Function ExecuteFfmpeg

tensorflow/contrib/ffmpeg/default/ffmpeg_lib.cc:123–133

}

[[noreturn]] int ExecuteFfmpeg(const std::vector<string>& args) {
  std::vector<char*> args_chars;
  std::transform(args.begin(), args.end(), std::back_inserter(args_chars),
                 [](const string& s) { return const_cast<char*>(s.c_str()); });
  args_chars.push_back(nullptr);
  ::execvp(kFfmpegExecutable, args_chars.data());
  // exec only returns on error.
  const int error = errno;
  LOG(ERROR) << "FFmpeg could not be executed: " << strerror(error);
  ::_exit(error);
}

// Reads a PCM file using signed little endian 16-bit encoding (s16le).
std::vector<float> ReadPcmFile(const string& filename) {