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• ffmpeg memory usage, or memory leaks

  26 janvier, par happycoding-boy

  I'v write a simple program to get audio waveform data, which using ffmpeg version 6.1. And program works fine. But I get a problem : when program running at begin, system report using about 6MB memory, but when I call the function and cleanup the resouce alloced, system report about 9MB memory used. In my theory, after cleanup, it should be 6MB again. [I'm sure, I freed the AVPacket when read stream, and AVFrame for decoding.] My question is : Is this normal or not ?

  


  int main(int argc, char *argv[])
{
    // breakpoint here: ~= 6MB
    get_audio_waveform();
    // breakpoint here: ~= 9MB
}


  


  The ffmpeg struct I used :

  


  AVFormatContext*    p_input_fmt_ctx = nullptr;
AVCodecContext*     p_input_cdc_ctx = nullptr;
SwrContext*         p_resampler_ctx = nullptr;
AVAudioFifo*        p_audio_fifo    = nullptr;
uint8_t**           p_converted_input = nullptr;
uint8_t**           p_converted_output = nullptr;


  


  The cleanup func :

  


  void _cleanup()
{
    avformat_close_input(&p_input_fmt_ctx);
    avcodec_free_context(&p_input_cdc_ctx);
    swr_free(&p_resampler_ctx);
    
    if (p_audio_fifo)
    {
        av_audio_fifo_reset(p_audio_fifo);
        av_audio_fifo_free(p_audio_fifo);
        p_audio_fifo = nullptr;
    }
    
    if (p_converted_input)
    {
        av_freep(&p_converted_input[0]);
        free(p_converted_input);
        p_converted_input = nullptr;
    }
    
    if (p_converted_output)
    {
        av_freep(&p_converted_output[0]);
        free(p_converted_output);
        p_converted_output = nullptr;
    }
}


  


  In my opinion，If this function have about 3MB memory leaks6MB. when I run this function 5-times, it should be about 15MB memory leaks.6MB. But when I run this function 5-times. After that, system just reports about 10-11 memory used. I doubt wheather program uses runtime library (i.e. libc or equivalent) and the library allocates some memory for own needs？ I do not known which step is wrong！ :(

  


• Adding loop video to sound ffmpeg

  19 décembre 2017, par Cuviline

  i start working with ffmpeg, and here my first doubt :

  I have one sound file, example.mp3 (1 min duration).
  I want add a loop video, example.mp4 ( x sec duration).

  I want generate 1 min mp4 video and loop this video 3 times in this case, but this could be dynamic.

  Its posible do this with ffmpeg ?

  Thanks in advance

• android ffmpeg .so download [closed]

  19 janvier 2015, par Jas

  Anybody knows from where to get compiled .so FFMPEG library for Android ?

  I tried thousand of times to compile the FFMPEG manually on windows-7 using Android NDK
  but never succeeded.

  So I think it’s better to use precompiled lib as I’m already using the same same technolgy that used in :
  https://github.com/guardianproject/SSCVideoProto

  But the ffmpeg lib in this project is very old.

  Any help is much appreciated.......