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• Incorporating ffmpeg in a bash script

  22 novembre 2017, par Voprosnik

  I have a very large audio mp4 file that contains several songs.

  I have generated a script which reads a text file with the times and the song names and successfully assigns starttime, endtime and songtitle in 3 variables. The script successfully echoes the variables and returns the following format :

  00:00:00 00:10:15 Song1
  
  00:10:15 00:14:20 Song2

  and so on...

  Now I am intending to use this script with ffmpeg and crop each part of the big file into smaller audio files.

  The script thus, after feeding the variables in a while loop, it reaches to the command

  ffmpeg -ss $START -t $END -i ${1} -acodec copy $SONGNAME.mp4

  Once I run the script, the first two songs are cropped, but then the whole process stops with

  Press [q] to stop, [?] for help
  
  error parsing debug value
  
  debug=0

  I checked the generated files and they play ok, but there is no way for me to know why the script stopped there and did no proceed to the rest of the file (considering that when in the script I replace ffmpeg with echo, the script echoes the variables flawlessly).

  In other words I don’t know if there is a problem in my script, ffmpeg, or the source music file.

• Incorporating ffmpeg in a bash script

  12 septembre 2014, par Voprosnik

  I have a very large audio mp4 file that contains several songs.

  I have generated a script which reads a text file with the times and the song names and successfully assigns starttime, endtime and songtitle in 3 variables. The script successfully echoes the variables and returns the following format :

  00:00:00 00:10:15 Song1
  
  00:10:15 00:14:20 Song2

  and so on...

  Now I am intending to use this script with ffmpeg and crop each part of the big file into smaller audio files.

  The script thus, after feeding the variables in a while loop, it reaches to the command

  ffmpeg -ss $START -t $END -i ${1} -acodec copy $SONGNAME.mp4

  Once I run the script, the first two songs are cropped, but then the whole process stops with

  Press [q] to stop, [?] for help
  
  error parsing debug value
  
  debug=0

  I checked the generated files and they play ok, but there is no way for me to know why the script stopped there and did no proceed to the rest of the file (considering that when in the script I replace ffmpeg with echo, the script echoes the variables flawlessly).

  In other words I don’t know if there is a problem in my script, ffmpeg, or the source music file.

• fluent-ffmpeg video has stretched image

  16 avril 2024, par Martin

  I have an mp3 audio file and a jpg image file. I want to combine these two files into a new mp4. I have a working fluent-ffmpeg command that does exactly what I want, except somethings an image will be stretched in the final output video. It seems to happen consistently with jpgs I export from photoshop.

  


  Is there any way I can specify in my ffmpeg command to keep the same resolution of my image and not to stretch it ?

  


  My function below :

  


  async function debugFunction() {
    console.log('debugFunction()')
    //begin setting up ffmpeg
    const ffmpeg = require('fluent-ffmpeg');
    //Get the paths to the packaged versions of the binaries we want to use
    var ffmpegPath = require('ffmpeg-static-electron').path;
    ffmpegPath = ffmpegPath.replace('app.asar', 'app.asar.unpacked')
    var ffprobePath = require('ffprobe-static-electron').path;
    ffprobePath = ffprobePath.replace('app.asar', 'app.asar.unpacked')
    //tell the ffmpeg package where it can find the needed binaries.
    ffmpeg.setFfmpegPath(ffmpegPath);
    ffmpeg.setFfprobePath(ffprobePath);
    //end setting ffmpeg

    let imgPath = "C:\\Users\\marti\\Documents\\martinradio\\image.jpg";
    let audioPath = "C:\\Users\\marti\\Documents\\martinradio\\audio.mp3";
    let vidPath = "C:\\Users\\marti\\Documents\\martinradio\\video.mp4";

    //create ffmpeg command
    ffmpeg()
    //set rendering options
    .input(imgPath)
    .loop()
    .addInputOption('-framerate 2')
    .input(audioPath)
    .videoCodec('libx264')
    .audioCodec('copy')
    .audioBitrate('320k')
    .videoBitrate('8000k', true)
    .size('1920x1080')
    .outputOptions([
        '-preset medium',
        '-tune stillimage',
        '-crf 18',
        '-pix_fmt yuv420p',
        '-shortest'
    ])
    //set status events
    .on('progress', function (progress) {
        if (progress.percent) {
            console.log(`Rendering: ${progress.percent}% done`)
        }
    })
    .on('codecData', function (data) {
        console.log('codecData=', data);
    })
    .on('end', function () {
        console.log('Video has been converted succesfully');
    })
    .on('error', function (err) {
        console.log('errer rendering video: ' + err.message);
    })
    //run ffmpeg command
    .output(vidPath).run()

}


  


  renders successfully if I give it an audio file and this image :

  


  

  


  But the output video looks like this :

  


  

  


  You can see that the image was squished and stretched out like a rectangle, while I would like to keep it a cube.