[FFmpeg-devel] [PATCH] avutil/file_open: avoid file handle inheritance on Windows

Tobias Rapp t.rapp at noa-archive.com
Fri Oct 30 11:30:40 CET 2015

On 29.10.2015 09:38, Tobias Rapp wrote:
> Attached patch fixes file lock issues in my Windows application when a
> child process is started with handle inheritance enabled (standard
> input/output redirection) while a FFmpeg transcoding is running in the
> parent process.
> BTW: It would be great if the patch could also be applied to the 2.7/2.8
> release branches.

Forgot to add links relevant to the subject.

[1] https://msdn.microsoft.com/en-us/library/w7sa2b22.aspx

Describes the _wsopen() function and the O_NOINHERIT flag. File handles 
opened by _wsopen() are inheritable by default.


Describes the CreateFile() function. Not directly relevant here, often 
used in cases outside of C/libc. Opens file without inheritance by 
default (lpSecurityAttributes is NULL).


Describes handle inheritance when creating new processes. Handle 
inheritance must be enabled (bInheritHandles = TRUE) e.g. when you want 
to pass handles for stdin/stdout via lpStartupInfo.


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