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POWindows media player crashes
 

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    <p>My WPF app seems to be crashing when I flip a media element around quickly. Debugging with WinDbg shows it as crashing with the following stack trace:</p> <pre><code>0:028:x86&gt; k 20 ChildEBP RetAddr 15aff648 07acb2a9 wmp!CMGSessionHost::GetPDFromTopologySourceNode0+0xb 15aff670 07a080fc wmp!CMGSessionHost::IsWindowsMediaContent+0x8a 15aff688 07acd838 wmp!CMGPlayer::HandleOnError+0x2b 15aff6d8 07c9270c wmp!CMGSessionHost::HandleTopologySet+0x583 15aff714 07c928b9 wmp!CMGSessionHost::OnDShowSourceCreated+0x82 15aff720 6e701f7b wmp!CMGSessionHost::OnDShowSourceCreatedAsyncCallback::Invoke+0x16 15aff730 6e701b3c MFPlat!CCompletionPort::InvokeCallback+0x12 15aff838 6e708cab MFPlat!CWorkQueue::CThread::ThreadMain+0xa5 15aff840 74e71287 MFPlat!CWorkQueue::CThread::ThreadFunc+0xd 15aff878 74e71328 msvcrt!_endthreadex+0x44 15aff880 76473677 msvcrt!_endthreadex+0xce 15aff88c 76f79d72 KERNEL32!BaseThreadInitThunk+0xe 15aff8cc 76f79d45 ntdll_76f40000!__RtlUserThreadStart+0x70 15aff8e4 00000000 ntdll_76f40000!_RtlUserThreadStart+0x1b 0:028:x86&gt; u 7a00881 wmp!CMGSessionHost::GetPDFromTopologySourceNode0: 07a00881 8bff mov edi,edi 07a00883 55 push ebp 07a00884 8bec mov ebp,esp 07a00886 83ec0c sub esp,0Ch 07a00889 8b4508 mov eax,dword ptr [ebp+8] 07a0088c 8b08 mov ecx,dword ptr [eax] 07a0088e 56 push esi 07a0088f 57 push edi 0:028:x86&gt; r eax=00000000 ebx=00000000 ecx=15aff668 edx=00010000 esi=00000000 edi=05c53460 eip=07a0088c esp=15aff63c ebp=15aff648 iopl=0 nv up ei pl nz ac pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010216 wmp!CMGSessionHost::GetPDFromTopologySourceNode0+0xb: 07a0088c 8b08 mov ecx,dword ptr [eax] ds:002b:00000000=???????? </code></pre> <p>Which to me looks like the callback from the interior of windows media player after it has opened the media is falling over with null pointer because I've changed the source too quickly.</p> <p>I am stopping the current video before I change over the source, however I'm wondering if I should wait until I've gotten back a MediaOpened event before I change the source again.</p> <p>Anyone else run into this and if so how did they fix it?</p>
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