vdqueue, vdsink, NULL);
>>>>
>>>> /* audio only */
>>>> gst_bin_add_many (GST_BIN (pipeline),
>>>> decad, adqueue, adsink, NULL);
>>>>
>>>> /* we link the elements together */
>>>> /* file-source -> demuxer ~> decoder -> image sink */
>>>> gst_element_link (source, demuxer);
>>>>
>>>> if(!gst_element_link_many(decvd, vdqueue, vdsink, NULL)) {
>>>> printf("problem linking video elements!!!!!\n");
>>>> return FALSE;
>>>> }
>>>>
>>>> if(!gst_element_link_many( decad, adqueue, adsink, NULL)) {
>>>> printf("problem linking audio elements!!!!!\n");
>>>> return FALSE;
>>>> }
>>>>
>>>> gst_element_link_pads (demuxer, "video", vdqueue, "sink");
>>>> gst_element_link_pads (demuxer, "audio", adqueue, "sink");
>>>>
>>>> g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added),
>>>> NULL);
>>>>
>>>> /* note that the demuxer will be linked to the decoder dynamically.
>>>> The reason is that Ogg may contain various streams (for example
>>>> audio and video). The source pad(s) will be created at run time,
>>>> by the demuxer when it detects the amount and nature of streams.
>>>> Therefore we connect a callback function which will be executed
>>>> when the "pad-added" is emitted.*/
>>>>
>>>> /* Set the pipeline to "playing" state*/
>>>> g_print ("Now playing: %s\n", argv[1]);
>>>> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>>>>
>>>>
>>>> /* Iterate */
>>>> g_print ("Running...\n");
>>>> g_main_loop_run (loop);
>>>>
>>>>
>>>> /* Out of the main loop, clean up nicely */
>>>> 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));
>>>>
>>>> return 0;
>>>> }
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
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>>>
>>> --
>>> http://www.linkedin.com/in/kapilagrawal
>>>
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>>> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>>>
>>>
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>
>
>
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