[gstreamer-bugs] [Bug 551584] New: Crash when modifying the videobox "top" and "left" live while pipe is running

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: 0.10.18
           Summary: Crash when modifying the videobox "top" and "left" live
                    while pipe is running
           Product: GStreamer
           Version: 0.10.18
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: patrick.balleux at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: 2.21/2.22
   GNOME milestone: Unspecified


I was trying to move a small video stream over a bigger video stream using
videomixer and videobox to have a moving feed over the main video.

But when moving the small video feed (even if I pause and then play...), the
whole process crash.

I was able to move from left to right If I added a border at the right using
"right=-200" (or any value...) giving a space to move into but doing the same
thing with "bottom" to move down does not work at all.

Note, moving from right to left or bottom to top seem to work... 

Here is a small source code that reproduce this behaviour:


///////////// Start of source code /////////////////

#include <gst/gst.h>
#include <gst/gstelement.h>
#include <gst/gstelementfactory.h>
#include <gst/gstpipeline.h>
#include <gst/gstbin.h>
#include <gst/gstcaps.h>
#include <gst/gstutils.h>
#include <glib.h>

#include <stdio.h>
#include <stdlib.h>
#include <err.h>
static gboolean incr_top_border(gpointer data);
static int border;
/*
 * 
 */
int
main(int argc, char* argv[]) {
    GstElement* pipeline;
    GstElement* videosrc;
    GstElement* videofilter;
    GstElement* videobox;
    GstElement* videosink;    
    GstCaps* caps;
    GMainLoop* loop;
    int border;

    gst_init(&argc, &argv);
    loop = g_main_loop_new (NULL, FALSE);

    pipeline = gst_pipeline_new("Crash");
    videosrc = gst_element_factory_make("videotestsrc", "src");
    videofilter = gst_element_factory_make("capsfilter", "filter");
    videobox = gst_element_factory_make("videobox", "videobox");
    videosink = gst_element_factory_make("fakesink", "sink");
    if (!videosrc || !videofilter || !videobox || !videosink) {
        err(1, "Failed to create one of the pipeline components");
    }

    caps = gst_caps_from_string("video/x-raw-yuv, width=720, height=576,
bpp=32, depth=32, framerate=25/1");
    if (!caps) {
        err(1, "Failed to create caps from string");
    }
    g_object_set(videofilter, "caps", caps, NULL);

    gst_bin_add_many(GST_BIN(pipeline), videosrc, videofilter, videobox,
videosink, NULL);
    gst_element_link_many(videosrc, videofilter, videobox, videosink, NULL);
    gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING);
    g_timeout_add(1000, incr_top_border, videobox);
    g_main_loop_run(loop);        

    puts("Exiting"); fflush(stdout);
    gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_NULL);
    gst_object_unref(GST_OBJECT(pipeline));
    return (EXIT_SUCCESS);
}
static gboolean
incr_top_border(gpointer data) {
    GstElement* videobox = (GstElement *) data;
    printf("Setting top=%d\n", 0 - border);
    fflush(stdout);
    g_object_set(videobox, "top", 0 - border, NULL);
    ++border;
}

/////////////////// END of source code //////////////////////////


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