Crash while the stream goes to background

[rodrigo-flag]

I'm using v2.1.0 of the framework and implementing a two-way videochat. When the app goes to background (Home button pressed) it crashes with the following trace:

#1	0x000000019d2b91bc in ___lldb_unnamed_symbol545$$AGXGLDriver ()
#2	0x00000001987faf44 in gpusSubmitDataBuffers ()
#3	0x000000019d2ba77c in ___lldb_unnamed_symbol566$$AGXGLDriver ()
#4	0x000000019d2b5f74 in ___lldb_unnamed_symbol512$$AGXGLDriver ()
#5	0x000000019d2aef3c in ___lldb_unnamed_symbol317$$AGXGLDriver ()
#6	0x000000019da31fcc in glTexSubImage2D_Exec ()
#7	0x00000001007cef74 in tex_sub_image2D(__GLIContextRec*, unsigned int, int, int, int, int, int, unsigned int, unsigned int, void const*) ()
#8	0x000000018b315af8 in glTexSubImage2D ()
#9	0x00000001000b1a3c in on_draw_frame at /Users/infrared5/Documents/TeamCity/buildAgent/work/fd7584733d331e84/red5streaming/src/renderer.c:428
#10	0x00000001000a02e4 in ::-[R5VideoViewController update]() at /Users/infrared5/Documents/TeamCity/buildAgent/work/fd7584733d331e84/red5streaming/src/R5VideoViewController.mm:342
#11	0x00000001000a0920 in ::-[R5VideoViewController glkView:drawInRect:](GLKView *, CGRect) at /Users/infrared5/Documents/TeamCity/buildAgent/work/fd7584733d331e84/red5streaming/src/R5VideoViewController.mm:425
#12	0x0000000192e07934 in -[GLKView _display:] ()
#13	0x00000001000a012c in ::-[R5VideoViewController render:](NSTimer *) at /Users/infrared5/Documents/TeamCity/buildAgent/work/fd7584733d331e84/red5streaming/src/R5VideoViewController.mm:316
#14	0x00000001009efae4 in -[DYDisplayLinkInterposer forwardDisplayLinkCallback:] ()
#15	0x000000018bf1af24 in CA::Display::DisplayLinkItem::dispatch(unsigned long long) ()
#16	0x000000018bf1add0 in CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) ()
#17	0x0000000188f32094 in IODispatchCalloutFromCFMessage ()
#18	0x0000000188c5ae50 in __CFMachPortPerform ()
#19	0x0000000188c73218 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ ()
#20	0x0000000188c729cc in __CFRunLoopDoSource1 ()
#21	0x0000000188c704b0 in __CFRunLoopRun ()
#22	0x0000000188b9e2b8 in CFRunLoopRunSpecific ()
#23	0x000000018a652198 in GSEventRunModal ()
#24	0x000000018ebe57fc in -[UIApplication _run] ()
#25	0x000000018ebe0534 in UIApplicationMain ()
#26	0x000000010009c5e4 in main at 
#27	0x0000000187b815b8 in start ()

I try to pause the stream video setting pauseVideo property to YES when going to background and then resume it on foreground but I receive this other trace:

#0	0x00000001987f9f94 in gpus_ReturnNotPermittedKillClient ()
#1	0x000000019d2b91bc in ___lldb_unnamed_symbol545$$AGXGLDriver ()
#2	0x00000001987faf44 in gpusSubmitDataBuffers ()
#3	0x000000019d2ba77c in ___lldb_unnamed_symbol566$$AGXGLDriver ()
#4	0x000000019db03f9c in gliPresentViewES_Exec ()
#5	0x000000019db03e98 in gliPresentViewES ()
#6	0x000000018b31ac08 in -[EAGLContext presentRenderbuffer:] ()
#7	0x0000000100af201c in EAGLContext_presentRenderbuffer(EAGLContext*, objc_selector*, unsigned long) ()
#8	0x0000000192e07994 in -[GLKView _display:] ()
#9	0x0000000100227afc in ::-[R5VideoViewController render:](NSTimer *) at /Users/infrared5/Documents/TeamCity/buildAgent/work/fd7584733d331e84/red5streaming/src/R5VideoViewController.mm:316
#10	0x0000000101d1bae4 in -[DYDisplayLinkInterposer forwardDisplayLinkCallback:] ()
#11	0x000000018bf1af24 in CA::Display::DisplayLinkItem::dispatch(unsigned long long) ()
#12	0x000000018bf1add0 in CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) ()
#13	0x0000000188f32094 in IODispatchCalloutFromCFMessage ()
#14	0x0000000188c5ae50 in __CFMachPortPerform ()
#15	0x0000000188c73218 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ ()
#16	0x0000000188c729cc in __CFRunLoopDoSource1 ()
#17	0x0000000188c704b0 in __CFRunLoopRun ()
#18	0x0000000188b9e2b8 in CFRunLoopRunSpecific ()
#19	0x000000018a652198 in GSEventRunModal ()
#20	0x000000018ebe57fc in -[UIApplication _run] ()
#21	0x000000018ebe0534 in UIApplicationMain ()
#22	0x00000001000df85c in main at 
#23	0x0000000187b815b8 in start ()

I tried also to stop the videoCapture when going to background with [[self.stream getVideoSource] stopVideoCapture]; but that didn't work either.

What is the proper way to pause video when going to background, keeping the audio on, and then resume video on foreground?

[HoldenMills]

You may want to take a look at our blog post on dealing with iOS interruptions. If you have any problems with implementing that please let me know.

-Holden