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• Concert MP4 Version - FFmpeg

  25 avril 2017, par Luzwitz

  I have two mp4 File :

  1. out.mp4 : ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
  2. video/rio2016/finale/brasse/200.mp4 : ISO Media, MP4 v2 [ISO 14496-14]

  How can I convert 1 to 2 (mp41 to mp42) ?

  Thanks !

• Add support for playing Audible AAXC (.aaxc) files [PATCH v4]

  1er janvier 2000, par Vesselin Bontchev

  Add support for playing Audible AAXC (.aaxc) files [PATCH v4]
  The AAXC container format is the same as the (already supported) Audible
  
  AAX format but it uses a different encryption scheme.
  Note : audible_key and audible_iv values are variable (per file) and are
  
  externally fed.
  It is possible to extend https://github.com/mkb79/Audible to derive the
  
  audible_key and audible_key values.
  Relevant code :
  def decrypt_voucher(deviceSerialNumber, customerId, deviceType, asin, voucher) :
  
      buf = (deviceType + deviceSerialNumber + customerId + asin).encode("ascii")
  
      digest = hashlib.sha256(buf).digest()
  
      key = digest[0:16]
  
      iv = digest[16 :]
      # decrypt "voucher" using AES in CBC mode with no padding
  
      cipher = AES.new(key, AES.MODE_CBC, iv)
  
      plaintext = cipher.decrypt(voucher).rstrip(b"\x00")  # improve this !
  
      return json.loads(plaintext)
  The decrypted "voucher" has the required audible_key and audible_iv
  
  values.
  Update (Nov-2020) : This patch has now been tested by multiple folks -
  
  details at the following URL :
  https://github.com/mkb79/Audible/issues/3
  Signed-off-by : Vesselin Bontchev <vesselin.bontchev@yandex.com>
  

  • [DH] libavformat/isom.h
  • [DH] libavformat/mov.c

• Android ffmpeg Command not executing

  22 juin 2020, par MoTahir

  I am using this FFMPEG library,

  


  first I am playing the video inside my videoView to make sure that the video path is correct

  


  videoView.setVideoURI(Uri.parse(getExternalFilesDir(null)?.absolutePath + "videoToBeEdit"))


  


  then I am calling the code written below to crop the video then put it inside the videoView again just to see the result

  


  val ff = FFmpeg.getInstance(this@EditVideoActivity)
if (ff.isSupported){

  val inFile = File(getExternalFilesDir(null)?.absolutePath ,"videoToBeEdit")
  val outFile = File(getExternalFilesDir(null)?.absolutePath , "result")

  val command = arrayOf("ffmpeg","-i", inFile.absolutePath , "-filter:v", "crop=100:100:0:0", outFile.absolutePath)

  ff.execute(command, object : ExecuteBinaryResponseHandler() {
    override fun onSuccess(message: String?) {
      super.onSuccess(message)
      videoView.setVideoURI(Uri.parse(getExternalFilesDir(null)?.absolutePath + "videoToBeEdit"))
    }

    override fun onProgress(message: String?) {
      super.onProgress(message)
    }

    override fun onFailure(message: String?) {
      super.onFailure(message)
      Log.e("error", "failed")
    }

    override fun onStart() {
      super.onStart()
      Log.e("start", "started the process")
    }

    override fun onFinish() {
      super.onFinish()
      Log.e("finish", "done")
    }
  })
}


  


  but my code above goes from start to error then finish, it doesn't show any error messages and that's making it really hard to know what's actually wrong :( I tried to write my command in different ways following those tutorials tutorial1 tutorial2 link
please help, thank you in advance...