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• How can I convert an FFmpeg command line to ffmpeg-python code ?

  3 septembre 2021, par kup

  I have this command-line code :

  


  ffmpeg -i 0.mp4 -c:v libx265 -preset fast -crf 28 -tag:v hvc1 -c:a aac -bitexact -map_metadata -1 out.mkv


  


  And I want to convert it to ffmpeg-python code in Python.

  


  But how can I do it ?

  


  This is what I have done so far :

  


  import ffmpeg

(
    ffmpeg
    .input('0.mp4')
    .filter('fps', fps=30)
    .output('out.mkv', vcodec='libx265', crf=28, preset='fast', movflags='faststart', pix_fmt='yuv420p')
    .run()
)


  


• fate/ffmpeg : Add bitexact flag for ffmpeg-input-r test

  4 septembre 2023, par Andreas Rheinhardt

  fate/ffmpeg : Add bitexact flag for ffmpeg-input-r test
  Fixes the test when the non-bitexact MMXEXT versions of
  
  the hpeldsp functions are used.
  Reviewed-by : Anton Khirnov <anton@khirnov.net>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] tests/fate/ffmpeg.mak

• Error happened : 'spawn ffmpeg ENOENT', Node.js & FFmpeg

  4 juin 2021, par Esha Joshi

  I'm really struggling to get ffmpeg working to read .webm data from a file and write that data to a .pcm file. I have ffmpeg at the file location and have made it executable with the sudo chmod +x ffmpeg command.

  


  Does anyone have any idea how I can fix this ? Thank you in advance !

  


         const ffmpeg = require('fluent-ffmpeg')
       const ffmpegPath = 'C:\\usr\\local\\bin\\ffmpeg.exe'
       ffmpeg.setFfmpegPath(ffmpegPath)

      // Now read from the test-video .webm file
        const inputFile = 'test-video.webm'
        var inputStream = fs.createReadStream(inputFile)
        inputStream.on('error', function(error) {
            console.log(`\tError with reading from input stream: ${error}`)
        })

        // And write that data to the .pcm audio file
        var outputFileName = 'test-extracted-audio.pcm'
        var outputStream = fs.createWriteStream(outputFileName)

        var ffmpeg = child_process.spawn('ffmpeg', ['-y', '-i', '-vn', '-ac', '1', '-ar', '16000', 'pcm_s16le'])
        inputStream.pipe(ffmpeg.stdin)
        ffmpeg.stdout.pipe(outputStream)

        ffmpeg.stderr.on('data', function (data) {
            // console.log(data.toString())
            console.log(`DATA FROM FFMPEG: ${data}`)
        })

        ffmpeg.stderr.on('end', function () {
            console.log('\tWebm -> PCM File has been converted succesfully')
        })
        
        ffmpeg.stderr.on('exit', function () {
            console.log('\tFFMPEG child process exited')
        })
        
        ffmpeg.stderr.on('close', function() {
            console.log('\t...Closing time! Bye')
        })