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• lavc/videotoolboxenc : flush/free frames on close

  10 octobre 2016, par Rick Kern

  lavc/videotoolboxenc : flush/free frames on close
  Prevents encode callback from running after codec is closed.
  
  Fixes a crash when an error is returned.
  Signed-off-by : Rick Kern <kernrj@gmail.com>
  

  • [DH] libavcodec/videotoolboxenc.c

• Need to record and stream live video in ffmpeg

  16 août 2020, par ankurgoel

  Need to record live webcamera and live stream it also record at the same time on the server.

  


  I was trying to implement this using FFMpeg in vue but not sure if this is the best way to implement this.

  


  Please guide if this can be done more efficiently than this.

  


• How can close file using popen ?

  31 mai 2021, par Yongqi Z

  I write a cpp server to process audio file using ffmpeg, and use rm -rf audio_folder to delete the completed files in the server. There are original audio file and converted audio file using ffmpeg under audio_folder.

  


  1 My operation steps

  


  I use ./ffmpeg -i /audio_folder/origin.wav -ar 8000 -acodec pcm_s16le -ac 1 -fflags +bitexact -ignore_unknown -vn -flags:v +bitexact -flags:a +bitexact -map_metadata -1 /audio_folder/coverted.wav to covert audio files.

  


  I use rm -rf audio_folder to delete completed files.

  


  code likes this :

  


  std::string cmd = "./ffmpeg -i /audio_folder/origin.wav -ar 8000  /audio_folder/coverted.wav";
FILE *fp = popen(cmd.c_str(), "r");
fprintf(stderr, "cmd:%s", cmd.c_str());
if (fp != NULL) {
    char output[2048] = {0};
    while (fgets(output, sizeof(output), fp) != NULL) {
        int len = strlen(output);
        if (output[len - 1] == '\n') {
            output[len - 1] = 0x00;
        }
        fprintf(stderr, ":%s", output);
    }
    pclose(fp);
   fp = NULL;
} else {
    return -1;
}


  


  2 My question

  


  I find this rm commond can not release the space, as I get different results from df and du, the result from du smaller than result from df.
I use lsof | grep deleted and get some results like this :

  


  audioServer ... 11510667 /audio_folder/origin.wav (deleted)

  


  I wonder it because the server is not closed and it holds the handle of the deleted file, so that the space is not released.

  


  3 Expected

  


  How can I release the space without close the server ? Should I close the handle of origin audio file ? but I do not have the handle, I just send this file to ffmpeg and get converted file.