The VideoLAN Forums

Posted: **21 Sep 2012 11:47**

Hi,

I upgraded to iOS 6 yesteday. Due to bug (I don't know if its in the OS or in libVLC) the MobileVLC app constantly crashes after closing the movie view to return to the library view.
The crash appears while calling

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release_input_thread( p_mi, true );

in

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libvlc_media_player_stop();

Here is the log:

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[0x1692f18] main input debug: control type=0
[0x1692f18] main input debug: control: stopping input
[0x1954c98] main decoder warning: can't get output picture
[0x1954c98] avcodec decoder warning: disabling direct rendering
[0x1954c98] main decoder warning: can't get output picture
[0x1954c98] main decoder debug: removing module "avcodec"
[0x1954c98] avcodec decoder debug: ffmpeg codec (MS MPEG-4 Video v2) stopped
[0x1954c98] main decoder debug: killing decoder fourcc `DIV2', 10 PES in FIFO
[0x1691f68] main generic debug: saving a free vout
[0x1691f68] main generic debug: reusing provided vout
[0x195ac98] main decoder debug: removing module "mpeg_audio"
[0x195ac98] main decoder debug: killing decoder fourcc `mpga', 0 PES in FIFO

LibVLC fatal error destroying condition (16) in thread 44068864 at /Volumes/Data/VLC/MobileVLC/ImportedSources/vlc/src/posix/thread.c:375 in vlc_cond_destroy
0   VLC                                 
0x00645f27 vlc_trace + 781   VLC
0x0064610b vlc_thread_fatal + 1222   VLC
0x006463b3 vlc_cond_destroy + 823   VLC
0x0063026f block_FifoRelease + 304   VLC
0x005ef3a1 DeleteDecoder + 965   VLC
0x005ef155 input_DecoderDelete + 2126   VLC
0x005f6c97 EsDestroyDecoder + 387   VLC
0x005f66b9 EsUnselect + 3528   VLC
0x005f5279 EsOutControlLocked + 7449   VLC
0x005f4a9d EsOutControl + 3610  VLC
0x005fc60b es_out_vaControl + 3411  VLC
0x005fb35f es_out_Control + 3812  VLC
0x005fb1cb CmdExecuteControl + 14213  VLC
0x005faa43 ControlLocked + 25014  VLC
0x005fa787 Control + 4215  VLC
0x005ff9bf es_out_vaControl + 3416  VLC
0x005ff98f es_out_Control + 3817  VLC
0x005ff7bb es_out_SetMode + 2218  VLC
0x005fedeb End + 4219  VLC
0x005ff1c5 Run + 56
(lldb)

Does anybody know how to fix this?

Posted: **21 Sep 2012 14:08**

This is a bug in the iOS 6 runtime. There is no way for you to fix it.

Posted: **21 Sep 2012 17:25**

Thanks four your quick answer. Did you already file a radar? Or can you explain that Bug so I can file a radar?

Posted: **22 Sep 2012 14:13**

This is a pthread issue in the current Darwin releases which also affects OS X Mountain Lion. We are escalating this matter through DTS at the moment.

Posted: **28 Sep 2012 05:28**

Hi

I have the same issue for this.
In IOS 6, libVLC will crash in pthread. "vlc_cond_destroy" or "vlc_mutex_unlock" in pthread.c.
Do you have patch for this?
So I can build the lib for myself.

I find in "http://www.videolan.org/", but I can't find the update for this issue.
This is the first time for me to come here, if anything is not allowed, please let me know.

Thanks for your great help!!!

Posted: **28 Sep 2012 10:26**

No, I don't have a patch for this.

Posted: **28 Sep 2012 10:50**

Hi

Can I modify the source code of IOS to fix it?
If yes, how can I do it by myself?
Can you tell me some hint for it?
Thanks a lot!!!

Posted: **28 Sep 2012 11:02**

iOS is a closed source operating system with an open source core. So, in theory, it's editable. However, I have not heard of any successful reports.

Posted: **28 Sep 2012 11:12**

Hi

Sorry, I mean "VLC-iOS-1.1.0-sources".
Can you tell me some hint for this issue and I can modify it by myself?
Or where can I find the solution?
I find in web, it has libVLC 2.0.4 in nightly build.
Is there solution in it?
Thanks a lot!!!

Posted: **28 Sep 2012 11:17**

No, if I had a patch for this, I'd be glad. Since I don't, I can't provide guidance how to fix it since if I had an idea about it, I'd fix it myself in the first place. As said earlier, this is a bug in the OS and should and will be fixed by Apple sooner or later.

Posted: **18 Oct 2012 09:12**

I have the same problems with libVLC(VLC-iOS-1.1.0-sources).
In IOS 6, libVLC works very unstable and often crashes.

As I know, there are many projects based on this libVLC for IOS and they updated their builds for IOS 6 and now work well.

Does anyone have any solution to this problem?
It is very important for me, I can pay money for a solution.

Posted: **18 Oct 2012 10:29**

These projects mostly violate VLC's license by not releasing the source code and hence don't contribute their changes back. According to VLC's license, its your right (if you are a customer of the other apps) to ask for the source code and check for their modifications to make it work.

Posted: **30 Oct 2012 10:02**

I have the same issue for this.How can fix this problem ? thank very much!

Posted: **20 Nov 2012 09:27**

I have a suggest，do not use the pause method,only use the stop method.

Posted: **30 Dec 2012 11:33**

This is caused by VLC_THREAD_ASSERT ("destroying condition"); in /vlc/src/misc/pthread.c:302 . I guess this ASSERT is only for debugging, so I can comment it first and wait until this bug fixed by Apple in the coming newer iOS version....(correct me if I am wrong)

in /vlc/src/misc/pthread.c:302...
//VLC_THREAD_ASSERT ("destroying condition");

I have tested in iOS5.1 and iOS6.0, there is no crashes now..

Posted: **24 Jan 2013 03:31**

I have the same problems.What can I do to fix this ?

Posted: **28 Jan 2013 18:51**

Follow the guidance provided by PATT.

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