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• FFMPEG Padding 1 pixel

  21 juillet 2022, par Rittari771

  I've been playing around with the values in my padding code, but cannot seem to get the paddings to match exactly 1:1.
If we look really closely, it is 1 pixel off from
left side,
but right side seems fine (1:1 with the violet padding)

  


  I did get the left side to match, but then the right side is bad... i cant find a point between where both are equal.

  


  What can i do to match them ? Here is my code :

  


  ffmpeg -i video1.mp4 -filter_complex "pad=iw*1.1:0:ow*0.5:0:violet,scale=1080x1270" -y video1_padded.mp4
ffmpeg -i video2.mp4 -filter_complex "pad=iw*1.1:0:ow*0.5:0:cyan,scale=1080x650" -y video2_padded.mp4
ffmpeg -i video1_padded.mp4 -i video2_padded.mp4 -filter_complex "vstack=inputs=2" -y finalproduct.mp4


  


• ffmpeg how to remove black borders when resizing an image

  3 juin 2021, par Mapg

  I am creating some thumbnails using FFmpeg and I see that some black borders are created when I resize them.

  


  I guess this is happening because the video source dimension doesn't match exactly the target dimension, so FFmpeg fills out the blank space with this black color.

  


  My question is ...

  


  Can I change this "black color" used by FFmpeg by default so I can match these extra borders added with the background of my application ?

  


  If this is not possible ...

  


  Can I convert these black borders to a transparent area so I can create a PNG to match my background which has a different color (a kind of light green)

  


  I have attached an example where you will see two black pixels height in the bottom zone of the picture.

  


  This is what I want to convert to transparent or being able to choose my own color.

  


  Any idea to solve this issue will be very helpful for me ?

  


  Thank you very much in advance !

  


  Mapg

  


  

  


• 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.