Originally committed as revision 6982 to svn://svn.ffmpeg.org/ffmpeg/trunk
AVCodecContext *codec; /* codec context */
/**
* real base frame rate of the stream.
+ * this is the lowest framerate with which all timestamps can be
+ * represented accurately (its the least common multiple of all
+ * framerates in the stream), Note, this value is just a guess!
* for example if the timebase is 1/90000 and all frames have either
* approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
*/