segmentation fault when streaming

[Tommy]

When trying to set VLC to stream, it segfaulted.

This happens with all forms of streaming and on video and audio files, DVD, etc

No error message, no nothing.

[Loic Pefferkorn (loic)]

Can you please provide a backtrace ?

First, install gdb.
In a terminal (gnome-terminal or konsole), type the followings commands:

gdb /usr/bin/vlc
type r
Do steps involving the segfault
you should have messages on gdb
type bt

Then post the result here, with the ubuntu and videolan versions.

[Tommy (tommy-thetsui)]

G'day Loic

See below for bt
(gdb) bt
#0 0x080dae95 in ?? ()
#1 0x08759a98 in ?? ()
#2 0x0836f4a0 in _IO_stdin_used ()
#3 0xb496ce8c in ?? ()
#4 0x00000000 in ?? ()
#5 0xb7d7d900 in __malloc_initialize_hook () from /lib/tls/i686/cmov/libc.so.6
#6 0x00000000 in ?? ()
#7 0x80000000 in ?? ()
#8 0x00000002 in ?? ()
#9 0x00000050 in ?? ()
#10 0xb7ec1e97 in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
Previous frame inner to this frame (corrupt stack?)

Version:

ubuntu: 5.10
Videolan: VLC media player 0.8.4-svn20040920 Janus

ta.

Tommy

[Tommy (tommy-thetsui)]

Hi .. does anyone has any update.

I am guessing it has something to do with trying to thread ??

[Tommy (tommy-thetsui)]

Hi .. Does anyone has any updae? Anything else I could try? - Tommy

[ischwore (ischwore)]

I am having the exact same problem.

After running gdb:
#0 0x080dae95 in ?? ()
#1 0x086b0c38 in ?? ()
#2 0x0836f4a0 in _IO_stdin_used ()
#3 0xb4a6ee6c in ?? ()
#4 0x00000000 in ?? ()
#5 0xb7db4900 in __malloc_initialize_hook () from /lib/tls/i686/cmov/libc.so.6
#6 0x00000000 in ?? ()
#7 0x00000004 in ?? ()
#8 0x00000003 in ?? ()
#9 0x00000010 in ?? ()
#10 0xb7ef8e97 in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
Previous frame inner to this frame (corrupt stack?)

---------------------------------------------------------------------

I am also running:

ubuntu 5.10
Videolan: VLC media player 0.8.4-svn20040920 Janus

The command I ran to generate this seg fault:

vlc v4l:/dev/video0 --ipv6 --sout '#transcode{vcodec=mp4v,vb=1024,scale=1}:std{access=udp,mux=ts,url=[ff05::15]}' --ttl 12

worked fine for a previous version of ubuntu and vlc:

ubuntu 5.04
Videolan: VLC media Player 0.8.1-1ubuntu7

Even when I use the vlc GUI I am unable to stream anything and vlc immediately crashes. I have tried reinstalling serveral times.

Any suggestions would be much appreciated.

[Daniel T Chen (crimsun)]

Fixed in Dapper.

[Tommy (tommy-thetsui)]

Do you think you could provide reference to this bug, so I could fix it myself rather than wait for Dapper?

- Tommy

[Daniel T Chen (crimsun)]

It's either https://trac.videolan.org/vlc/changeset/12822 or https://trac.videolan.org/vlc/changeset/12981; I don't remember offhand which one I merged back before I pulled the snapshot.