On 13/10/2025 06:53, Bruce Gavin via ffmpeg-user wrote:

  Win10 latest version and updates.
Running on ESXi 6.7 VMFull Version 8.0 from your download page.Spawning 
platform is Delphi 7 Enterprise.
I am willing to do any debug steps you require.

     On Sunday, October 12, 2025 at 09:21:07 PM PDT, Gyan Doshi via 
ffmpeg-user<[email protected]> wrote:
On 2025-10-13 05:09 am, Bruce Gavin via ffmpeg-user wrote:
I am attempting to spawn ffmpeg to do a simple integrity check on MP3 files.
I have a working process that spawns other EXE without problems.
I moved ffmpeg.exe from C:\Windows to C:\ and the error is the same.
I attempt to spawn ffmpeg.exe without any command parameters to get a help 
screen.
With or without parameters the access exception is the same.
Q:  What am I missing?

I guess the most relevant part when calling CreateProcess() is the STARTUPINFO structure. Do you clear the structure properly before setting its fields? How do you initialize the handles for standard output/error? See the official Win32 API documentation <https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessw> for reference.

Regards, Tobias
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