问GCC -如何编译FFMpeg与FLV1 (又名H.263)，MP3 (格式和编解码)和FLV (容器格式)？

EN

multiplexer::multiplexer(std::string container)
{
        av_register_all();

        this->format_context = avformat_alloc_context();
        if (this->format_context == NULL)
        {
                std::cout << "Multiplexer: format context is empty." << std::endl;
                throw internal_exception();
        }

        this->format_context->oformat = av_guess_format(container.c_str(), NULL, NULL);
        if (this->format_context->oformat == NULL)
        {
                std::cout << "Multiplexer: invalid container format (" << container << ")." << std::endl;
                throw internal_exception();
        }
}