Recherche avancée

Sur d’autres sites (9123)

• ffmpeg fade in animation and logo overlay in a single step

  24 octobre 2018, par Amin Baig

  I have the following commands to create a fade in effect with a series of images and then place a water mark png using the lut filter on the generated video :

  //Creating the fade in video :

  ffmpeg -t 5 -i 1.jpg -t 5 -i 2.jpg -t 5 -i 3.jpg -t 5 -i 4.jpg -i 5.jpg -filter_complex "[0:v]zoompan=z='min(zoom+0.0015,1.5)':d=125,fade=t=out:st=4:d=1[v0];[1:v]zoompan=z='min(zoom+0.0015,1.5)':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v1];[2:v]zoompan=z='min(zoom+0.0015,1.5)':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v2];[3:v]zoompan=z='min(zoom+0.0015,1.5)':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v3];[4:v]zoompan=z='min(zoom+0.0015,1.5)':d=125,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v4];[v0][v1][v2][v3][v4]concat=n=5:v=1:a=0,format=yuva444p[v]" -map "[v]" -s "480x600" -t 40 series_out_fade_v2_5images.mp4

  After the video is created I use the following command to place a water mark logo over it :

  //Water mark

  ffmpeg -y -i series_out_fade_v2_5images.mp4 -i optimaken_logo.png -filter_complex "[1]lut=a=val*0.5[a];[0][a]overlay=0:0" -c:v libx264 -an v4_output.mp4

  my questions are :

  1. How can I achieve both in a single command
     2. How do I scale overlay proportionally so that the height of the water mark is always 65 pixels and the width is scaled
        proportionally
     3. Explicitly tell where to place the logo to the top right corner with a padding of 10 pixels for both x and y

• Convert from webm to gif using FFMPEG with minimal loss in quality

  27 novembre 2017, par Neo Herakles

  so I want to convert all my webm files to gif but the quality degraded incredibly, there’s some barely visible lines along the picture, tried using crf to improve it but it doesn’t, could you help me ? Here’s my code :

  @echo off
  
  setlocal
  
  for %%G in ("%~dp0\webm\*.webm") do (
  
      ffmpeg -i "%%G" -pix_fmt rgb24 -crf 17 "%%G.gif"
  
      )
  
  )
  
  endlocal
  
  pause

  Also, could you instruct me in a way in which I can remove the .webm from the output filename ? it outputs as "(file name).webm.gif"

• Decrease size of video in android with minimal loss of quality

  26 mai 2023, par Koushik Roy

  I am recording video using camera intent and getting displaying it in a videiview. Now i want to upload it, But it is very big in size. I want to compress it using FFMPEG as I found the many article and in SO also, but i didn't find any clear article with codes.

  


  Can anyone help me with ffmpeg code ?
Is there any other way to do it in android ?
Thanks in advance.