android - FFmpeg exit value = 4 -


i try run ffmpeg command on android devices. on of them code below works excellent , video created. on some(e.g. motorola xoom) exit value 4. , while debugging on samsung galaxy s 2.3.3 frozes on process.waitfor(); me please? can't understand wrong.

public void execffmpeg(){     try {         file resultfile = new file(mcontext.getfilesdir() + "/ffmpeg");         string[] command = null;         command = new string[] {             resultfile.getabsolutepath(),             "-shortest",             "-i",             audiopath,             "-loop",             "1",             "-i",             imagepath, "-acodec", "ac3", "-ab", "128k", "-vcodec",             "mpeg4", videofilename };           if(command != null){             process process = runtime.getruntime().exec(command);             process.waitfor();             dumpstream(process.getinputstream());             dumpstream(process.geterrorstream());             mlogger.error("" + process.exitvalue());              if(process.exitvalue() == 0){             }              }         }     } catch (ioexception e) {         e.printstacktrace();     } catch (interruptedexception e) {         e.printstacktrace();     } }


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