How to change permission in terminal I cannot use VideoExport Library.

Hi guys,

I have a problem trying to use any of the code from the library of Video Export that they get the same error.

Even with the code from the website itself here > http://funprogramming.org/VideoExport-for-Processing/#examples ,

I also get error with permission thing.

say:

java.io.IOException: Cannot run program "/Users/Tuang/Desktop/DMA_WORKS/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde": error=13, Permission denied
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at com.hamoid.VideoExport.startFfmpeg(Unknown Source)
    at com.hamoid.VideoExport.initialize(Unknown Source)
    at com.hamoid.VideoExport.saveFrame(Unknown Source)
    at sketch_161027b.draw(sketch_161027b.java:51)
    at processing.core.PApplet.handleDraw(PApplet.java:2412)
    at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1540)
    at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:316)
Caused by: java.io.IOException: error=13, Permission denied
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
    at java.lang.ProcessImpl.start(ProcessImpl.java:134)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
    ... 7 more
VideoExport error: Ffmpeg failed. Study /var/folders/nq/xsfvm25d249181txfc2_c39c0000gn/T/untitled6197566133901091867sketches/sketch_161027b/camera.mp4.txt for more details.
Could not run the sketch (Target VM failed to initialize).
For more information, read revisions.txt and Help → Troubleshooting.

So I google

1) how to change permission -> which I found that my Mac cannot find the file it said there is no such file.

2) how to find a file in Mac with terminal -> later I found that it is about the space bar in a folder name, so I changed it.

Then, I was able to find a file and I guess I've already changed the permission with chmod 777, since I typed it in and has no error with finding the file thing. However, back to the Processing the same error still there.

3) Do I have FFmpeg ->Terminal said, it cann't find it so I download two versions and installed one but didn't work so try installed another, still didn't work.

Now.. I don't know what to do. Please help! The error still here.