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• FFmpeg apply multiple filters (Logo overlay, Brightness change and text overlay)

  4 octobre 2018, par A.Butakidis

  I am trying to add three filters to a png file using ffmpeg in Android (I am using the writing mind lib).

  So far I managed to pull together the cmd :

  -i /storage/emulated/0/videoApp/temp/firstFrameOfMergedVideo.png 
  
  
  
  -i /storage/emulated/0/videoApp/temp/logo.png
  
  
  
  -filter_complex

  FIRST FILTER

  [1:v]scale=h=-1:w=100[overlay_scaled],[0:v][overlay_scaled]overlay=eval=init:x=W-100-W*0.1:y=W*0.1, 

  SECOND FILTER

  drawtext=fontfile=/system/fonts/Roboto-Regular.ttf:text='xbsg':fontcolor=white:fontsize=60:box=1:boxcolor=0x7FFFD4@0.5:boxborderw=20:x=20:y=h-(text_h*2)-(h*0.1):enable='between(t,0,2)',

  THIRD FILTER

  drawtext=fontfile=/system/fonts/Roboto-Regular.ttf:text='cbeh':fontcolor=white:fontsize=30:box=1:boxcolor=0x7FFFD4@0.5:boxborderw=20:x=20:y=h-text_h-(h*0.1)+25:enable='between(t,0,2)',

  FOURTH FILTER

  eq=contrast=1:brightness=0.26180276:saturation=1:gamma=1:gamma_r=1:gamma_g=1:gamma_b=1:gamma_weight=1 
  
  -c:a
  
  copy
  
  /storage/emulated/0/videoApp/temp/frameWithFilters.png

  Right now I am trying to separate the filters using , but I also tried ;

  It throws me back :

  Input #0, png_pipe, from '/storage/emulated/0/videoApp/temp/firstFrameOfMergedVideo.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24(pc), 1080x1920, 25 tbr, 25 tbn, 25 tbc
  
  
  
  Input #1, png_pipe, from '/storage/emulated/0/videoApp/temp/logo.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 528x582, 25 tbr, 25 tbn, 25 tbc
  
  
  
  [NULL @ 0xf265d800] Unable to find a suitable output format for ','
  
  ,: Invalid argument

  If I apply them individual they work.

  I am new to ffmpeg so any help would be appreciated.

• "How can we use Ffmpeg to apply blur, overlay a logo and waveform, and add a border around a video, step by step ? [closed]

  1er février 2024, par itsfaisalkhalid

  We're looking to enhance a video using Ffmpeg by implementing several effects sequentially. First, we aim to apply a blur effect to the entire video. Then, we want to overlay a logo and a waveform onto the blurred video. Finally, we need to add a border around the entire composition. This step-by-step process requires precise commands and careful consideration of parameters to achieve the desired result effectively.

  


  I utilized Ffmpeg commands to sequentially apply blur, overlay the logo and waveform, and add a border to the video. I expected each effect to be applied in the specified order, resulting in a visually enhanced video with all desired elements. However, I encountered challenges in properly configuring the parameters for each effect, leading to unexpected results such as misaligned overlays or improper blur intensity.

  


  @echo off
setlocal enabledelayedexpansion

rem Set paths and directories
set "ffmpeg_path=C:\ffmpeg\bin\ffmpeg.exe"
set "input_dir=_input"
set "output_dir=_output"

rem Ensure input and output directories exist
if not exist "%input_dir%" (
    echo Error: Input directory "%input_dir%" not found.
    exit /b 1
)

if not exist "%output_dir%" (
    mkdir "%output_dir%"
)

rem Loop through input directory
for %%t in ("%input_dir%\*.*") DO (

    rem Process each file with ffmpeg
"%ffmpeg_path%" -y -i "%%t" -i logo.png -filter_complex "\
    [0:v]eq=brightness=0.2:saturation=2.0:contrast=1.2, crop=iw/1.2:ih/1.2, \
    boxblur=1:2 [blurred_bg]; \
    [blurred_bg][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h-10)[bg_with_logo]; \
    [0:a]showwaves=s=1080x100:mode=line:colors=white [waveform]; \
    [bg_with_logo][waveform]overlay=10:H-h-10, \
    format=yuv420p[v]; \
    [v]pad=iw+20:ih+20:x=10:y=10:color=white[final_output]" \
    -map "[final_output]" -map 0:a -c:v h264 -c:a aac -b:a 128k -ar 44100 "%output_dir%\temp.mp4"

    rem Check if output file exists
    if exist "%output_dir%\temp.mp4" (
        rem Calculate new MD5 hash
        certutil -hashfile "%output_dir%\temp.mp4" MD5 > "%output_dir%\temp_md5.txt"

        rem Remove ID3 tag metadata
        "%ffmpeg_path%" -i "%output_dir%\temp.mp4" -map_metadata -1 -c:v copy -c:a copy "%output_dir%\%%~nt.mp4"

        rem Clean up temporary files
        del "%output_dir%\temp.mp4"
        del "%output_dir%\temp_md5.txt"
    ) else (
        echo Error: Failed to create output file for "%%~nt"
    )
)

pause



  


• Evolution #3618 (Fermé) : Préciser les dimensions de l’image du logo SPIP

  12 décembre 2015, par nfriedli Nicolas Friedli

  L’image du pied de page est la seule (?) qui ne précise pas les dimensions dans le code HTML. Toutes les images incluses par des modèles le font.

  La dimension de l’image devrait être déclarée dans le code source : https://checklists.opquast.com/webperf/criteria/les-dimensions-des-images-sont-declarees-dans-le-code-source