% gdb --args mplayer movie.mp4                                                                                                                        
zsh: correct 'gdb' to '_gdb' [nyae]? n
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Reading symbols from mplayer...(no debugging symbols found)...done.
(gdb) start
Function "main" not defined.
Make breakpoint pending on future shared library load? (y or [n]) 
Starting program: /usr/bin/mplayer movie.mp4
Got object file from memory but can't read symbols: File truncated.
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
MPlayer SVN-r37285-snapshot (C) 2000-2014 MPlayer Team
210 audio & 441 video codecs
Loading extension-related profile 'vo.vdpau'

Playing movie.mp4.
libavformat version 56.4.101 (internal)
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO:  [H264]  1920x800  24bpp  23.976 fps  1769.1 kbps (216.0 kbyte/s)
Clip info:
 major_brand: isom
 minor_version: 1
 compatible_brands: isomavc1
 creation_time: 2012-01-27 18:12:16
Load subtitles in ./
SUB: Added subtitle file (1): ./movie.srt
Could not find a UTF-8 locale,
character keys beyond Latin-1 will not be handled.
[New Thread 0x7fffdc67e700 (LWP 7894)]
==========================================================================
Forced video codec: ffh264vdpau
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 56.1.100 (internal)
Selected video codec: [ffh264vdpau] vfm: ffmpeg (FFmpeg H.264 (VDPAU))
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, floatle, 64.0 kbit/2.08% (ratio: 8000->384000)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
[AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory
AO: [alsa] 48000Hz 2ch floatle (4 bytes per sample)
Starting playback...
Movie-Aspect is 2.40:1 - prescaling to correct movie aspect.
VO: [vdpau] 1920x800 => 1920x800 H.264 VDPAU acceleration 
Movie-Aspect is 2.40:1 - prescaling to correct movie aspect.
VO: [vdpau] 1920x800 => 1920x800 H.264 VDPAU acceleration 
r600_pipe.h:470:r600_emit_command_buffer: Assertion `cs->cdw + cb->num_dw <= (16 * 1024)' failed.

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00007fffdc8ead56 in _debug_assert_fail (expr=expr@entry=0x7fffdca244a8 "cs->cdw + cb->num_dw <= (16 * 1024)", file=file@entry=0x7fffdca24222 "r600_pipe.h", 
    line=line@entry=470, function=function@entry=0x7fffdca289b0 <__func__.10992> "r600_emit_command_buffer") at util/u_debug.c:309
309        os_abort();
(gdb) bt
#0  0x00007fffdc8ead56 in _debug_assert_fail (expr=expr@entry=0x7fffdca244a8 "cs->cdw + cb->num_dw <= (16 * 1024)", file=file@entry=0x7fffdca24222 "r600_pipe.h", 
    line=line@entry=470, function=function@entry=0x7fffdca289b0 <__func__.10992> "r600_emit_command_buffer") at util/u_debug.c:309
#1  0x00007fffdc8c3da7 in r600_emit_command_buffer (cb=<optimized out>, cb=<optimized out>, cs=<optimized out>, cs=<optimized out>) at r600_pipe.h:470
#2  0x00007fffdc9cf016 in r600_emit_command_buffer (cs=0x555556ebcad0, cs=0x555556ebcad0, cb=0x5555572fd518, cb=0x5555572fd518) at r600_state_common.c:67
#3  r600_emit_cso_state (rctx=<optimized out>, atom=<optimized out>) at r600_state_common.c:66
#4  0x00007fffdc9d1a46 in r600_emit_atom (atom=0x555557006760, rctx=0x555557005f20) at r600_pipe.h:479
#5  r600_draw_vbo (ctx=0x555557005f20, dinfo=<optimized out>) at r600_state_common.c:1420
#6  0x00007fffdc8f5e98 in util_draw_arrays (mode=0, start=0, count=1536, pipe=0x555557005f20) at ./util/u_draw.h:63
#7  util_blitter_clear_buffer (blitter=0x555556fed320, dst=dst@entry=0x555557002830, offset=offset@entry=0, size=size@entry=6144, num_channels=num_channels@entry=1, 
    clear_value=clear_value@entry=0x7fffffffbcf0) at util/u_blitter.c:2008
#8  0x00007fffdc9b0b26 in r600_clear_buffer (ctx=0x555557005f20, dst=0x555557002830, offset=0, size=6144, value=0) at r600_blit.c:556
#9  0x00007fffdc99ab3a in rvid_clear_buffer (context=0x555557005f20, buffer=<optimized out>) at radeon_video.c:125
#10 0x00007fffdc997c1b in ruvd_create_decoder (context=0x555557005f20, templ=<optimized out>, set_dtb=<optimized out>) at radeon_uvd.c:833
#11 0x00007fffdc8c5999 in vlVdpDecoderCreate (device=<optimized out>, profile=<optimized out>, width=1920, height=800, max_references=<optimized out>, 
    decoder=<optimized out>) at decode.c:121
#12 0x00005555556ddb54 in ?? ()
#13 0x00005555556ded08 in ?? ()
#14 0x00005555557daec1 in ?? ()
#15 0x0000555555c2fe44 in ?? ()
#16 0x00005555559e28c4 in ?? ()
#17 0x00005555559bfba8 in ?? ()
#18 0x0000555555bf9516 in ?? ()
#19 0x00005555557dba3d in ?? ()
#20 0x0000555555729746 in ?? ()
#21 0x00005555556a988c in ?? ()
#22 0x000055555569ca3f in ?? ()
#23 0x00007fffef1ee040 in __libc_start_main () from /usr/lib/libc.so.6
#24 0x000055555569ed69 in ?? ()
(gdb) quit