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• flient-ffmpeg getting error as "ffmpeg exited with code 1 : pipe:0 : Invalid data found when processing input"

  6 avril 2023, par Abhishek Rawal

  I am trying to create API where i need to get uploaded video and create thumbnail from that video. But conditions are :

  


  

  • Video should not store on local disk

  


  • Once thumbnail is create it should not store on local disk, instead it should directly uploaded to AWS s3 bucket.

  


  


  Following is the code i am trying with :

  


  


  


  const ffmpeg = require('fluent-ffmpeg');
const stream = require('stream');

router.post('/thumbnail', upload.any(), (req, res) => {
  const videoBuffer = req.files[0].buffer;
  
  let readableVideoBuffer = new stream.PassThrough();
    readableVideoBuffer.write(videoBuffer);
    readableVideoBuffer.end()
    
  let bufferStream = new stream.PassThrough();
  
  ffmpeg(readableVideoBuffer)
    .on('filenames', function(filenames) {
      console.log('Will generate ' + filenames.join(', '))
    })
    .on('end', function() {
      console.log('Screenshots taken');
    })
    .on('error', (err) => {
      console.log(err);
    })
    .screenshots({
      count: 4,
      size: '100x100',
      timestamps: ['00:00:01.000'],
    })
    .writeToStream(bufferStream, { end: true });  /* while using this statement i am getting error */
    
    const buffers = [];
    bufferStream.on('data', function (buf) {
      buffers.push(buf);
    });
    bufferStream.on('end', function () {
      const outputBuffer = Buffer.concat(buffers);
      // use s3 bucket code here
      console.log('outputBuffer===========>', outputBuffer)
    });
})

  


  


  



  so while calling this API my app is crashing and i am getting error as :

  


  


  Error : ffmpeg exited with code 1 : pipe:0 : Invalid data found when
processing input

  


  


  Blockquote

  


  If i am not using this statement :

  


  


  .writeToStream(bufferStream, end : true ) ;

  


  


  then able to save file but in local disk, which is not required in my case.

  


  Please help me to understand what is wrong in this code, how i can resolve it.
Any type of help is appreciated.

  


• "No Output pad"error when using ffmpeg to create a subtitle overlay

  7 avril 2023, par user3324136

  I am using a Lambda function to run ffmpeg to rescale a video and then add subtitles from an .ass file.

  


  I have tried a few variations, but am continuing to get an error :
[AVFilterGraph @ 0x721bec0] No output pad can be associated to link label '2'.

  


  The code is below, with the error stemming from the line :
'[0]scale=iw/1.5:ih/1.5,setsar=1[v];[1][v]overlay=-100:320[vid][2]overlay[out]'

  


  CODE

  


      try:
        subprocess.check_call([
            '/opt/ffmpeg',
            '-i', source_file,
            '-i', padding_image_file,
            '-i', subtitles_file,    # Input caption file path
            '-filter_complex',
            '[0]scale=iw/1.5:ih/1.5,setsar=1[v];[1][v]overlay=-100:320[vid][2]overlay[out]',
            '-c:a', 'copy', '-crf', '20', '-preset', 'fast', '-movflags', '+faststart',
            '-y', output_file
    ])


  


• Error "option not found" when trying to output a video file through decklink as PAL standard

  11 avril 2023, par seriously

  I have an ffmpeg build compiled with decklink which is running fine. What I want to achieve is to output a certain video file through the black magic decklinks sdi output port. To do so I used the command ffmpeg -standard PAL -i myvideo.mp4 -pix_fmt uyvy422 -s 1920x1980 -r 25000/1000 -f decklink "DeckLink SDI 4K" but I get error unrecognized option 'standard'. What am I doing wrong or want is the proper way to set PAL as the standard ? Thanks in advance.

  


  super user post suggesting to use -standard as a valid option : https://superuser.com/questions/885880/configure-ffmpeg-and-ffplay-to-pal-signal