Hi, I try to play an avi, I know there's playbin2 option, but I want to gain more control and understand some issues as well.<br><br>I can play an avi from console with this command.<br>gst-launch filesrc location=/home/rossana/video11.avi ! avidemux name=demux demux.audio_00 ! decodebin ! queue ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! decodebin ! queue ! ffmpegcolorspace ! videoscale ! autovideosink"<br>
<br>I tempted to translate into C/C++ code, but I got errors "caps incompatible"<br><br>Thanks<br><br>Rossana<br><br><br>void on_pad_added (GstElement *element, GstPad *pad, GstElement *data)<br>{<br> g_debug ("Signal: pad-added");<br>
GstCaps *caps;<br> GstStructure *str;<br><br> caps = gst_pad_get_caps (pad);<br> g_assert (caps != NULL);<br> str = gst_caps_get_structure (caps, 0);<br> g_assert (str != NULL);<br>
<br> cout << "enlazando enlazara pads" << endl << endl;<br> if (g_strrstr (gst_structure_get_name (str), "video")) {<br> g_debug ("Linking video pad to dec_vd");<br>
// Link it actually<br> //GstPad *targetsink = gst_element_get_pad (decvd, "sink");<br> GstPad *targetsink = gst_element_get_pad (data, "sink");<br> cout << "enlazando cola de video" << endl << endl;<br>
g_assert (targetsink != NULL);<br> gst_pad_link (pad, targetsink);<br> gst_object_unref (targetsink);<br> }<br><br> if (g_strrstr (gst_structure_get_name (str), "audio")) {<br>
g_debug ("Linking audio pad to dec_ad");<br> // Link it actually<br> //GstPad *targetsink = gst_element_get_pad (decad, "sink");<br> GstPad *targetsink = gst_element_get_pad (data, "sink");<br>
cout << "enlazando cola de audio" << endl << endl;<br> g_assert (targetsink != NULL);<br> gst_pad_link (pad, targetsink);<br> gst_object_unref (targetsink);<br>
}<br><br> gst_caps_unref (caps);<br>}<br><br><br><br>int main (int argc, char *argv[])<br>{<br> GMainLoop *loop;<br><br> GstElement *pipeline;<br> GstBus *bus;<br><br> /* Initialisation */<br> gst_init (&argc, &argv);<br>
<br> loop = g_main_loop_new (NULL, FALSE);<br><br><br> /* Check input arguments */<br> if (argc != 1) {<br> g_printerr ("Usage: %s <AVI filename>\n", argv[0]);<br> return -1;<br> }<br><br> /* Create gstreamer elements */<br>
pipeline = gst_pipeline_new ("media-player");<br> source = gst_element_factory_make ("filesrc", "file-source");<br> demuxer = gst_element_factory_make ("avidemux", "avi-demuxer");<br>
decvd = gst_element_factory_make ("decodebin2", "decvd");<br> decad = gst_element_factory_make ("decodebin2", "decad");<br> aconvert = gst_element_factory_make ("audioconvert", "aconvert");<br>
asample = gst_element_factory_make ("audioresample", "asample");<br> vdsink = gst_element_factory_make ("autovideosink", "video-sink");<br> vdqueue = gst_element_factory_make ("queue", "video-queue");<br>
adqueue = gst_element_factory_make ("queue", "audio-queue");<br> adsink = gst_element_factory_make ("autoaudiosink", "audio-sink");<br> color = gst_element_factory_make("ffmpegcolorspace","color");<br>
vscale = gst_element_factory_make("videoscale","vscale");<br><br> if (!pipeline || !source || !demuxer || !decvd || !decad || !vdsink || !vdqueue || !adqueue || !adsink) {<br> g_printerr ("One element could not be created. Exiting.\n");<br>
return -1;<br> }<br><br> /* Set up the pipeline */<br><br> /* we set the input filename to the source element */<br> g_object_set (G_OBJECT (source), "location", "/home/videos/video11.avi", NULL);<br>
<br> /* we add a message handler */<br> bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));<br> gst_bus_add_watch (bus, bus_call, loop);<br> gst_object_unref (bus);<br><br> /* we add all elements into the pipeline */<br>
/* file-source | ogg-demuxer | vorbis-decoder | converter | alsa-output */<br> //GstElement *clk = gst_element_factory_make("clockoverlay","clk");<br><br><br> gst_bin_add_many (GST_BIN (pipeline),source, demuxer, decvd, decad, aconvert, vscale,asample,color,adqueue, vdqueue, vdsink, adsink, NULL);<br>
<br><br> /* we link the elements together */<br> /* file-source -> demuxer ~> {video-decoder -> video-output} ~> {audio-decoder -> alsa-output} */<br> gst_element_link (source, demuxer);<br> <br><br> GstPad *targetsrc = gst_element_get_pad(demuxer, "video_%02");<br>
<br> GstPad *targetsrc2 = gst_element_get_pad(demuxer, "audio_%02");<br><br><br> GstPad *padV = gst_element_get_static_pad(decvd,"sink");<br> GstPad *padA = gst_element_get_static_pad(decad,"sink");<br>
<br><br> gst_pad_link (targetsrc,padV);<br> gst_object_unref (targetsrc);<br><br><br> g_signal_connect (decvd, "pad-added", G_CALLBACK (on_pad_added), vdqueue);<br> cout << "decvd - vdqueue" << endl << endl;<br>
gst_element_link (vdqueue,color);<br> gst_element_link (color,vscale);<br> gst_element_link (vscale,vdsink);<br><br> gst_pad_link (targetsrc2,padA);<br> gst_object_unref (targetsrc2);<br> g_signal_connect (decad, "pad-added", G_CALLBACK (on_pad_added), adqueue);<br>
cout << "decad - adqueue" << endl << endl;<br> gst_element_link (adqueue, aconvert);<br> gst_element_link (aconvert, asample);<br> gst_element_link (asample, adsink);<br><br> <br><br> /* Set the pipeline to "playing" state*/<br>
g_print ("Playing: %s\n", argv[1]);<br> gst_element_set_state (pipeline, GST_STATE_PLAYING);<br><br> GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(pipeline), GST_DEBUG_GRAPH_SHOW_ALL,"playerdec1");<br><br><br>
g_main_loop_run (loop);<br><br><br> /* Out of the main loop, clean up nicely */<br> gst_element_set_state (pipeline, GST_STATE_NULL);<br> gst_object_unref (GST_OBJECT (pipeline));<br> //g_print ("Deleting pipeline\n");<br>
<br><br> return 0;<br>}<br><br><br><br><br><br>