[MPlayer-users] Mplayer crashes when playing http streams from linvdr.

[Josef Wolf]

Hello!

Mplayer-20041015 frequently crashes when playing http streams from linvdr.

The crash is in decode.c:mpeg2_set_buf(). Looks like the NULL pointer
mpeg2dec->fbuf[1] is dereferenced. Any ideas what causes this problem
and what can be done about it?

Here is a gdb backtrace:

jw at raven:/m/spool/tmp/build-local> gdb --args mplayer -hardframedrop -ao oss:/dev/dsp1 http://vdr1:3000/PS/17
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This GDB was configured as "i586-suse-linux"...
(gdb) run
Starting program: /m/local/bin/mplayer -hardframedrop -ao oss:/dev/dsp1 http://vdr1:3000/PS/17
[New Thread 16384 (LWP 6367)]
Using GNU internationalization
Original domain: messages
Original dirname: /usr/share/locale
Current domain: mplayer
Current dirname: /usr/local/share/locale

MPlayer dev-CVS-041015-06:00-3.3.1 (C) 2000-2004 MPlayer Team

CPU: Advanced Micro Devices Athlon 4 /Athlon MP/XP Palomino (Family: 6, Stepping: 2)
Detected cache-line size is 64 bytes
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
Compiled with runtime CPU detection - WARNING - this is not optimal!
To get best performance, recompile MPlayer with --disable-runtime-cpudetection.
Reading config file /usr/local/etc/mplayer/mplayer.conf: Datei oder Verzeichnis nicht gefunden
Reading config file /home/jw/.mplayer/config: Ist kein Verzeichnis
Reading /home/jw/.mplayer/codecs.conf: Can't open '/home/jw/.mplayer/codecs.conf': Ist kein Verzeichnis
Reading /usr/local/etc/mplayer/codecs.conf: Can't open '/usr/local/etc/mplayer/codecs.conf': Datei oder Verzeichnis nicht gefunden
Using built-in default codecs.conf.
font: can't open file: /home/jw/.mplayer/font/font.desc
Font /usr/local/share/mplayer/font/font.desc loaded successfully! (206 chars)
Failed to open /dev/rtc: Keine Berechtigung (it should be readable by the user.)
Using nanosleep() timing
Can't open input config file /home/jw/.mplayer/input.conf: Ist kein Verzeichnis
Can't open input config file /usr/local/etc/mplayer/input.conf: Datei oder Verzeichnis nicht gefunden
Falling back on default (hardcoded) input config
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: Keine Berechtigung
Failed to open LIRC support.
You will not be able to use your remote control.

Playing http://vdr1:3000/PS/17.
Resolving vdr1 for AF_INET6...
Couldn't resolve name for AF_INET6: vdr1
Resolving vdr1 for AF_INET...
Connecting to server vdr1[192.168.1.110]:3000 ...
Cache size set to 320 KBytes
Connected to server: vdr1
Cache fill:  0,00% (0 bytes)    MPEG-PS file format detected.
VIDEO:  MPEG2  720x576  (aspect 2)  25,000 fps  15000,0 kbps (1875,0 kbyte/s)
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
MP3lib: init layer2&3 finished, tables done
AUDIO: 48000 Hz, 2 ch, 16 bit (0x10), ratio: 24000->192000 (192,0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
vo: X11 running at 1280x1024 with depth 24 and 32 bpp (":0" => local display)
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred csp: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG 1 or 2 (libmpeg2))
==========================================================================
Checking audio filter chain for 48000Hz/2ch/16bit -> 48000Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 48000 hz, little endian signed int
AF_pre: 48000Hz 2ch Signed 16-bit (Little-Endian)
AO: [oss] 48000Hz 2ch Signed 16-bit (Little-Endian) (2 bps)
Building audio filter chain for 48000Hz/2ch/16bit -> 48000Hz/2ch/16bit...
Starting playback...
VDec: vo config request - 720 x 576 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1,33:1 - prescaling to correct movie aspect.
VO: [xv] 720x576 => 768x576 Planar YV12
A:14024,2 V:14025,1 A-V: -0,924 ct: -0,004    2/  2   0%  0%  0,0% 2 0 3%%
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 6367)]
0x08413a19 in mpeg2_set_buf (mpeg2dec=0x86a1740, buf=0x86854d8, id=0x86854b8) at decode.c:355
355         if (mpeg2dec->custom_fbuf && !mpeg2dec->fbuf[1]->buf[0]){
(gdb) bt
#0  0x08413a19 in mpeg2_set_buf (mpeg2dec=0x86a1740, buf=0x86854d8, id=0x86854b8) at decode.c:355
#1  0x080ffde3 in decode (sh=0x8683e40, data=0x40e78008, len=4950, flags=0) at vd_libmpeg2.c:167
#2  0x080fdcd3 in decode_video (sh_video=0x8683e40, start=0x86854b8 "", in_size=141055160, drop_frame=0) at dec_video.c:309
#3  0x0807d2e1 in main (argc=5, argv=0xbffff234) at mplayer.c:2138
(gdb) print mpeg2dec->fbuf
$1 = {0x86a5b90, 0x0, 0x86a5b80}
(gdb)

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-- Josef Wolf -- jw at raven.inka.de --