write_header()

bool MayaFlux::IO::FFmpegMuxContext::write_header

(

)

Write the container header to the output file.

Must be called after all stream contexts (audio, video, subtitle, etc.) have been opened and have set their codec parameters on their AVStream. Exactly one call is valid per open(); calling twice is an error.

Returns

True on success.

Definition at line 101 of file FFmpegMuxContext.cpp.

{
    if (!format_context) {
        m_last_error = "write_header called on unopened context";
        return false;
    }
    if (m_header_written) {
        m_last_error = "write_header called more than once";
        return false;
    }
 
    int ret = avformat_write_header(format_context, nullptr);
    if (ret < 0) {
        char errbuf[AV_ERROR_MAX_STRING_SIZE];
        av_strerror(ret, errbuf, sizeof(errbuf));
        m_last_error = std::string("avformat_write_header failed: ") + errbuf;
        return false;
    }
 
    m_header_written = true;
    return true;
}

References format_context, m_header_written, and m_last_error.

Referenced by MayaFlux::IO::SoundFileWriter::worker_loop(), and MayaFlux::IO::VideoFileWriter::worker_loop().

Here is the caller graph for this function: