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• FFMPEG : preset not found in Windows Vista

  12 juin 2012, par StackOverflowNewbie

  I download FFMPEG from http://www.videohelp.com/tools/ffmpeg#download and saved it in my c :\program files\ffmpeg (Windows Vista). My Path's first 2 entries are :

  c:\program files\ffmpeg\bin;c:\program files\ffmpeg\presets;

  I found the following command on the net (http://paulrouget.com/e/converttohtml5video/)

  ffmpeg -i input.avi -acodec libvorbis -ab 96k -vcodec libx264 -vpre main -level 21 -refs 2 -b 345k -bt 345k -threads 0 -s 320x240 output.mp4

  When I run this on command line, I get the following error :

  File for preset main not found

  Any ideas what might be wrong ?

• FFMPEG : preset not found in Windows Vista

  18 mars, par StackOverflowNewbie

  I download FFMPEG from http://www.videohelp.com/tools/ffmpeg#download and saved it in my c :\program files\ffmpeg (Windows Vista). My Path's first 2 entries are :

  



  c:\program files\ffmpeg\bin;c:\program files\ffmpeg\presets;


  



  I found the following command on the net (http://paulrouget.com/e/converttohtml5video/)

  



  ffmpeg -i input.avi -acodec libvorbis -ab 96k -vcodec libx264 -vpre main -level 21 -refs 2 -b 345k -bt 345k -threads 0 -s 320x240 output.mp4


  



  When I run this on command line, I get the following error :

  



  File for preset main not found

  



  Any ideas what might be wrong ?

  


• Video player scroll doesn't work after ffmpeg audio and video merge (NodeJS)

  1er novembre 2022, par Pietro Leto

  I made youtube downloader to download video from youtube using nodejs library ytdl-core. If I wanted to download video with best quality I had to download them without sound. So, in my script, I download audio and video separately and I merge them into an mp4 file.
What's the problem ? Video player scroll doesn't work. I can see the video but I can't going back or move on, and I can't see video duration.

  


  const express = require("express");
const cors = require("cors");
const app = express();
const ffmpeg = require('ffmpeg-static');
const cp = require('child_process');
const ytdl = require("ytdl-core");

app.use(cors());

app.listen(3000, () => {
    console.log("Server is working at port 3000 !!");
});

app.get('/download', (req,res) => {
    var url = req.query.URL;
    var formato = req.query.FORMAT;

    try {
        let vid = ytdl(url,{filter:'videoonly', quality:'highestvideo'})
        let aud = ytdl(url, {filter: 'audioonly', quality:'highestaudio'});

        ytdl.getInfo(url).then(info => {
            titolo = info.videoDetails.title;

            res.header("Content-Disposition", 'attachment;  filename=' + titolo + '.mp4');

            const ffmpegProcess = cp.spawn(ffmpeg, [
                '-i', `pipe:3`,
                '-i', `pipe:4`,
                '-map','0:v:0',
                '-map','1:a:0',
                '-c:v', 'copy',
                '-c:a', 'aac',
                '-crf','27',
                '-preset','veryfast',
                '-movflags','frag_keyframe+empty_moov',
                '-f','mp4',
                '-loglevel','error',
                '-'
            ], {
                stdio: [
                'pipe', 'pipe', 'pipe', 'pipe', 'pipe',
                ],
            });
              
            aud.pipe(ffmpegProcess.stdio[4]);
            vid.pipe(ffmpegProcess.stdio[3]);
            ffmpegProcess.stdio[1].pipe(res);
        });
    }
    catch(err) {
        console.log("Error with URL: " + url + "\nERROR: " + err + "\n\n");
    }
});


  


  I have not found alternatives to do this. I need a working script to download youtube videos with good quality.