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• Quality problem when converting JPEG to GIF using FFmpeg

  25 octobre 2018, par yyms

  I created a GIF using FFmpeg as shown below.
  However, there is a problem with GIF quality. As you can see in the attachment, there are square particles on the GIF surface. I want to improve this.

  • Is it possible to solve this problem with the FFmpeg default option without using the palette option ?

  Can I erase the repeating rectangle pattern shown in the GIF ?

  • "-f", "image2", "-i", "load_path", "-vf", "scale=720x450", "-y", "save_path"

  <img src="local/cache-vignettes/L300xH180/I2Stygif-c60c60e-d4d96.png?1541836614" width='300' height='180' />

  enter image description here

• How can I make a slideshow of images into a video with each image having a specific length of frames to be shown ?

  24 novembre 2013, par jett

  Right now I am using something like this to create a video from a selection of images :

  avconv -i input%05d.png -r 24 -vsync cfr -c:v libx264 output.mp4

  But I want each picture to have a separate amount of time spent on it, so if I have 5 images I might want :

  [10frames, 40frames, 5frames, 80frames, 10frames]

  To be specified. The only thing I could find that may be a solution is to create five separate videos- set the length then merge them together, is this my only choice here ?

• Creating a GIF with fluent-ffmpeg, overlay is not shown ?

  5 mars 2021, par blablubla12

  I'm trying to create a GIF from an mp4 video, with an overlay on it. So there are two inputs, video.mp4 and overlay.png, both of them are https urls.

  


  The gif is created, ffmpeg shows no errors but the overlay doesn't appear in the gif. The code :

  


  ffmpeg()
    .withOptions([
        '-i video.mp4'
        `-ss 1`,
        `-i overlay.png`,
        '-f gif',
        `-filter_complex [0:v]trim=duration=3,setpts=PTS-STARTPTS,scale=450:-1[trimmed];[trimmed]split[trimmed1][trimmed2];[trimmed2]reverse[rev];[trimmed1][rev]concat=n=2:v=1:a=0[v];[v][1:v]overlay=0:0:format=rgb[overlayed];[overlayed]split[a][b];[a]palettegen=stats_mode=diff[palette];[b][palette]paletteuse=bayer:bayer_scale=3.5`
    ])
    .on('start', cmdLine => {
        console.log(`Started FFMpeg`, cmdLine);
    })
    .on('end', () => {
        console.log(`Success!.`);
        resolve();
    })
    .on('error', (err: Error, stdout, stderr) => {
        console.log(` Error:`, err.message);
        console.error('stdout:', stdout);
        console.error('stderr:', stderr);
        reject();
    })
    .pipe(destinationStream, { end: true });


  


  Note : I have to use a stream, instead of saving to file.