Author: diego Date: Sun Feb 3 17:29:59 2008 New Revision: 572 Log: spelling/wording Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Sun Feb 3 17:29:59 2008 @@ -54,18 +54,19 @@ keyframe A keyframe is a frame from which you can start decoding, a more exact definition is below - A frame in a stream is a keyframe if and only if all of the following are true - * Decoding can successfully begin using any standard compliant decoder without - requireing access to prior frames. - * Begining decoding instead at a subsequent frame would cause fewer frames + A frame in a stream is a keyframe if and only if all of the following + are true: + * Decoding can successfully begin using any standard-compliant decoder + without requiring access to prior frames. + * Starting decoding at a subsequent frame would cause fewer frames to be decoded successfully. - successfull decoding here means that the specific frame is virtually - identical to what one would get if decoding would have begun from the very - first frame - Note, "virtually identical" here is used instead of "identical" to allow + Successful decoding here means that the specific frame is virtually + identical to what one would get if decoding would have begun from + the very first frame. + Note, "virtually identical" is used here instead of "identical" to allow codecs which converge toward the same output when started from different - points but dont neccessarily ever reach exactly identical output. + points but do not necessarily ever reach exactly identical output. Every frame which is marked as a keyframe MUST be a keyframe according to the definition above, a muxer MUST mark every frame it knows is a keyframe