Recherche avancée

Sur d’autres sites (10429)

• Using FFMPEG to create animated GIF from series of images and insert text for each image

  11 janvier 2021, par mwcmwc

  I am generating an animated gif from a series of png's labeled img_00.png, img_01.png, etc. I want to insert text to the top right corner of the animated gif for each frame that is generated from the png to display some specific information. For example say I have 3 pngs, img_00, img_01, and img_02...what I want from the gif is :

  


  For frame generated from img_00, display "This is from img_00".
For frame generated from img_01, display "This is from img_01".
For frame generated from img_02, display "This is the last image generated from img_02 !".

  


  So far I have been messing around with drawtext option (assuming framerate=1) :

  


  ffmpeg -f image2 -framerate 1 -i img_%02d.png -filter_complex "drawtext=enable='between(t,0,1)':text='word1':fontsize=24:fontcolor=white:x=w-tw:y=0,drawtext=enable='between(t,1,2)':text='word2':fontsize=24:fontcolor=white:x=w-tw:y=0" out.gif


  


  But I am getting "word1" and "word2" overlapped on top of each other. Is there a better way of doing this or someway to fix drawtext so the overlap doesn't happen ?

  


• ffmpeg - how to merge multiple audio with time offset into a video

  8 septembre 2021, par Andrews Gilbert

  ffmpeg -y -i earth.mp4 -i 1.wav -i 2.wav -i 3.wav -filter_complex "[1]adelay=delays=5s:all=1[r1]; [2]adelay=delays=8000S:all=1[r2]; [3]adelay=delays=15s:all=1[r3]; [r1][r2][r3]amix=inputs=3[a]"  -map 0:v -map "[a]" -codec:v copy output.mp4


  


  I am using the above code but getting an error in ubuntu 20.04.1

  


  Error is => Error initializing filter 'adelay' with args 'delays=1s:all=1'

  


• ffmpeg nodejs lambda crop issue

  29 juillet 2020, par Ajouve

  I have a lambda function to crop videos with ffmpeg

  


  I am installing the layer this way

  


  #!/bin/bash
mkdir -p layer
cd layer
rm -rf *
curl -O https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-amd64-static.tar.xz
tar -xf ffmpeg-git-amd64-static.tar.xz
mv ffmpeg-git-*-amd64-static ffmpeg
rm ffmpeg-git-amd64-static.tar.xz


  


  I do not really which version but should be recent as I did it today for the last time

  


  Then my node js lambda function is running with the following nodejs module https://github.com/fluent-ffmpeg/node-fluent-ffmpeg

  


  return new Promise((resolve, reject) => {
        ffmpeg(inputFile.name)
            .videoFilters(`crop=${width}:${height}:${x}:${y}`)
            .format('mp4')
            .on('error', reject)
            .on('end', () => resolve(fs.readFileSync(outputFile.name)))
            .save(outputFile.name);


  


  with for example videoFilters('crop=500:500:20:20')

  


  And I have the folowing error

  


  ffmpeg exited with code 1: Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
Conversion failed!


  


  On my local computer I am running the following command on the exact same image

  


  ffmpeg -i in.mp4 -filter:v "crop=500:500:20:20" out.mp4


  


  my version of ffmpeg is 4.2.2 and this is working great

  


  I do not have the issue with all videos, here one video which is causing me the issue https://ajouve-util.s3.amazonaws.com/earth.mp4