extern void set_backtrace_file (boost::filesystem::path);
extern dcp::FrameInfo read_frame_info (FILE* file, int frame, Eyes eyes);
extern void write_frame_info (FILE* file, int frame, Eyes eyes, dcp::FrameInfo info);
-extern int64_t video_frames_to_audio_frames (VideoFrame v, float audio_sample_rate, float frames_per_second);
extern std::map<std::string, std::string> split_get_request (std::string url);
extern std::string video_mxf_filename (boost::shared_ptr<dcp::PictureMXF> mxf);
extern std::string audio_mxf_filename (boost::shared_ptr<dcp::SoundMXF> mxf);