(gdb) bt
#0  ff_emu_edge_vfix3_mmx.body_loop () at /build/libav-KCSjC9/libav-10.2/libavcodec/x86/videodsp.asm:333
#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
#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
#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
#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
#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
#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
#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
#8  ff_MPV_decode_mb (s=0x7fffcd50b8e0, block=0x7fffbc019d20) at /build/libav-KCSjC9/libav-10.2/libavcodec/mpegvideo.c:2310
#9  0x00007fffd1153af5 in decode_slice (s=s@entry=0x7fffcd50b8e0) at /build/libav-KCSjC9/libav-10.2/libavcodec/h263dec.c:238
#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
#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
#12 0x00007fffd1ea6d9b in DecodeVideo (p_dec=<optimized out>, pp_block=<optimized out>) at avcodec/video.c:610
#13 0x00007ffff7148c00 in DecoderDecodeVideo (p_dec=p_dec@entry=0x7fffcd4f9a88, p_block=p_block@entry=0x7fffcd5125c0) at input/decoder.c:1479
#14 0x00007ffff714a141 in DecoderProcessVideo (b_flush=false, p_block=0x7fffcd5125c0, p_dec=<optimized out>) at input/decoder.c:1841
#15 DecoderProcess (p_block=<optimized out>, p_dec=<optimized out>) at input/decoder.c:2014
#16 DecoderThread (p_data=0x7fffcd4f9a88) at input/decoder.c:936
#17 0x00007ffff79ac0ca in start_thread (arg=0x7fffcb952700) at pthread_create.c:309
#18 0x00007ffff74dd06d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111