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• "Cannot find ffmpeg" error when using 'audioconcat'

  2 janvier 2020, par Mosukoshide

  I would like to concatenate three ’.oga’ sound files using audioconcat, however whenever I try to do so, I am met with this error :

  Error: Error: Cannot find ffmpeg
  
      at /root/user/node_modules/fluent-ffmpeg/lib/processor.js:136:22
  
      at /root/user/node_modules/fluent-ffmpeg/lib/capabilities.js:123:9
  
      at /root/user/node_modules/fluent-ffmpeg/lib/capabilities.js:116:11
  
      at /root/user/node_modules/fluent-ffmpeg/lib/utils.js:223:16
  
      at F (/root/user/node_modules/which/which.js:68:16)
  
      at E (/root/user/node_modules/which/which.js:80:29)
  
      at /root/user/node_modules/which/which.js:89:16
  
      at /root/user/node_modules/isexe/index.js:42:5
  
      at /root/user/node_modules/isexe/mode.js:8:5
  
      at FSReqWrap.oncomplete (fs.js:152:21)
  
  ffmpeg stderr: undefined

  I have already installed ffmpeg with the flags that were listed on the audioconcat npm page like this :

  npm i ffmpeg --enable-libass --enable-libmp3lame

  And the code I am trying to run looks like this :

                  audioconcat(audioFiles)
  
                  .concat(`main.oga`)
  
                  .on('start', function (command) {
  
                    console.log('ffmpeg process started:', command)
  
                  })
  
                  .on('error', function (err, stdout, stderr) {
  
                    console.error('Error:', err)
  
                    console.error('ffmpeg stderr:', stderr)
  
                  })
  
                  .on('end', function (output) {
  
                    console.error('Audio created in:', output)
  
                  })

  I’m not sure how to fix this problem...

• Android : How to record the mobile screen without using USB cable ?

  21 juin 2012, par Rajesh

  I want to build an application which would record my screen activities and would store them in a video file.

  1) I need to take the screenshots of my screen movements at periodic intervals and store them on the SD card.

  2) How can I create the video from the images which are already available on my SD card. I have tried with the FFMPEG. But I have encountered a few problems I don't know how to solve. The truth is I don't know the program to convert them.

  3 ) Is it possible to show the picture in my camera ?? That means if a user opens the camera from my app, it should show the pictures which are available on the SD card. If so, please advice me.

  EDIT : I have made a sample which can capable of taking 7 screen shots per second.

  Thanks,
  Rajesh .

• how to let ffplay process whats happening ?

  3 septembre 2023, par boplip

  my ffplay is trying to hard to process something. I sped up my voice in real-time with ffmpeg and I am using ffplay. ffplay is trying to process my voice fast but isn't able to because it cant go past time. someone told me to use -re before -i but that doesnt work. is there a way to get ffplay to process something slower ?

  


  i tried speeding up my voice.

  


  when I pause ffplay and talk then resume it, it works perfect. but when I just let it do it in real-time, the audio starts cutting in and out. I want to be able to not have to pause it to talk fast.