Process Builder proporciona un "No existe ese archivo o directorio" en Mac mientras Runtime() .exec() funciona bien

Question

Tengo una aplicación que se ejecuta en Playframework y necesita codificar algunos archivos de video. Utilicé "Process pr = Runtime.getRuntime(). Exec (execCode)" para esto (y funciona perfectamente), pero como necesito el flujo de salida y el flujo de error, estoy tratando de usar ProcessBuilder (como también se recomienda) .

Pero no puedo hacerlo funcionar (probar en una MacBook). ¿Hay una diferencia fundamental entre el método Runtime y ProcessBuilder?

Este es mi código para ProcessBuilder (exactamente el mismo código funciona cuando sustituido por Runtime.getRuntime exec()().)

String execCode = "/opt/local/bin/ffmpeg -i file [...]"; 
    ProcessBuilder pb = new ProcessBuilder(execCode); 
    pb.redirectErrorStream(true); 
    pb.directory(new File("/Users/[...]/data/")); 
    Process pr = pb.start(); 

Esta es la salida de la consola:

11:00:18,277 ERROR ~ There was a problem with with processing MediaFile[13] with error Error during coding process: Cannot run program "/opt/local/bin/ffmpeg -i /Users/[...]/data/media/1/1/test.mov [...] /Users/[...]/data/media/1/13/encoded.mp3" (in directory "/Users/[...]/data"): error=2, No such file or directory 
java.lang.Exception: Error during coding process: Cannot run program "/opt/local/bin/ffmpeg -i /Users/Luuk/Documents/Java/idoms-server/data/media/1/1/test.mov -y -f mpegts -acodec libmp3lame -ar 48000 -b:a 64000 -vn -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate -1 -bufsize -1 -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -g 30 -async 2 /Users/Luuk/Documents/Java/idoms-server/data/media/1/13/encoded.mp3" (in directory "/Users/Luuk/Documents/Java/idoms-server/data"): error=2, No such file or directory 
    at logic.server.MediaCoder.encodeMediaFile(MediaCoder.java:313) 
    at logic.server.MediaCoder.doJob(MediaCoder.java:54) 
    at play.jobs.Job.doJobWithResult(Job.java:50) 
    at play.jobs.Job.call(Job.java:146) 
    at play.jobs.Job$1.call(Job.java:66) 
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98) 
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:680) 
Caused by: java.io.IOException: Cannot run program "/opt/local/bin/ffmpeg -i /Users/Luuk/Documents/Java/idoms-server/data/media/1/1/test.mov -y -f mpegts -acodec libmp3lame -ar 48000 -b:a 64000 -vn -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate -1 -bufsize -1 -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -g 30 -async 2 /Users/Luuk/Documents/Java/idoms-server/data/media/1/13/encoded.mp3" (in directory "/Users/Luuk/Documents/Java/idoms-server/data"): error=2, No such file or directory 
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:460) 
    at logic.server.MediaCoder.encodeMediaFile(MediaCoder.java:189) 
    ... 11 more 
Caused by: java.io.IOException: error=2, No such file or directory 
    at java.lang.UNIXProcess.forkAndExec(Native Method) 
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:53) 
    at java.lang.ProcessImpl.start(ProcessImpl.java:91) 
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:453) 
    ... 12 more 

Answer 1

Usted necesitará especificar los argumentos como separado Strings:

new ProcessBuilder("cmd", "arg1", "arg2", ...); 

El constructor acepta String, varargs y List<String>.

Ver ProcessBuilder documentation.