Videomixer fails on sources rather than Videotestsrc

[sarpkaya]

I want to play two different local video files at the same time in a single window. The code below without demux and decoder works fine.

----------------------------------Working Code-----------------

static void play_video(){

    GMainLoop *loop;
    GstElement *pipeline,*videomixer;
    GstElement *src,*sink,*filter,*csp,*videobox;
    GstElement *src1,*filter1,*csp1,*videobox1;
    GstElement *srcb,*filterb,*cspb,*videoboxb;
    GstCaps *filtercaps,*filtercaps1,*filtercapsb;
    GstPad *pad,*pad1;

    const char pattern = "snow";

    loop = g_main_loop_new(NULL, FALSE);

    pipeline = gst_pipeline_new("my-pipeline");
   
    src = gst_element_factory_make ("videotestsrc","src");
    src1 = gst_element_factory_make ("videotestsrc","src1");

g_object_set (G_OBJECT (src), "pattern", 10, NULL);
   
    filter = gst_element_factory_make("capsfilter","filter");
    filter1 = gst_element_factory_make("capsfilter","filter1");

    csp = gst_element_factory_make("ffmpegcolorspace","csp");
    csp1 = gst_element_factory_make("ffmpegcolorspace","csp1");

    /**/

    videobox=gst_element_factory_make("videobox","videobox");
    g_object_set(videobox,"top",0,"bottom",0,"left",0,"right",0,NULL);
    videobox1=gst_element_factory_make("videobox","videobox1");
    g_object_set(videobox1,"top",-20,"bottom",0,"left",0,"right",0,NULL);

    videomixer=gst_element_factory_make("videomixer","videomixer");


   
    /**/
    sink = gst_element_factory_make("xvimagesink","sink");
    if(sink == NULL)
        sink = gst_element_factory_make("ximagesink","sink");
        if(sink == NULL)
        g_error("'ximagesink' yaratılamadı.");

   

    gst_bin_add_many(GST_BIN(pipeline),src,filter,videobox,videomixer,csp,sink,
                     src1,filter1,videobox1,csp1,NULL);


   
    gst_element_link_many(src,filter,csp,videobox,videomixer,NULL);
    gst_element_link_many(src1,filter1,csp1,videobox1,videomixer,NULL);



    /*
videotestsrc pattern="snow" ! video/x-raw-yuv, framerate=1/1, width=350, height=250 ! \
     textoverlay font-desc="Sans 24" text="CAM2" valign=top halign=left shaded-background=true ! \
     videobox border-alpha=0 top=-200 left=-450 ! mix. \


     */
   

    gst_element_link_many(videomixer,sink,NULL);

    filtercaps = gst_caps_new_simple ("video/x-raw-rgb",
               "width", G_TYPE_INT, 1024,
               "height", G_TYPE_INT, 768,
               "framerate", GST_TYPE_FRACTION, 25, 1,
               "bpp", G_TYPE_INT, 16,
               "depth", G_TYPE_INT, 16,
               "endianness", G_TYPE_INT, G_BYTE_ORDER,
               NULL);

    filtercaps1 = gst_caps_new_simple ("video/x-raw-rgb",
               "width", G_TYPE_INT, 200,
               "height", G_TYPE_INT, 500,
               "framerate", GST_TYPE_FRACTION, 25, 1,
               "bpp", G_TYPE_INT, 16,
               "depth", G_TYPE_INT, 16,
               "endianness", G_TYPE_INT, G_BYTE_ORDER,
               NULL);

    g_object_set (G_OBJECT (filter), "caps", filtercaps, NULL);
    gst_caps_unref (filtercaps);

    g_object_set (G_OBJECT (filter1), "caps", filtercaps1, NULL);
    gst_caps_unref (filtercaps1);

    /*pad = gst_element_get_pad (src, "src");
    pad1 = gst_element_get_pad (src1, "src1");
   
    //gst_pad_add_buffer_probe (pad, G_CALLBACK (cb_have_data), NULL);
    //gst_pad_add_buffer_probe (pad1, G_CALLBACK (cb_have_data), NULL);  
    //gst_object_unref (pad);
    //gst_object_unref (pad1);*/  

    /* run */
    gst_element_set_state (pipeline, GST_STATE_PLAYING);

    /* wait until it's up and running or failed */
    if (gst_element_get_state (pipeline, NULL, NULL, -1) == GST_STATE_CHANGE_FAILURE) {
        g_error ("Failed to go into PLAYING state");
    }

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

    /* exit */
    gst_element_set_state (pipeline, GST_STATE_NULL);
    gst_object_unref (pipeline);
}


-----------------------------------------------------------------------
Problem is when I replace the videotestsrc with filesrc it fails and the only error message I get is "Could not lookup object NULL on signal destroy of object window"...I '  m not an gstreamer expert and my opinion is I am failing at setting demux and decoder..

-----------CODE THAT FAILS----------------

static void play_video5(){


        GMainLoop *loop;
    GstElement *pipeline,*videomixer;
    GstElement *src,*sink,*filter,*csp,*videobox;
    GstElement *src1,*filter1,*csp1,*videobox1;
    GstElement *srcb,*filterb,*cspb,*videoboxb;
    GstCaps *filtercaps,*filtercaps1,*filtercapsb;
    GstPad *pad,*pad1;

        GstElement *demux,*decoder;

    const char pattern = "snow";

    loop = g_main_loop_new(NULL, FALSE);

    pipeline = gst_pipeline_new("my-pipeline");


        //Source
    src = gst_element_factory_make ("videotestsrc","src");

        src1 = gst_element_factory_make ("filesrc","src1");
        g_object_set (G_OBJECT (src1), "location", "file:///root/yu.mp4", NULL);

        //Demux

        demux = gst_element_factory_make ("mpegdemux", "demux");

        //Decoder
        decoder = gst_element_factory_make ("decodebin", "decoder");
// decoder = gst_element_factory_make ("ffdec_mpeg4","mpeg4-decoder");
       
        //Filter
    filter = gst_element_factory_make("capsfilter","filter");
    filter1 = gst_element_factory_make("capsfilter","filter1");

        //Colorspace
    csp = gst_element_factory_make("ffmpegcolorspace","csp");
    csp1 = gst_element_factory_make("ffmpegcolorspace","csp1");


        //Videobox
    videobox=gst_element_factory_make("videobox","videobox");
    g_object_set(videobox,"top",0,"bottom",0,"left",0,"right",0,NULL);
    videobox1=gst_element_factory_make("videobox","videobox1");
    g_object_set(videobox1,"top",-20,"bottom",0,"left",0,"right",0,NULL);

        //videomixer
    videomixer=gst_element_factory_make("videomixer","videomixer");

        //Sink
    sink = gst_element_factory_make("xvimagesink","sink");
    if(sink == NULL)
        sink = gst_element_factory_make("ximagesink","sink");
        if(sink == NULL)
        g_error("'ximagesink' yaratılamadı.");

   
        //Add to Bin
    gst_bin_add_many(GST_BIN(pipeline),src,filter,videobox,videomixer,csp,
                     src1,decoder,filter1,videobox1,csp1,sink,NULL);

        //Link Elements
        gst_element_link(src,filter);
        gst_element_link(filter,csp);
        gst_element_link(csp,videobox);
        gst_element_link(videobox, videomixer);

        gst_element_link(src1,decoder);
        gst_element_link(decoder,filter1);
// gst_element_link(decoder,csp1);
        gst_element_link(filter1,csp1);
        gst_element_link(csp1,videobox1);
        gst_element_link(videobox1, videomixer);

        gst_element_link(videomixer,sink);
       


        //Cap definition
    filtercaps = gst_caps_new_simple ("video/x-raw-rgb",
               "width", G_TYPE_INT, 1024,
               "height", G_TYPE_INT, 768,
               "framerate", GST_TYPE_FRACTION, 25, 1,
               "bpp", G_TYPE_INT, 16,
               "depth", G_TYPE_INT, 16,
               "endianness", G_TYPE_INT, G_BYTE_ORDER,
               NULL);

    filtercaps1 = gst_caps_new_simple ("video/x-raw-yuv",
               "width", G_TYPE_INT, 640,
               "height", G_TYPE_INT, 480,
               "framerate", GST_TYPE_FRACTION, 25, 1,
               /*"bpp", G_TYPE_INT, 16,
               "depth", G_TYPE_INT, 16,
               "endianness", G_TYPE_INT, G_BYTE_ORDER,*/
               NULL);

        //Cap to Filter
    g_object_set (G_OBJECT (filter), "caps", filtercaps, NULL);
    gst_caps_unref (filtercaps);

    g_object_set (G_OBJECT (filter1), "caps", filtercaps1, NULL);
    gst_caps_unref (filtercaps1);


    /* run */
    gst_element_set_state (pipeline, GST_STATE_PLAYING);

    /* wait until it's up and running or failed */
    if (gst_element_get_state (pipeline, NULL, NULL, -1) == GST_STATE_CHANGE_FAILURE) {
        g_error ("Failed to go into PLAYING state");
    }

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

    /* exit */
    gst_element_set_state (pipeline, GST_STATE_NULL);
    gst_object_unref (pipeline);
}

----------------------------------------------------------------------------------------

Any ideas or corrections are welcome...

Thank you,