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• Can ffmpeg seek when using an input stream (or url) ?

  27 juin 2022, par Roee

  I've been using ffmpeg quite a lot in the past few weeks, and recently I've encountered a very annoying issue - when I use ffmpeg with an input stream (usually, just a url as the input) and try to set a start time (with -ss option), I always get a warn message that says "could not seek to position : XXX".

  



  Then, ffmpeg just starts to download the file, and it ouputs nothing until it has downloaded enough data and got to my desired start time.

  



  I'll give an example :

  



  I use this command to execute ffmpeg :

  



  ffmpeg -ss 50 -re -i https://ascent.usbank.com/acp/videos/041114ascent.flv -b:a 128k -ac 2 -acodec libvorbis -b:v 1024k -vcodec libtheora -strict 2 -preset ultrafast -tune zerolatency -pix_fmt yuv420p -f ogg pipe:1


  



  and I get the warn message

  



  https://ascent.usbank.com/acp/videos/041114ascent.flv: could not seek to position 50.000


  



  Then, it takes about 30 seconds until ffmpeg starts to output data to stdout. And when I try this with longer videos (and longer seek times), it takes even longer.

  



  My question is, what can I do ? I guess it's impossible for ffmpeg to seek when it haven't got the whole input stream... Am I wrong ? Or is there any other solution ?

  



  Of course I try to avoid downloading the entire file from the web...

  



  Thanks in advance !

  



  Roee.

  


• Can ffmpeg seek when using an input stream (or url) ?

  17 janvier 2016, par Roee

  I’ve been using ffmpeg quite a lot in the past few weeks, and recently I’ve encountered a very annoying issue - when I use ffmpeg with an input stream (usually, just a url as the input) and try to set a start time (with -ss option), I always get a warn message that says "could not seek to position : XXX".

  Then, ffmpeg just starts to download the file, and it ouputs nothing until it has downloaded enough data and got to my desired start time.

  I’ll give an example :

  I use this command to execute ffmpeg :

  ffmpeg -ss 50 -re -i https://ascent.usbank.com/acp/videos/041114ascent.flv -b:a 128k -ac 2 -acodec libvorbis -b:v 1024k -vcodec libtheora -strict 2 -preset ultrafast -tune zerolatency -pix_fmt yuv420p -f ogg pipe:1

  and I get the warn message

  https://ascent.usbank.com/acp/videos/041114ascent.flv: could not seek to position 50.000

  Then, it takes about 30 seconds until ffmpeg starts to output data to stdout. And when I try this with longer videos (and longer seek times), it takes even longer.

  My question is, what can I do ? I guess it’s impossible for ffmpeg to seek when it haven’t got the whole input stream... Am I wrong ? Or is there any other solution ?

  Of course I try to avoid downloading the entire file from the web...

  Thanks in advance !

  Roee.

• How to add Title in video by ffmpeg on Node JS

  30 juin 2024, par Md Nazmul Hossain

  I am working on a project where I have to add Title on a video by FFmpeg. I have already succeeded in adding a picture on a video. Can anybody help me to add Text(Title) on a video ?

  



  Here is my code for adding Image, please suggest the required modification :

  



      try {
        var process = new ffmpeg('public/'+req.body.video);
        process.then(function (video) {
          console.log('The video is ready to be processed');
          var watermarkPath = 'public/images/logo.png',
            newFilepath = 'public/videos/watermarked/'+name,
            settings = {
                position        : "SC"      // Position: NE NC NW SE SC SW C CE CW
              , margin_nord     : null      // Margin nord
              , margin_sud      : null      // Margin sud
              , margin_east     : null      // Margin east
              , margin_west     : null      // Margin west
            };
          var callback = function (error, files) {
            if(error){
              console.log('ERROR: ', error);
            }
            else{
              console.log('TERMINOU', files);
              res.send('videos/watermarked/'+name)
            }
          }
          //add watermark
          video.fnAddWatermark(watermarkPath, newFilepath, settings, callback)

        }, function (err) {
          console.log('Error: ' + err);
        });
      } catch (e) {
        console.log(e.code);
        console.log(e.msg);
      }