Qt & Gstreamer on Windows crashes

[Matthew Waters]

Hi,

You don't need the qml plugin however that may be where your problem
lies.  I have also never used Qt Creator on Windows but used qmake manually.

Without more exact information on what combinations you have tried I
cannot help you other than what I've mentioned previously.  That you
need to get the compiler environment correct between GStreamer and Qt as
they may have different expectations for the runtime environment both
for C++ and C.

Look through dependency walker (or equivalent) for differing CRT, debug
vs release CRT, CRT version differences, C++ ABIs, C/C++ compiler
versions, MSVC vs GCC, 32-bit vs 64-bit libraries or application, PATH
environment variable setup, etc.

Cheers
-Matt

On 9/3/20 11:28 am, Daniel Johnson wrote:
> On Sat, Mar 7, 2020, 9:45 PM Matthew Waters <ystreet00 at gmail.com
> <mailto:ystreet00 at gmail.com>> wrote:
>
>     Assuming the issue is c++ abi differences between GStreamer and
>     Qt, you need to ensure that both Qt and GStreamer's qml plugin are
>     built against the same c++ abi.  This generally means the msvc c++
>     abi as Qt and GStreamer have/had different mingw compiler versions
>     with different c++ abis.
>
>
> Do I need the QML plugin at all? I was just going to use the xid, or
> HWND and video overlay. The Qt documentation seems to indicate that
> msvc isn't supported with the open source version of Qt Creator, so I
> wouldn't have thought it was compiled with msvc. 
>
> Is there a good way to figure out what something is compiled with
> using a tool that looks at the PE binaries? I'm not even sure I have
> 64 bit versions. I'd be happy to compile Gstreamer from source to
> match Qt, or vice versa or compile both. I just haven't figured out
> how to even diagnose the problem other than guess and check which has
> so far been very time consuming and unproductive. It never gets to the
> point that I can printf, or attach a debugger, but compiles without
> warnings. 
>
>
>
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> gstreamer-devel at lists.freedesktop.org
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