Subtitles will cause segmentation fault

[Daniel771]

Hi,

I'm using vlc 0.7.0 on Fedora Core 1.
I have a problem playing avi-files with subtitles. If I open a subtitle file, it causes a segmentation fault. I have no idea what would cause this. Videos play fine if I don't use subtitles.
I'll paste here some of the output from vlc.

[00000111] main module debug: using demux module "avi"
[00000200] main private debug: looking for subtitle demux module
[00000200] main private debug: probing 1 candidate
[00000113] main module debug: using subtitle demux module "demuxsub"
[00000200] demuxsub private debug: opened `/mnt/c/movie.srt'
[00000198] demuxsub input debug: detected SubRIP format
[00000200] demuxsub private debug: loaded 2183 subtitles
[00000198] main input: subtitle started
[00000198] main input debug: selecting ES 0x3
[00000201] main decoder debug: looking for decoder module
[00000201] main decoder debug: probing 17 candidates
[00000201] subsdec decoder debug: Using character encoding: ISO-8859-15
[00000097] main module debug: using decoder module "subsdec"
[00000201] main decoder debug: thread 145357744 (decoder) created at priority 0 (src/input/input_dec.c:166)
Segmentation fault

I'm playing movies from mounted ntfs partitions but I dont know if this has anything to do with this problem.

[The DJ]

If i happens exactly at the time the subtitle should be displayed then it looks like a crash caused by freetype (the text renderer).
Did you try running the avi by itself to make sure it's not something from the avi causing the crash?

[Daniel771]

Crash happens immediately I open avi with subtitles. It doesn't play at all.
If I disable subtitles, movie plays fine. I have tested this with several files with different types of subtitles with same result.

[The DJ]

Do you know about gdb?
If not, never mind. if so, i could use some output.
Not sure what the cause of this is though.

[Daniel771]

Well I'm not familiar with gdb and I don't know how to use it efficiently but I managed to get something out from it. But I doubt this doesn't help very much.

(gdb) run
Starting program: /usr/bin/vlc
(no debugging symbols found)...(no debugging symbols found)...[Thread debugging using libthread_db enabled]
[New Thread -1084908736 (LWP 6733)]
(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...VideoLAN Client 0.7.0 Bond
[New Thread 83385264 (LWP 6736)]
[New Thread 98364336 (LWP 6737)]
[New Thread 131808176 (LWP 6738)]
[00000198] main input: playlist item `/mnt/c/movie.avi'
[New Thread 145357744 (LWP 6754)]
[00000198] main input: subtitle started
[New Thread 1083993008 (LWP 6755)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 145357744 (LWP 6754)]
0x0805305c in ?? ()
(gdb)


My debugging skills are almost non-existing, so could you give me some hints how to get more verbose output?

[The DJ]

after that happens, try typing 'bt'
That's the output i need

[Daniel771]

Okay, here it is...

(gdb) run
Starting program: /usr/bin/vlc
(no debugging symbols found)...(no debugging symbols found)...[Thread debugging using libthread_db enabled]
[New Thread -1084503232 (LWP 11729)]
(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...VideoLAN Client 0.7.0 Bond
[New Thread 83385264 (LWP 11742)]
[New Thread 107207600 (LWP 11743)]
[New Thread 132025264 (LWP 11744)]
[00000198] main input: playlist item `/mnt/c/movie.avi'
[New Thread 1083939760 (LWP 11939)]
[00000198] main input: subtitle started
[New Thread 1094429616 (LWP 11946)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1083939760 (LWP 11939)]
0x0805305c in ?? ()
(gdb) bt
#0 0x0805305c in ?? ()
#1 0x00000004 in ?? ()
#2 0x00000005 in ?? ()
#3 0x09df4868 in ?? ()
#4 0x00000001 in ?? ()
(gdb)


Well, I hope this helps...

[The DJ]

Not really, it means everything got trashed.
I'm suspecting a problem with freetype. but what exactly is probably impossible to determine without direct access to the machine.
Maybe you should try to select a different font. The font might be broken.

[Gibalou]

I would rather say it means there is no debugging info in this VLC binary.