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• Custom Reading Function for FFMPEG I/O

  20 septembre 2015, par Joe Allen

  I need to create a custom reading callback function that can read contents of a file in the form of a std::string into a uint8_t * buf. I tried multiple different methods found around the internet and on stackoverflow but sometimes it works and other the the program infinitely loops or stops execution half way.

  I have no problems with amr/3gp files but all wav/pcm files are causing some problems for some reason. All I know its something to do with the reading function I have so far.

  Ideally I would like to be able to give the program any type of file and then it converts it.

  This is how I am calling the readCallback function from the code :

  //create the buffer
  
  uint8_t * avio_ctx_buffer = NULL;
  
  
  
  //allocate space for the buffer using ffmpeg allocation method
  
  avio_ctx_buffer = (uint8_t *) av_malloc(avio_ctx_buffer_size);
  
  
  
  //Allocate and initialize an AVIOContext for buffered I/O.
  
  //audio variable contains the contents of the audio file
  
  avio_ctx = avio_alloc_context(avio_ctx_buffer, avio_ctx_buffer_size,0, &audio, &readCallback, NULL, NULL);

  Here is the callback function that works on some types of files :

  static int readCallback(void* opaque, uint8_t * buf, int buf_size){  
  
    std::string * file =static_cast(opaque);
  
    if(file->length() == 0){
  
     return AVERROR_EOF; //if we reach to the end of the string, return
  
                         // return End of file
  
    }
  
  
  
    // Creating a vector of the string size
  
    std::vector array(file->length());
  
  
  
    //Copying the contents of the string into the vector
  
    std::copy(file->begin(),file->end(),array.begin());
  
  
  
    //Copying the vector into buf
  
    std::copy(array.begin(),array.end(),buf);
  
  
  
  
  
    return file->length();
  
  
  
  }

• http: Support setting custom User-Agent

  6 mars 2014, par Clément Bœsch

  http: Support setting custom User-Agent
  Contextually make the default User-Agent use the common
  
  "Name/Version" pattern.
  Signed-off-by : Luca Barbato <lu_zero@gentoo.org>
  

  • [DBH] doc/protocols.texi
  • [DBH] libavformat/http.c

• FFMPEG m3u8 video download from login required site

  30 octobre 2024, par Nirob Saju

  I am trying to download an m3u8 video using FFmpeg from a site that requires login to access the content. When inspecting the Network tab in Chrome DevTools, I see that the response for the /k/timestamp file is encrypted. I have identified some JavaScript files that seem to handle the decryption, and I need help extracting or decoding the AES key used for this encryption.

  


  m3u8 video link :

  


  https://qcdn.spayee.in/spees/w/o/6220ccd30cf263f8af9067d0/v/63e4f548e4b0eefe383262fb/u/66ed03d201d3836b2a2e9a14/t/563072098a6027b88583b67efb5d3662/p/assets/videos/6220ccd30cf263f8af9067d0/2023/02/09/63e4f548e4b0eefe383262fb/hls_500k_.m3u8

  


  ffmpeg error :

  


  [hls @ 0432ea40] Unable to open key file https://qcdn.spayee.in/spees/w/o/6220ccd30cf263f8af9067d0/v/63e4f548e4b0eefe383262fb/u/66ed03d201d3836b2a2e9a14/t/b4a8d7afda4fbc89a2dc30762bc176db/p/assets/videos/6220ccd30cf263f8af9067d0/2023/02/09/63e4f548e4b0eefe383262fb/k/timestamp

  


  k/timestamp encrypted response :

  


  RD�QC+��Kɨi�r|>dnmwK}N !UkqC[66Ye0ZOw ?o6660)]2� !y��jaM�S��

  


  js files :

  


  https://d502jbuhuh9wk.cloudfront.net/static/files/hls.324013256245304581.min.js
https://drive.google.com/file/d/1HBm_ykS7UVSaY6zyF4G1_RJb9IdgA32W/view?usp=sharing

  


  any idea how to successfully download the video ? note : i also try with yt-dlp but not downloading