Node-fluent-ffmpeg: How to view the ffmpeg command line generated by fluent ffmpeg?

[computersrmyfriends]

Hi,
How do I get the generated command that's being executed by fluent ffmpeg?
Is there a function that would return this string?

Thanks.

[coyotte508]

+1

I'd like to know what the error message of ffmpeg is (instead of process exited with status 1) and having the command line would help.

[njoyard]

Guys, please read the docs first...
start event with command line : https://github.com/fluent-ffmpeg/node-fluent-ffmpeg#start-ffmpeg-process-started
ffmpeg console output : https://github.com/fluent-ffmpeg/node-fluent-ffmpeg#stderr-ffmpeg-output

[forresthopkinsa]

@njoyard Is there a way to get the command line without spawning an ffmpeg process? I'm wondering if this tool can be used just to create the command string.

[gclsoft]

how to print?

[letoribo]

.on('start', (cmdline) => console.log(cmdline))

https://github.com/fluent-ffmpeg/node-fluent-ffmpeg#start-ffmpeg-process-started

[gclsoft]

  createCommand(conf = {}) {
    const {threads = 1} = conf;
    const command = ffmpeg();
    if (threads > 1) command.addOptions([`-threads ${threads}`]);
    console.log("###:"+command)
    return command;
  },

    this.command = FFmpegUtil.createCommand();
    this.command.on('start', (cmdline) => {
      console.log(cmdline)
    })

@letoribo Not work. How to print it?

[gclsoft]

    const command = ffmpeg();
    command.on('start', (cmdline) => {
      console.log(cmdline)
    })

@letoribo Not work. How to print it?

[gclsoft]

It does work. Thanks!