I recently ran into this problem and just wanted to mention that since java 7 the process builder api has been expanded. This problem can now be solved with: ProcessBuilder pb = new ProcessBuilder(“yourcommand”); pb.redirectOutput(Redirect.INHERIT); pb.redirectError(Redirect.INHERIT); Process p = pb.start();
If I’m not mistaken, the “ffmpeg-wrapper” project you linked to is out of date and not maintained. FFmpeg is a very active project, lot’s of changes and releases all the time. You should look at the Xuggler project, this provides a Java API for what you want to do, and they have tight integration with … Read more
You can use java.lang.Runtime.exec to run simple code. This gives you back a Process and you can read its standard output directly without having to temporarily store the output on disk. For example, here’s a complete program that will showcase how to do it: import java.io.BufferedReader; import java.io.InputStreamReader; public class testprog { public static void … Read more
There is no executable called cd, because it can’t be implemented in a separate process. The problem is that each process has its own current working directory and implementing cd as a separate process would only ever change that processes current working directory. In a Java program you can’t change your current working directory and … Read more
This is the solution but you have to set: echo 1 > /proc/sys/vm/overcommit_memory
The various overloads of Runtime.getRuntime().exec(…) take either an array of strings or a single string. The single-string overloads of exec() will tokenise the string into an array of arguments, before passing the string array onto one of the exec() overloads that takes a string array. The ProcessBuilder constructors, on the other hand, only take a … Read more
There are many reasons that waitFor() doesn’t return. But it usually boils down to the fact that the executed command doesn’t quit. This, again, can have many reasons. One common reason is that the process produces some output and you don’t read from the appropriate streams. This means that the process is blocked as soon … Read more
Write a script, and execute the script instead of separate commands. Pipe is a part of the shell, so you can also do something like this: String[] cmd = { “/bin/sh”, “-c”, “ls /etc | grep release” }; Process p = Runtime.getRuntime().exec(cmd);
Batch files are not an executable. They need an application to run them (i.e. cmd). On UNIX, the script file has shebang (#!) at the start of a file to specify the program that executes it. Double-clicking in Windows is performed by Windows Explorer. CreateProcess does not know anything about that. Runtime. getRuntime(). exec(“cmd /c … Read more
Runtime rt = Runtime.getRuntime(); Process pr = rt.exec(“java -jar map.jar time.rel test.txt debug”); http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html