[vdr] Problem with streamdev-cvs and subtitles - workaround

Anssi Hannula anssi.hannula at gmail.com
Thu Jul 28 20:59:27 CEST 2005

Anssi Hannula wrote:
> Anssi Hannula wrote:
>> Anssi Hannula wrote:
>>> Is anyone using subtitles (with subtitles-plugin) successfully in a 
>>> streamdev-cvs client?
>>> When I switch to any channel (subtitles or not), the video may stay 
>>> black, and jnettop confirms that no data is sent to the client. Same 
>>> thing happens with either dxr3 or xine as client's frontend. The 
>>> client is is running in the same host as the server. I suspect some 
>>> race condition in the plugin.
>> I managed to work around this problem with the attached patch 
>> (Apparently CmdTUNE deletes and recreates m_LiveStreamer, but nobody 
>> starts it again). I don't know if the patch has any side effects. 
>> Maybe streamdev's maintainer can see what's the problem and make a 
>> proper fix.
> And I'm unable to get the dxr3 plugin working with this at all. Server 
> always crashes.
> I'll try to put some mutex locking to the streamdev classes, if I can 
> figure out how they work ;)

Well, the problem indeed is in the order of OpenDvr, Set/Add/DelPid, and 
SetChannelDevice. When using subtitles plugin those differ. Also, if I 
tried to insert additional CloseDvr(); OpenDvr(); into those other 
functions, so that it would be executed as the last command, the server 
segfaults with a crapped backtrace.

Cut from the backtrace:
#2336 0x66a58f41 in ?? ()
#2337 0x354ba17e in ?? ()
#2338 0xe224fb44 in ?? ()
#2339 0xe19edc01 in ?? ()
#2340 0x05fd481f in ?? ()
#2341 0x714c71af in ?? ()

Anssi Hannula

More information about the vdr mailing list