int64_t pos; ///< byte position in stream, -1 if unknown
/**
- * This is the time difference in stream timebase units from the pts at which
- * the output from the decoder has converged independent from the availability
+ * This is the time difference in stream timebase units from the pts of this
+ * packet to the point at which the output from the decoder has converged
+ * independent from the availability
* of previous frames (that is the frames are virtually identical no matter
* if decoding started from the very first frame or from this keyframe).
* is AV_NOPTS_VALUE if unknown.
+ * This field is not the display duration of the current packet.
*
* The purpose of this field is to allow seeking in streams that have no
* keyframes in the conventional sense. It corresponds to the