+bool is_sane_fps(AVRational time_base)\r
+{\r
+ double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
+ return fps > 20.0 && fps < 65.0;\r
+}\r
+\r
+void fix_meta_data(AVFormatContext& context)\r
+{\r
+ auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
+ auto audio_index = av_find_best_stream(&context, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);\r
+\r
+ if(video_index < 0)\r
+ return;\r
+\r
+ auto& video_context = *context.streams[video_index]->codec;\r
+ auto& video_stream = *context.streams[video_index];\r
+ \r
+ if(boost::filesystem2::path(context.filename).extension() == ".flv")\r
+ {\r
+ try\r
+ {\r
+ auto meta = read_flv_meta_info(context.filename);\r
+ double fps = boost::lexical_cast<double>(meta["framerate"]);\r
+ video_context.time_base.num = 1000000;\r
+ video_context.time_base.den = static_cast<int>(fps*1000000.0);\r
+ video_stream.nb_frames = static_cast<int64_t>(boost::lexical_cast<double>(meta["duration"])*fps);\r
+ }\r
+ catch(...){}\r
+ }\r
+ else\r
+ {\r
+ if(video_stream.nb_frames == 0)\r
+ video_stream.nb_frames = video_stream.duration;\r
+\r
+ if(!is_sane_fps(video_context.time_base))\r
+ { \r
+ if(video_context.time_base.num == 1)\r
+ video_context.time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(video_context.time_base.den)))-1)); \r
+\r
+ if(!is_sane_fps(video_context.time_base) && audio_index > -1)\r
+ {\r
+ auto& audio_context = *context.streams[audio_index]->codec;\r
+ auto& audio_stream = *context.streams[audio_index];\r
+\r
+ double duration_sec = audio_stream.duration / static_cast<double>(audio_context.sample_rate);\r
+ \r
+ video_context.time_base.num = static_cast<int>(duration_sec*100000.0);\r
+ video_context.time_base.den = static_cast<int>(video_stream.nb_frames*100000);\r
+ }\r
+ }\r
+ }\r
+\r
+ double fps = static_cast<double>(video_context.time_base.den) / static_cast<double>(video_context.time_base.num);\r
+\r
+ double closest_fps = 0.0;\r
+ for(int n = 0; n < core::video_format::count; ++n)\r
+ {\r
+ auto format = core::video_format_desc::get(static_cast<core::video_format::type>(n));\r
+\r
+ double diff1 = std::abs(format.fps - fps);\r
+ double diff2 = std::abs(closest_fps - fps);\r
+\r
+ if(diff1 < diff2)\r
+ closest_fps = format.fps;\r
+ }\r
+ \r
+ video_context.time_base.num = 1000000;\r
+ video_context.time_base.den = static_cast<int>(closest_fps*1000000.0);\r
+}\r
+\r