tbart@blackknight /var/tmp/portage/media-libs/mlt-0.4.4-r1/work/mlt-0.4.4/src/framework $ gdb kdenlive
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
(gdb) run
Starting program: /usr/bin/kdenlive
[Thread debugging using libthread_db enabled]
[New Thread 0xb646c700 (LWP 13194)]
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Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb32b2b90 (LWP 13211)]
mlt_frame_rescale_yuv422 (this=0x93dceb8, owidth=541, oheight=576) at mlt_frame.c:1079
1079                                    *out_ptr ++ = *( in_line + base );
Current language:  auto; currently c
(gdb) set pagination off
(gdb) info threads
  17 Thread 0xb3ab3b90 (LWP 13212)  0xb7f22424 in __kernel_vsyscall ()
* 16 Thread 0xb32b2b90 (LWP 13211)  mlt_frame_rescale_yuv422 (this=0x93dceb8, owidth=541, oheight=576) at mlt_frame.c:1079
  1 Thread 0xb646c700 (LWP 13194)  0xb74685f1 in QPersistentModelIndex::~QPersistentModelIndex () from /usr/lib/qt4/libQtCore.so.4
(gdb) bt
#0  mlt_frame_rescale_yuv422 (this=0x93dceb8, owidth=541, oheight=576) at mlt_frame.c:1079
#1  0xb4230bef in filter_scale (this=0x93dceb8, image=0xb32b234c, iformat=mlt_image_yuv422, oformat=mlt_image_yuv422, iwidth=720, iheight=575, owidth=541, oheight=576) at filter_rescale.c:45
#2  0xb42313af in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at filter_rescale.c:226
#3  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at mlt_frame.c:261
#4  0xb42316a5 in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_resize.c:121
#5  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#6  0xb7f1a33f in producer_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_tractor.c:274
#7  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#8  0xb4e6e9c6 in filter_get_image (this=0x932f868, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_avcolour_space.c:104
#9  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#10 0xb4e5947d in consumer_thread (arg=0x90421a0) at consumer_sdl_still.c:461
#11 0xb731615f in start_thread () from /lib/libpthread.so.0
#12 0xb6a16c0e in clone () from /lib/libc.so.6
(gdb) where full
#0  mlt_frame_rescale_yuv422 (this=0x93dceb8, owidth=541, oheight=576) at mlt_frame.c:1079
        output = (uint8_t *) 0xb2479028 "%\177K\201\001"
        out_line = (uint8_t *) 0xb2479028 "%\177K\201\001"
        in_middle = (uint8_t *) 0xb2164158 "�\201�\177�\200�}�~�{�\201�~\177zs\221su}\223\201q\200\225\200r~\227\200r}\230{p\200\227\207n\212\226\207o\202\225~p|\232{oz\231wot\231sou\230zn{\230zny\227unq\226mnk\226qoi\232cd_\225\223r�\206�\177�\177�\203�\204U\213H\203K\214QxX\206\200q�\177\202{m|H\207P|T\2030}D\201^}Z\203B{V\201^|X\202[~V\202X}X\202Y\177U\202G|0\201:wk\203uup\206_xV\206[|\\\202Y}]\201\\\177]\201]{^\201a|]\201V}R\201c}d\201f~d\201"...
        bottom = 18841536
        istride = 1440
        out_ptr = (uint8_t *) 0xb2479028 "%\177K\201\001"
        outer = 23549130
        dy = <value optimized out>
        in_line = (uint8_t *) 0xb20fed58 <Address 0xb20fed58 out of bounds>
        base = -720
        iwidth = <value optimized out>
        iheight = <value optimized out>
#1  0xb4230bef in filter_scale (this=0x93dceb8, image=0xb32b234c, iformat=mlt_image_yuv422, oformat=mlt_image_yuv422, iwidth=720, iheight=575, owidth=541, oheight=576) at filter_rescale.c:45
        interps = 0xb290bb60 "nearest"
#2  0xb42313af in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at filter_rescale.c:226
        iwidth = 720
        iheight = 575
        owidth = 541
        interps = 0xb290bb60 "nearest"
        filter_properties = <value optimized out>
#3  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at mlt_frame.c:261
        position = 844
        get_image = (mlt_get_image) 0xb4230e90 <filter_get_image>
        error = <value optimized out>
#4  0xb42316a5 in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_resize.c:121
        error = <value optimized out>
        aspect_ratio = 1.0666666666666667
        owidth = 541
        oheight = 576
        rescale = <value optimized out>
#5  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
        position = 844
        get_image = (mlt_get_image) 0xb4231530 <filter_get_image>
        error = <value optimized out>
#6  0xb7f1a33f in producer_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_tractor.c:274
        data = <value optimized out>
#7  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
        position = 844
        get_image = (mlt_get_image) 0xb7f1a1d0 <producer_get_image>
        error = <value optimized out>
#8  0xb4e6e9c6 in filter_get_image (this=0x932f868, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_avcolour_space.c:104
        forced = <value optimized out>
        error = 1245508640
#9  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
        position = 844
        get_image = (mlt_get_image) 0xb4e6e930 <filter_get_image>
        error = <value optimized out>
#10 0xb4e5947d in consumer_thread (arg=0x90421a0) at consumer_sdl_still.c:461
        frame = (mlt_frame) 0x932f868
        vfmt = mlt_image_rgb24a
        height = 576
        width = 720
        image = (uint8_t *) 0x0
        preview_off = 0
#11 0xb731615f in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#12 0xb6a16c0e in clone () from /lib/libc.so.6
No symbol table info available.
(gdb) thread apply all bt

Thread 17 (Thread 0xb3ab3b90 (LWP 13212)):
#0  0xb7f22424 in __kernel_vsyscall ()
#1  0xb7319c75 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb4e5875f in consumer_thread (arg=0x90334d0) at consumer_sdl_preview.c:381
#3  0xb731615f in start_thread () from /lib/libpthread.so.0
#4  0xb6a16c0e in clone () from /lib/libc.so.6

Thread 16 (Thread 0xb32b2b90 (LWP 13211)):
#0  mlt_frame_rescale_yuv422 (this=0x93dceb8, owidth=541, oheight=576) at mlt_frame.c:1079
#1  0xb4230bef in filter_scale (this=0x93dceb8, image=0xb32b234c, iformat=mlt_image_yuv422, oformat=mlt_image_yuv422, iwidth=720, iheight=575, owidth=541, oheight=576) at filter_rescale.c:45
#2  0xb42313af in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at filter_rescale.c:226
#3  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b1f9c, height=0xb32b1f98, writable=0) at mlt_frame.c:261
#4  0xb42316a5 in filter_get_image (this=0x93dceb8, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_resize.c:121
#5  0xb7f08813 in mlt_frame_get_image (this=0x93dceb8, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#6  0xb7f1a33f in producer_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_tractor.c:274
#7  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#8  0xb4e6e9c6 in filter_get_image (this=0x932f868, image=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at filter_avcolour_space.c:104
#9  0xb7f08813 in mlt_frame_get_image (this=0x932f868, buffer=0xb32b234c, format=0xb32b2358, width=0xb32b2350, height=0xb32b2354, writable=0) at mlt_frame.c:261
#10 0xb4e5947d in consumer_thread (arg=0x90421a0) at consumer_sdl_still.c:461
#11 0xb731615f in start_thread () from /lib/libpthread.so.0
#12 0xb6a16c0e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb646c700 (LWP 13194)):
#0  0xb74685f1 in QPersistentModelIndex::~QPersistentModelIndex () from /usr/lib/qt4/libQtCore.so.4
#1  0xb70eccb3 in QListView::isIndexHidden () from /usr/lib/qt4/libQtGui.so.4
#2  0xb70f0763 in QListView::rectForIndex () from /usr/lib/qt4/libQtGui.so.4
#3  0xb70f0906 in QListView::visualRect () from /usr/lib/qt4/libQtGui.so.4
#4  0xb70f1ae2 in QListView::paintEvent () from /usr/lib/qt4/libQtGui.so.4
#5  0xb6c26aee in QWidget::event () from /usr/lib/qt4/libQtGui.so.4
#6  0xb6fa11e4 in QFrame::event () from /usr/lib/qt4/libQtGui.so.4
#7  0xb7034197 in QAbstractScrollArea::viewportEvent () from /usr/lib/qt4/libQtGui.so.4
#8  0xb70d575f in QAbstractItemView::viewportEvent () from /usr/lib/qt4/libQtGui.so.4
#9  0xb7036685 in ?? () from /usr/lib/qt4/libQtGui.so.4
#10 0x091188c8 in ?? ()
#11 0xbfd3c6a4 in ?? ()
#12 0xbfd3c318 in ?? ()
#13 0xb746eba0 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/qt4/libQtCore.so.4
Backtrace stopped: frame did not save the PC
1079                                    *out_ptr ++ = *( in_line + base );
(gdb) list
1074                    // Loop for the entirety of our output row.
1075                    for ( dx = - outer; dx < outer; dx += scale_width )
1076                    {
1077                                    base = dx >> 15;
1078                                    base &= 0xfffffffe;
1079                                    *out_ptr ++ = *( in_line + base );
1080                                    base &= 0xfffffffc;
1081                                    *out_ptr ++ = *( in_line + base + 1 );
1082                                    dx += scale_width;