Recherche avancée

Sur d’autres sites (6894)

• avformat/hlsenc : Add deinit function

  15 décembre 2019, par Andreas Rheinhardt

  avformat/hlsenc : Add deinit function
  This fixes memleaks in instances such as :
  
  a) When an allocation fails at one of the two places in hls_init() where
  
  the error is returned immediately without goto fail first.
  
  b) When an error happens when writing the header.
  
  c) When an allocation fails at one of the three places in
  
  hls_write_trailer() where the error is returned immediately without goto
  
  fail first.
  
  d) When one decides not to write the trailer at all (e.g. because of
  
  errors when writing packets).
  
  Furthermore, it removes code duplication and allows to return
  
  immediately, without goto fail first.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/hlsenc.c

• Update docs.

  10 septembre 2013, par XhmikosR

  Update docs.
  Use code syntax in more places and link to jquery.
  

• How to get EAGAIN error from av_read_frame function in libavformat ?

  10 août 2017, par Константин Вуколов

  I can’t obtain EAGAIN error from av_read_frame function when I open context from pipe.
  I use boost::asio for managing connections to unix sockets and passing native socket descriptor to avformat_open_input.
  For correct managing i need to create kevent to get new data from socket and not to block thread until this event.

  here is my example :

  #include <iostream>
  
  #include <boost></boost>asio.hpp>
  
  extern "C"{
  
  #include <libavformat></libavformat>avformat.h>
  
  }
  
  
  
  void on_accepted(std::shared_ptr socket, const boost::system::error_code err){
  
    if(err){
  
        std::cout &lt;&lt; "Error while accept " &lt;&lt; err &lt;&lt; std::endl;
  
        return;
  
    }
  
    socket->native_non_blocking(true);
  
    std::string path = "pipe:" + std::to_string(socket->native_handle());
  
    AVFormatContext* context = avformat_alloc_context();
  
    context->flags |= AVFMT_FLAG_NONBLOCK;
  
    auto open_result = avformat_open_input(&amp;context, path.c_str(), nullptr, nullptr);
  
    AVPacket* packet = av_packet_alloc();
  
    int ret;
  
    while((ret = av_read_frame(context, packet)) >= 0){
  
        std::cout &lt;&lt; "Packet received" &lt;&lt; std::endl;
  
    }
  
    if(ret == EAGAIN || ret == AVERROR(EAGAIN)){
  
        std::cout &lt;&lt; "EAGAIN got" &lt;&lt; std::endl;
  
    }
  
    else{
  
        char buf[255];
  
        av_strerror( ret, buf, sizeof(buf));
  
        std::cout &lt;&lt; "Error got " &lt;&lt; buf &lt;&lt; std::endl;
  
    }
  
    av_packet_free(&amp;packet);
  
    avformat_free_context(context);
  
  }
  
  
  
  int main(){
  
    av_register_all();
  
    boost::asio::io_service io_service;
  
    ::unlink("/usr/local/sockets/test");
  
    boost::asio::local::stream_protocol::acceptor acceptor{io_service, "/usr/local/sockets/test"};
  
    acceptor.set_option(boost::asio::socket_base::reuse_address(true));
  
    auto socket = std::make_shared( io_service);
  
    acceptor.async_accept(*socket,
  
            std::bind(on_accepted, socket, std::placeholders::_1)
  
        );
  
    std::cout &lt;&lt; "Start accepting" &lt;&lt; std::endl;
  
    io_service.run();
  
  }
  
  </iostream>

  As i see in stack trace, ffmpeg get EAGAIN error and sends read call again.

  read(0x7, "\0", 0x8000)      = -1 Err#35
  
  read(0x7, "\0", 0x8000)      = -1 Err#35
  
  read(0x7, "\0", 0x8000)      = -1 Err#35
  
  read(0x7, "\0", 0x8000)      = -1 Err#35
  
  read(0x7, "\0", 0x8000)      = -1 Err#35
  
  read(0x7, "\0", 0x8000)      = -1 Err#35

  How to get EAGAIN error in my application ?