A Secret Weapon For OpenCV GStreamer VideoWriter write hangs in a Python multiprocessing Process

A Secret Weapon For OpenCV GStreamer VideoWriter write hangs in a Python multiprocessing Process

Blog Article

Click Here


When using cached implicit dependencies, sometimes you want to "start new" and have SCons re-scan the files for which it previously cached the dependencies. One example is, for those who have not too long ago installed a different version of external code that you employ for compilation, the external header files will have changed and the previously-cached implicit dependencies will be out of date.

scons: done building targets. Second, the contents of the DEFAULT_TARGETS list changes in response to calls towards the Default function, as you can see from the following SConstruct file:

env.Program('foo.c') In the event you want to make guaranteed that any specified paths are directories, so you would like the directory created if it doesn't already exist, use the PathVariable.PathIsDirCreate method given that the validation function:

using a service account JSON file. Service account IDs are usually not sensitive information and therefore their exposure

Linking foo SCons performs entire variable substitution on $*COMSTR variables, so they have access to all the common variables like $TARGET $SOURCES, etc., as well as any construction variables that happen for being configured in the construction environment used to build a specific concentrate on. Of course, sometimes It is really still important for being able to see the exact command that SCons will execute to build a focus on.

than a target file, the target file will not be rebuilt. This can happen if an aged copy of a source file is restored from a backup archive, for instance. The contents of the restored file will likely be different than they ended up the last time a dependent focus on was built, though the concentrate on won't be rebuilt because the modification time in the source file isn't more recent than the focus on.

Also, indentation issues while in the SConstruct and should only be used under specific situation which we will go over later.

cc -o foo foo.o A delicate reminder listed here: many of the commands for building come in pairs, depending on whether or not the intent will be to build an object for use in a shared library or not.

@VMT: sorry it was a typo in my instance: I used directly setMyObject() which would be the function within the slice.

Sometimes, you would like to generally be able to work with information from a subsidiary SConscript file in some way. Such as, suppose that you want to create 1 library from object files crafted by several subsidiary SConscript files. You can do this by using the Return function to return values from the subsidiary SConscript files on the calling file.

, an SCons function that you employ to instruct SCons about the "what" of your build. That's it. Now run the scons command to build the program. On a POSIX-compliant system like Linux or UNIX, you will see something like: % scons

/// - path: The custom path for the focus on. By default, the Swift Package Supervisor requires a focus on's sources to reside at predefined search paths;

Just permanently measure, here’s a working-but-small useSelector hook created from scratch that only triggers an update when its selected state changes:

/// - path: The custom path for the goal. By default, the Swift Package Supervisor requires a focus on's sources to reside at predefined search paths;