(gdb) bt full
#0  ff_emu_edge_vfix3_mmx.body_loop () at /build/libav-KCSjC9/libav-10.2/libavcodec/x86/videodsp.asm:333
No locals.
#1  0x00007fffd147cee8 in emulated_edge_mc (h_extend_var=<optimized out>, hfix_tbl=<optimized out>, v_extend_var=<optimized out>, vfix_tbl=<optimized out>, h=<optimized out>, w=32128, src_y=<optimized out>, src_x=<optimized out>, block_h=<optimized out>, block_w=<optimized out>, src_stride=<optimized out>, dst_stride=<optimized out>, src=0x7fffc29d5ffd "\200\200\200", dst=<optimized out>) at /build/libav-KCSjC9/libav-10.2/libavcodec/x86/videodsp_init.c:172
        start_x = 0
        end_y = 1
        start_y = 0
        end_x = 3
        p = 9
#2  emulated_edge_mc_sse2 (buf=0x7fffbc0689b0 "\200\200\200\200\200\177\177\200\200", src=0x7fffc29d5ffd "\200\200\200", buf_stride=304, src_stride=304, block_w=0, block_h=1, src_x=304, src_y=32128, w=304, h=128) at /build/libav-KCSjC9/libav-10.2/libavcodec/x86/videodsp_init.c:234
No locals.
#3  0x00007fffd12e3967 in mpeg_motion_internal (mb_y=15, is_mpeg12=0, h=16, motion_y=4, motion_x=22, pix_op=0x7fffcd50dc40, ref_picture=<optimized out>, field_select=0, bottom_field=0, field_based=0, dest_cr=0x7fffbc072320 "\200\201\201\200\200\177\177\200", dest_cb=0x7fffbc06fd20 "\200\200\177\177\177\177\177~", dest_y=0x7fffbc06d720 "BA?>;41,'\"\036\032\030\026\027\026", s=0x7fffcd50b8e0) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo_motion.c:332
        uvbuf = 0x7fffbc0689a0 "~\177\177\177\177\177\177\177\177"
        ptr_y = 0x7fffbc065ee0 "\024\025\024", '\025' <repeats 14 times>
        ptr_cr = <optimized out>
        dxy = 0
        src_y = 242
        mx = <optimized out>
        uvsrc_x = <optimized out>
        uvlinesize = 304
        linesize = 608
        ptr_cb = <optimized out>
        uvdxy = 1
        my = <optimized out>
        src_x = <optimized out>
        uvsrc_y = <optimized out>
        v_edge_pos = <optimized out>
#4  mpeg_motion (s=0x7fffcd50b8e0, dest_y=0x7fffbc06d720 "BA?>;41,'\"\036\032\030\026\027\026", dest_cb=0x7fffbc06fd20 "\200\200\177\177\177\177\177~", dest_cr=0x7fffbc072320 "\200\201\201\200\200\177\177\200", field_select=0, ref_picture=<optimized out>, pix_op=0x7fffcd50dc40, motion_x=22, motion_y=4, h=16, mb_y=15) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo_motion.c:383
No locals.
#5  0x00007fffd12e5386 in MPV_motion_internal (is_mpeg12=<optimized out>, qpix_op=<optimized out>, pix_op=<optimized out>, ref_picture=<optimized out>, dir=<optimized out>, dest_cr=<optimized out>, dest_cb=<optimized out>, dest_y=<optimized out>, s=<optimized out>) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo_motion.c:905
        i = <optimized out>
        mb_y = <optimized out>
#6  ff_MPV_motion (s=0x7fffcd50b8e0, dest_y=0x7fffbc06d720 "BA?>;41,'\"\036\032\030\026\027\026", dest_cb=0x7fffbc06fd20 "\200\200\177\177\177\177\177~", dest_cr=0x7fffbc072320 "\200\201\201\200\200\177\177\200", dir=<optimized out>, ref_picture=<optimized out>, pix_op=0x7fffcd50dc40, qpix_op=0x7fffcd50d7a8) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo_motion.c:976
No locals.
#7  0x00007fffd12d3091 in MPV_decode_mb_internal (is_mpeg12=<optimized out>, block=<optimized out>, s=<optimized out>) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo.c:2181
        dest_y = 0x7fffbc06d720 "BA?>;41,'\"\036\032\030\026\027\026"
        op_pix = 0x130
        op_qpix = 0x130
#8  ff_MPV_decode_mb (s=0x7fffcd50b8e0, block=0x7fffbc019d20) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo.c:2310
No locals.
#9  0x00007fffd1153af5 in decode_slice (s=s@entry=0x7fffcd50b8e0) at /build/libav-KCSjC9/libav-10.2/libavcodec/h263dec.c:238
        xy = <optimized out>
        ret = -2
        part_mask = 127
        ret = <optimized out>
#10 0x00007fffd11543b2 in ff_h263_decode_frame (avctx=0x7fffcd50afe0, data=0x7fffcd50b460, got_frame=0x7fffcb951d2c, avpkt=<optimized out>) at /build/libav-KCSjC9/libav-10.2/libavcodec/h263dec.c:568
        buf = 0x7fffcd512648 ""
        buf_size = 1476
        s = 0x7fffcd50b8e0
        ret = <optimized out>
        pict = 0x7fffcd50b460
#11 0x00007fffd137b1cb in avcodec_decode_video2 (avctx=avctx@entry=0x7fffcd50afe0, picture=0x7fffcd50b460, got_picture_ptr=got_picture_ptr@entry=0x7fffcb951d2c, avpkt=avpkt@entry=0x7fffcb951d30) at /build/libav-KCSjC9/libav-10.2/libavcodec/utils.c:1480
        avci = 0x7fffcd50f4e0
        ret = <optimized out>
#12 0x00007fffd1ea6d9b in DecodeVideo (p_dec=<optimized out>, pp_block=<optimized out>) at avcodec/video.c:610
        p_pic = <optimized out>
        pkt = {buf = 0x0, pts = 0, dts = 3949440001, data = 0x7fffcd512648 "", size = 1476, stream_index = 0, flags = 0, side_data = 0x0, side_data_elems = 0, duration = 0, destruct = 0x0, priv = 0x7fffb800cdb0, pos = -1, convergence_duration = 0}
        i_pts = <optimized out>
        i_used = <optimized out>
        b_gotpicture = 0
        i_display_date = <optimized out>
        p_sys = <optimized out>
        p_context = <optimized out>
        b_drawpicture = <optimized out>
        b_null_size = <optimized out>
        p_block = <optimized out>
#13 0x00007ffff7148c00 in DecoderDecodeVideo (p_dec=p_dec@entry=0x7fffcd4f9a88, p_block=p_block@entry=0x7fffcd5125c0) at input/decoder.c:1479
        p_owner = 0x7fffcd4f9e40
        p_pic = <optimized out>
        i_lost = 0
        i_decoded = 0
        i_displayed = 0
        p_input = <optimized out>
#14 0x00007ffff714a141 in DecoderProcessVideo (b_flush=false, p_block=0x7fffcd5125c0, p_dec=<optimized out>) at input/decoder.c:1841
        p_owner = 0x7fffcd4f9e40
#15 DecoderProcess (p_block=<optimized out>, p_dec=<optimized out>) at input/decoder.c:2014
        b_flush = false
        p_owner = 0x7fffcd4f9e40
        b_flush_request = <optimized out>
#16 DecoderThread (p_data=0x7fffcd4f9a88) at input/decoder.c:936
        canc = 0
        p_block = <optimized out>
        p_dec = 0x7fffcd4f9a88
        p_owner = 0x7fffcd4f9e40
#17 0x00007ffff79ac0ca in start_thread (arg=0x7fffcb952700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7fffcb952700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736608937728, 4435699075747043096, 1, 140737354125408, 140737338709872, 140736608937728, -4435671915462502632, -4435715799378536680}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#18 0x00007ffff74dd06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.