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• Processing3 get "Error=2 No such file or directory" with a file that actually doesn't exist at the first place

  29 octobre 2016, par Tuang Pingfavilunda

  I cannot figure it out what happen to my Processing file. I am trying to use VideoExport library and my Macbook Pro cannot play it, but the Mac-mini is able to do so.

  Before the error happened it is another error=13 permission denied thing, so I messed in the terminal for a while with chmod 777 and finding the file with ls. I don’t know if that may be the reason that caused this happen. FYI, I also installed ffmpeg already.

  And this is the full error :

      java.io.IOException: Cannot run program "/Users/Tuang/Desktop/DMA_WORKS/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde": error=2, No such file or directory
  
      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 Basic.draw(Basic.java:32)
  
      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=2, No such file or directory
  
      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 /Users/Tuang/Desktop/DMA_WORKS/Work1_Facial_Muscles/Camera_Recorder/Basic/basic.mp4.txt for more details.
  
  Could not run the sketch (Target VM failed to initialize).
  
  For more information, read revisions.txt and Help → Troubleshooting.
  
  </init>

  ---

  1) The java.io.IOException : trying to call "/Work1_Facial Muscles/Cam_Rec/sketch_161027a/sketch_161027a.pde" which doesn’t exist for real. It is gone for a long time but seems like the program stuck here.

  2) "basic" is a file name from the Example of the Library. I just use it to test. Surprisingly, Every files that have been saved and changed the name still get the java.io.IOException’s error of the missing sketch_161027a.pde file.

  ---

  What I have done :
  1 I have already done the Homebrew thing to install ffmpeg.
  2 I deleted everything of Processing and reinstall it again.

  Any suggestion ?

• Trying to use the arcade library on Python3 with Debian 10 errors with pyglet_ffmpeg

  30 mars 2020, par Colin

  I’ve been trying to use the arcade library this morning with python3 but keep getting nothing but errors.

  My environment is Debian 10 (buster)

  I checked first to ensure I have python 3 installed, this confirmed as Python 3.7.3

  I double checked (according to the arcade library website arcade linux installation instructions and ran the install for python3 to make sure that pip and the required libraries were installed.

  I then ran the command to install the library

  sudo pip3 install arcade

  And to test it, copied and pasted the happy_face.py example. However when I tried to run it I got a slew of errors. This seems to be directly related to the arcade installation and if I just run a python script (test.py) with just one line

  import arcade

  At the terminal with

  python3 test.py

  I get the following errors

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavcodec.so.58.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavformat.so.58.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libswresample.so.3.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavfilter.so.7.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavutil.so.56.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libswscale.so.5.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavcodec.so.58.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavformat.so.58.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libswresample.so.3.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavfilter.so.7.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libavutil.so.56.*

  Unable to find match for ffmpeg sound library at expected location :
  /usr/local/lib64/python3.7/dist-packages/pyglet_ffmpeg2/linux_x86_64/libswscale.so.5.*

  I have used the following terminal command to identify the version of OpenGL installed

  glxinfo | grep "OpenGL version"

  Which returned

  OpenGL version string : 3.3 (Compatibility Profile) Mesa 18.3.6

  I have also tried the terminal command

  sudo pip3 install pyglet-ffmpeg

  Which returns

  Requirement already satisfied : pyglet-ffmpeg in
  /usr/local/lib/python3.7/dist-packages (0.1.4)

  Requirement already satisfied : pyglet>=1.4.0a1 in
  /usr/local/lib/python3.7/dist-packages (from pyglet-ffmpeg) (1.5.0)

  Requirement already satisfied : future in
  /usr/local/lib/python3.7/dist-packages (from
  pyglet>=1.4.0a1->pyglet-ffmpeg) (0.18.2)

  Any assistance would be appreciated. I’ve tried to be as concise as I can, but if more information is required, I’ll gladly supply it.

• FFMPEG - changing pixel format from 24-bit RGB to 8-bit Grayscale only changes color, but not file size

  27 septembre 2018, par Minjun Seong

  I am using the avlib* libraries and currently using the sws_getContext function to change pixel format from RGB (AV_PIX_FMT_RGB24) to grayscale (AV_PIX_FMT_GRAY8). The expected behavior should have been that the output file size should have decreased by 3 times as we are going from 24 bit rgb to 8 bit grayscale, but it stayed the same. Furthermore, when I checked on Media-Coder to see the format, the video format was still RGB. Any ideas on why the file size didn’t change and why the file format is still RGB ?

  Note : the video DID change to black and white as expected.