Recherche avancée

Sur d’autres sites (9616)

• How to delogo center in ffmpeg

  5 octobre 2017, par Pewh Gosh

  How to delogo on center image in ffmpeg ? To delogo top left, I use something like this.

  ffmpeg -i tes.png -vf "delogo=x=10:y=10:w=40:h=40" a.png

  But for delogo on center image, I experiment like this but show error.
  ffmpeg -i tes.png -vf "delogo=x=(W-w)/2:y=(H-h)/2:w=40:h=40" a.png

  UPDATE :

  Thanks for all replies that tell me that delogo only accept absolute integer. Maybe my next strategy is measure width & height of image via ffmpeg, calculate, then set as value of delogo. I’ll accept an answer who able to make that script work automatically.

• Find upload speed of streaming video via nstask

  3 octobre 2017, par Swati

  I am streaming live video to an RTMP server using FFMPEG, NSTASK in a cocoa app.

  The task is achieved but now I want to calculate the upload speed.

  Any suggestions how can I do this.

• Insert text on sequence of image and create video using imagemagick or graphicsmagick with node.js

  12 décembre 2015, par Keyur Sakaria

  I am trying to create a sequence of image with dynamic text using imagemagick and then convert into video using ffmpeg. The issue I am facing right now :

  1. I was able to put text on image but now I want to move that text and sync with the character on image. Below is the link of what I have achieved

  http://tinypic.com/player.php?v=2ciic8g%3E&s=9#.VmrAZUp97Dc

  The bright white "text goes here" text should sync with the character behind

  Below is the code which I have written

  gm("original_images/moving/" + text + ".png")
  
      .fill("#FCF7FB")
  
      .fontSize(40)
  
      .drawText(x, moveY, "text goes here", "center")
  
      .font("font/BTTTRIAL_1.ttf")
  
      .write("newImages/demo" + i + ".png", function(err)
  
      {
  
          count++;
  
          console.log("success : " + err);
  
          console.log("i : " + i);
  
          console.log("moving : " + moveX);
  
  
  
          if(count == 72)
  
          {
  
              console.log(count);
  
              var date = moment().format('MMMMDDYYYYhmmssa');
  
              var cmd = 'ffmpeg -r 17 -i newImages/demo%d.png -c:v libx264 -r 24 -pix_fmt yuv420p output/' + date + '.mp4';
  
  
  
              exec(cmd, function(error, stdout, stderr)
  
              {
  
                  console.log(error)
  
                  console.log(stdout)
  
                  console.log(stderr)
  
              });
  
          }
  
      });

  I am trying to calculate x and y according to image and im getting the values in decimal, which graphicsmagick is not considering and rounding it thus text is not syncing with image and goes up and down

  If you have any other suggestions or ways to achieve what im trying to do please let me know.

  Thanks in advance.