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• Delay on FFmpeg Watermark [duplicate]

  8 octobre 2020, par Tevin Mosley

  Hello I am trying to use a .bat file to watermark videos I upload to my website. I want the watermark to start 2/3 the way through the video. I've written the code below to do it :

  


  set ffmpeg="C:\ffmpeg\bin\ffmpeg.exe"
set ffprobe="C:\ffmpeg\bin\ffprobe.exe"

setlocal disabledelayedexpansion
for %%a in ("H:\4 - Watermark Process\Before\*.mp4") do (
    for /F "delims=" %%I in ('ffprobe -v quiet -show_entries format^=duration stream^=width -of csv^=p^=0:s^=x "%%a"') do set "duration=%%I"
    echo Duration is: %duration%
    do (
    
         ffmpeg -i logo.png -y -v quiet -vf scale=%%I*0.25:-1 scaled.png
         ffmpeg -i "%%a" -vf "movie=scaled.png [watermark]; [in][watermark] overlay=10:main_h-overlay_h:enable=gte(t\,duration*2/3) [out]" "H:\4 - Watermark Process\After\%%~na.mp4"
    )
)

pause 10


  


  The problem is I get a few errors

  


  The first is the duration has no output when I use echo to see if it is working I get :

  


  


  echo Duration is :

  


  


  And I get other errors in my overlay code

  


  Error

  


• ffmpeg add watermark by output part count (watermark1.png for part 1, ...)

  12 octobre 2020, par Steapy

  I have currently following code (not optimized yet !) :

  


  converter.StartInfo.Arguments = @"-i video.mp4 -i watermark.png -filter_complex ""overlay = x = (main_w - overlay_w) / 2:y = (main_h - overlay_h) / 2"" output%03d.mp4";


  


  This renders all my parts with the same "watermark.png" file as a watermark. But now i want to do something like this :

  


  converter.StartInfo.Arguments = @"-i video.mp4 -i watermark%03d.png -filter_complex ""overlay = x = (main_w - overlay_w) / 2:y = (main_h - overlay_h) / 2"" output%03d.mp4";


  


  "output000.mp4" has "watermark000.png" as a watermark,
"output001.mp4" has "watermark001.png" as a watermark,
"output002.mp4" has "watermark002.png" as a watermark, ...

  


  I need it in only one line, as if i would type it in cmd and it should work in c# with UseShellExecute=false.

  


  Any idea ?

  


• Reduce volume when the watermark playing using FFMPEG

  2 novembre 2020, par Mouaad Abdelghafour AITALI

  I'm using the createWaterMark method to create an audio watermark that play 3 times, the injectWaterMark inject the created watermark into the original audio file, everything works fine, but I would like to reduce the volume of the original audio file when the watermark start playing.

  


   public static String createWaterMark(String inputPath, String outputPath, int duration) {
        return "-y -i " + inputPath + " -af apad -t " + duration / 3 + " " + outputPath;
    }

    public static String injectWaterMark(String inputPath, String waterMarkPath, String outputPath) {
        return "-y -i " + inputPath + " -filter_complex amovie=" + waterMarkPath + ":loop=0,asetpts=N/SR/TB[beep];[0][beep]amix=duration=shortest,volume=2 " + outputPath;
    }


  


  Thank you