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[Johan Basore]

Hello,
I am building a video editing app for iOS with gstreamer 1.8.1.But I am having a problem with decodebin( especially demux).It says "Error received from element avidemux0 : Internal data stream error.".All types of movies have problem with demux.
Here are my source codes.
    GstBus *bus;    GSource *bus_source;
    GstElement *source1, *clrspace1, *clrspace2, *clrspace, *videobox1, *sink, *source2, *mpegenc, *avimux;    GstElement *videomixer;    GstElement *decodebin1, *decodebin2;    GstElement *queue;    //GstElement *matroskademux1, *vorbisdec, *audioconvert, *audioresample, *audiosink;    //GstElement *matroskademux1, *vp8dec1, *matroskademux2, *vp8dec2;            GST_DEBUG ("Creating pipeline");        /* Create our own GLib Main Context and make it the default one */    context = g_main_context_new ();    g_main_context_push_thread_default(context);/****************************************************************************************************************************/    /* Build pipeline */    pipeline = gst_pipeline_new("pipelinecomposer");    source1 = gst_element_factory_make("filesrc", "source1");    source2 = gst_element_factory_make("filesrc", "source2");    videobox1 = gst_element_factory_make("videobox", "videobox");    videomixer = gst_element_factory_make("videomixer", "videomixer");    clrspace1 = gst_element_factory_make("videoconvert", "clrspace1");    clrspace2 = gst_element_factory_make("videoconvert", "clrspace2");    clrspace = gst_element_factory_make("videoconvert", "clrspace");    sink = gst_element_factory_make("filesink", "sink");    mpegenc = gst_element_factory_make("x264enc", "mpegenc");    avimux = gst_element_factory_make("mpegtsmux", "avimux");    decodebin1 = gst_element_factory_make("decodebin", "decodebin1");    decodebin2 = gst_element_factory_make("decodebin", "decodebin2");    queue = gst_element_factory_make("queue", "queue");            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentsDirectory = [paths objectAtIndex:0];    NSString *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory, @"1.avi"];        NSString *filePath_1 = [NSString stringWithFormat:@"%@/%@", documentsDirectory, @"1.webm"];    NSString *filePath_2 = [NSString stringWithFormat:@"%@/%@", documentsDirectory, @"2.webm"];        g_object_set (source1, "location", [filePath_1 UTF8String], NULL);    g_object_set (source2, "location", [filePath_2 UTF8String], NULL);        g_object_set (G_OBJECT (sink), "location", [filePath UTF8String], NULL);        if (!mpegenc || !avimux) {        GST_DEBUG("No Enc");    }    if (!sink) {        GST_DEBUG ("No Sink");    }        if (!decodebin1) {        GST_DEBUG ("No Decodebin");    }        /*    g_object_set(videobox1,"border-alpha",0,"top",0,"left",0,NULL);        gst_bin_add_many(GST_BIN (pipeline), source1, sink, videobox1, videomixer, clrspace1, clrspace2, clrspace, source2, mpegenc, avimux, decodebin1, decodebin2, nil);        gst_element_link_many(source1, decodebin1, clrspace1, videobox1, videomixer, clrspace, mpegenc, avimux, sink, nil);    gst_element_link_many(source2, decodebin2, clrspace2, videomixer, nil);    */    gst_bin_add_many(GST_BIN (pipeline), source1, sink,  clrspace1, mpegenc, avimux, decodebin1, queue, nil);        gst_element_link_many(source1, decodebin1, queue, clrspace1, mpegenc, avimux, sink, nil);        gst_element_set_state(pipeline, GST_STATE_PLAYING);    /****************************************************************************************************************************/    /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */    bus = gst_element_get_bus (pipeline);    bus_source = gst_bus_create_watch (bus);    g_source_set_callback (bus_source, (GSourceFunc) gst_bus_async_signal_func, NULL, NULL);    g_source_attach (bus_source, context);    g_source_unref (bus_source);    g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, (__bridge void *)self);    g_signal_connect (G_OBJECT (bus), "message::state-changed", (GCallback)state_changed_cb, (__bridge void *)self);    gst_object_unref (bus);        /* Create a GLib Main Loop and set it to run */    GST_DEBUG ("Entering main loop...");    main_loop = g_main_loop_new (context, FALSE);    g_main_loop_run (main_loop);    GST_DEBUG ("Exited main loop");    g_main_loop_unref (main_loop);    main_loop = NULL;        /* Free resources */    g_main_context_pop_thread_default(context);    g_main_context_unref (context);    gst_element_set_state (pipeline, GST_STATE_NULL);    gst_object_unref (pipeline);

Can you help me?My Xcode version is 7.2 and iOS version is 8.1 and 9.2.
Thanks 		 	   		  
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