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• FFMPEG : Add a fixed size image on a video, regardless of the video width & height (resolution)

  11 mars 2017, par Drupalist

  This is my code that adds an image to videos, running via PHP :

  exec('ffmpeg -i input.mp4 -i logo.png -filter_complex 
  
  "[0:v][1:v] overlay=10:10"  -pix_fmt yuv420p -c:a copy output.mp4');

  It works well but the problem is, the image is scaled down or up, up on the video resolution. For example in the following images the logo width is 50px but videos resolution are different :

  

  and this one

  

  How can I prevent the image from scaling down/up ?

  ---

  Update

  Thanks to Mulvya, he proposed these codes

  ffmpeg -i input.mp4 -i logo.png -filter_complex 
  
  "[1:v][0:v]scale2ref=(W/H)*ih/8:ih/8[wm][base];[base][wm]overlay=10:10"
  
  -pix_fmt yuv420p -c:a copy output.mp4

  and

  ffmpeg -i input.mp4 -i logo.png -filter_complex 
  
  "[1:v][0:v]scale2ref=(W/H)*ih/8:ih/8[wm][base];[wm]setsar=1[wmsar];
  
  [base][wmsar]overlay=10:10"
  
  -pix_fmt yuv420p -c:a copy output.mp4

  that works very well, but it doesn’t keep the logo aspect ratio.
  I tried this code on two videos with different resolution and this is the result

  

  and this one

  

  Is it possible to improve this solution ?

• Revision 1c0769107b : vp10 cleanup : remove nonrd and real-time code Code cleanup. Change-Id : I668bd5

  26 août 2015, par Yunqing Wang

  Changed Paths :
   Modify /vp10/encoder/encodeframe.c

  
   Modify /vp10/encoder/encoder.c

  
   Modify /vp10/encoder/ethread.c

  
   Delete /vp10/encoder/pickmode.c

  
   Delete /vp10/encoder/pickmode.h

  
   Modify /vp10/encoder/ratectrl.c

  
   Modify /vp10/encoder/rd.c

  
   Modify /vp10/encoder/rdopt.c

  
   Modify /vp10/encoder/speed_features.c

  
   Modify /vp10/encoder/speed_features.h

  
   Modify /vp10/vp10cx.mk

  
  
  vp10 cleanup : remove nonrd and real-time code

  Code cleanup.

  Change-Id : I668bd5a4e5fbe96969d51d9ee777fc5f1d8abfe6

• If I pass this code in Windows console it works, but when I emulate windows console in node.js code doesn't work, and returns unclear error

  22 décembre 2016, par Maxim Cherevatov

  I have code :

  cmd.get(
  
      'trimp3  ant.mp3 ant2.mp3 00:00 00:20',
  
      function(data){
  
          console.log('the node-cmd cloned dir contains these files :\n\n',data)
  
      }
  
  );

  If pass this code in Windows console it works well !
  But, when i emulate windows console in node.js this code not work, and returns unclear mistake :

  [!!] ERROR:  "ffmpeg" �� ����� ����७��� ��� ���譥�
  
  ��������, �ᯮ��塞�� �ணࠬ��� ��� �������� 䠩���.

  To emulate the use node-cmd.