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• Issue #3 when compiling Xuggler for Raspberry pi with liboil

  19 juillet 2014, par Ashish Sharma

  I am trying to compile Xuggler for Raspberry Pi(Running on Debian OS aka Raspbian),

  I followed the ’Basic Build Instructions’ available here for compiling Xuggler.

  After I successfully installed all the prerequisites and set the correct paths, I ran the following command :

  ant run-tests

  After sometime I am facing the following error and the ant build fails :

  scroll at the end of log to see the issue

      Incarcerated package configured: ../../../../../captive/liboil
  
  Incarcerating package ../../../../../captive/liboil to fake DESTDIR=/home/pi/Downloads/xuggle-xuggler/build/native/armv6l-unknown-linux-gnueabihf/captive/stage
  
  /bin/bash: -c: line 1: syntax error near unexpected token `;'
  
  /bin/bash: -c: line 1: `          case armv6l-unknown-linux-gnueabihf in; *mingw*|*cygwin*) export as_cv_unaligned_access=yes ;; esac \'
  
  make: *** [all-local] Error 1

  I tried correcting the mentioned shell script but to no avail,

  Please help, following is the shell script code :

  if [ "" = "1" ]; then
  
    CROSS="--host ${HOST_OS}"
  
    # needed for mingw32 cross-compile to work
  
    case $HOST_OS in
  
       *mingw*|*cygwin*)
  
      export as_cv_unaligned_access=yes
  
      ;;
  
    esac
  
  else
  
    CROSS=
  
  fi

• Combining audio file and image with ffmpeg in python

  6 octobre 2018, par Liam

  tl ;dr : how to use a bash ffmpeg command in python

  So I’m trying to take one JPEG image and an audio file as input and generate a video file of the same duration as the audio file (by stretching the still image for the whole duration).

  So, I found these :
  https://superuser.com/questions/1041816/combine-one-image-one-audio-file-to-make-one-video-using-ffmpeg

  So, I now have the code for the merging :
  ffmpeg -loop 1 -i image.jpg -i audio.wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest out.mp4

  Then I want to use that in python but unable to figure out how to port this to ffmpeg-python or ffpy.

  I found this : Combining an audio file with video file in python

  So, I tried the same thing as him :

  cmd = 'ffmpeg -loop 1 -i image.jpg -i message.mp3 -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest out.mp4'
  
  subprocess.check_output(cmd, shell=True) 
  
  subprocess.call(cmd, shell=True)

  But I got "returned non-zero exit status 1". So what did I do wrong ?

• ffmpeg output to framebuffer (fbdev) Raspberry Pi 4

  30 mars 2022, par Alex Beavren

  I have been trying to play a video on the frame buffer with ffmpeg. In theory this

  


  ffmpeg -i /dev/video0 -pix_fmt bgra -f fbdev /dev/fb0


  


  I get errors like

  


  [fbdev @ 0xfcb380] Pixel format bgra is not supported, use rgb565le
av_interleaved_write_frame(): Invalid argument


  


  or
Interlace errors when I use rgb565le.

  


  Confusingly when I try to read from the framebuffer, I get a screenshot of incorrect resolution which looks like a blank tty.

  


  sudo ffmpeg -f fbdev -framerate 1 -i /dev/fb0 -frames:v 1 screenAA3.jpeg


  


  I am running on a RPi4 with latest buster build. I have had issues with graphical packages not working with the post vulkan driver, could that be the issue ?