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Sur d’autres sites (11801)

  • FFMPEG - create video in with images and video file

    15 novembre 2018, par Pramod Gehlot

    I am creating video using ffmpeg
    I have some images and video so i want to create video with images and also video
    in node js

    my code

     ffmpeg()  .addInput(__dirname + '/test/fixtures/step_%1d.png')
    
 // .outputOptions(['[0:v]scale=200x200'])
    

    
 .complexFilter([
    
     // 'scale=640:480[rescaled]',
    

    
     {
    
         filter: 'zoompan',
    
         options: {
    
            x: '200',
    
             y: 'ih/2-(ih/zoom/2)',
    
             z: 'min(zoom+0.0005,1.5)',
    
            d: '125',
    
             s: "200x200",
    

    
         },
    
         // "inputs":'[0:v]scale=200x200'
    
     },
    
 ])
    

    
 .format('mp4')
    
 .videoBitrate('1024k')
    
 .videoCodec('mpeg4')
    
 .output(finalVideoPath)
    
 .on("error", function (er) {
    
     console.log("error occured: " + er.message);
    
 })
    
 .on('end', function () {
    
     console.log('Finished processing');
    
 }).run();

    I want to add video , how we can do in this code, Please help me

  • Black overlay appears when merging a transparent video to another video

    13 juin 2012, par RakeshS

    This is what I have done so far :

    Command to create a transparent PNG image :

    convert -size 640x480 -background transparent -fill blue \
    
-gravity South label:ROCK image1-0.png

    Command to create a transparent video :

    ffmpeg -loop 1 -f image2 -i image1-0.png -r 20 -vframes 100 \
    
-vcodec png -pix_fmt bgra mov-1.mov

    (as per this post) - I expect this video to be a transparent video.

    Command to overlay a video with another :

    ffmpeg -i final-video.mov -sameq -ar 44100 \
    
-vf "movie=mov-1.mov [logo];[in][logo] overlay=0:0 [out]" \
    
-strict experimental final-video.mov

    Above commands works perfect and I have not faced any problem, but I don't get what I expect which is kinda watermarking effect, I want mov-1.mov to be transparent with final-video.mov.

    Questions :

    1. Is there any way to verify if the generated video is transparent ? other than merging ?
    2. Not sure why the above mov-1.mov is not transparent when it is merged with final-video.mov, any info to solve this problem would be great.

    Please help.

  • Is there a way to extract every nth frame from an online video without downloading the entire video ?

    13 avril 2018, par Arif

    I’m looking for a website or app that lets you to download individual frames from a video as jpg without downloading the full thing. If there is no such website or app, is it possible via ffmpeg ?

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