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• what is audio PCM's frame sync word to identify the beginning position

  12 décembre 2019, par chang jc

  As title ; for some compressed format such as EAC3, AC3 frame starts as a sync word.

  So what’s PCM (raw audio)’s sync word ? How to identify the beginning of a PCM frame ?

  I met a problem where audio is concatenated by several audio segments and each of them has different frame size. I need to identify the start position.

  Thanks in advance.

• avformat/dtsdec : Extend DTS core sync word

  28 avril 2015, par foo86

  avformat/dtsdec : Extend DTS core sync word
  Check extended sync word for 16-bit LE and BE core streams to reduce
  
  probability of alias sync detection. Previously sync word extension was
  
  checked only for 14-bit streams.
  This follows up the similar change in avcodec/dca_parser.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/dtsdec.c

• How to automatically use python to create list for every word ? [closed]

  13 juin 2020, par Kanglando

  

  



  Here is wav and image file . and you can donwload it - https://www.dropbox.com/s/iuwt6boc2r2fotc/word_images_file.zip?dl=0

  



  1st step create word list txt file for every word.

  



  put image name to list , and the list name is every word.

  



  but I don't know how to write python code for create every word image list .

  



  example :

  



  accordion-word.txt

  file 'accordion_1_musical_instruments.jpg'
  file 'accordion_2_musical_instruments.jpg'
  file 'accordion_3_musical_instruments.jpg'
  file 'accordion_musical_instruments.jpg'


  



  2nd step create audio file list

  



  don't know how to use python write code to create list for every word audio.

  



  accordion-audio.txt

     file 'slience_2sec.mp3'
     file 'This_is_.mp3'
     file 'slience_2sec.mp3
     file 'accordion.mp3'


  



  Thank you !