May 2007 - NUT-devel - lists.mplayerhq.hu

[nut]: r495 - docs/nut.txt
by diego 31 May '07

31 May '07

Author: diego Date: Thu May 31 16:15:48 2007 New Revision: 495 Log: Improve confusing wording. Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Thu May 31 16:15:48 2007 @@ -885,9 +885,9 @@ Headers may be repeated, but if they are together and repeated headers MUST be identical. Each set of repeated headers not at the beginning or end of the file SHOULD -be stored at the earliest possible position after 2^x where x is an integer -and the end of the file. So the headers may be repeated at 4102 if that is -the closest position after 2^12=4096 at which the headers can be placed. +be stored at the earliest possible position after 2^x where x is an integer. +So the headers may be repeated at 4102 if that is the closest position after +2^12=4096 at which the headers can be placed. Note: This allows an implementation reading the file to locate backup headers in O(log filesize) time as opposed to O(filesize).

1 0

[nut]: r494 - docs/nut.txt
by diego 31 May '07

31 May '07

Author: diego Date: Thu May 31 16:14:25 2007 New Revision: 494 Log: wording clarifications Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Thu May 31 16:14:25 2007 @@ -602,7 +602,7 @@ flags[frame_code], frame_flags (v) presentation. (EOR) 3 FLAG_CODED_PTS If set, coded_pts is in the frame header. 4 FLAG_STREAM_ID If set, stream_id is coded in the frame header. - 5 FLAG_SIZE_MSB If set, data_size_msb at the frame header, + 5 FLAG_SIZE_MSB If set, data_size_msb is coded in the frame header, otherwise data_size_msb is 0. 6 FLAG_CHECKSUM If set, the frame header contains a checksum. 7 FLAG_RESERVED If set, reserved_count is coded in the frame header. @@ -925,8 +925,8 @@ demuxer (non-normative): In the absence of a valid header at the beginning, players SHOULD search for backup headers starting at offset 2^x; for each x players SHOULD end their -search at a particular offset when any startcode (including a syncpoint) is -found. +search at a particular offset when any startcode (including the syncpoint +startcode) is found. Seeking without an index (non-normative):

1 0

[nut]: r493 - docs/nut.txt
by diego 31 May '07

31 May '07

Author: diego Date: Thu May 31 16:11:58 2007 New Revision: 493 Log: wording clarifications Modified: docs/nut.txt Modified: docs/nut.txt ============================================================================== --- docs/nut.txt (original) +++ docs/nut.txt Thu May 31 16:11:58 2007 @@ -612,7 +612,7 @@ flags[frame_code], frame_flags (v) EOR frames MUST be zero-length and must be set keyframe. All streams SHOULD end with EOR, where the pts of the EOR indicates the end presentation time of the final frame. - An EOR set stream is unset by the first content frames. + An EOR set stream is unset by the first content frame. EOR can only be unset in streams with zero decode_delay . FLAG_CHECKSUM MUST be set if the frame's data_size is strictly greater than 2*max_distance or the difference abs(pts-last_pts) is strictly greater than @@ -795,7 +795,7 @@ chapter_id (s) The ID of the chapter this packet applies to. If zero, the packet applies to the whole file. Positive chapter_id values represent real chapters and MUST NOT overlap. - A negative chapter_id indicates a sub region of the file and not a real + A negative chapter_id indicates a region of the file and not a real chapter. chapter_id MUST be unique to the region it represents. chapter_id n MUST NOT be used unless there are at least n chapters in the file.

1 0

[nut]: r492 - homepage/index.html
by diego 31 May '07

31 May '07

Author: diego Date: Thu May 31 15:56:41 2007 New Revision: 492 Log: proper doctype declaration Modified: homepage/index.html Modified: homepage/index.html ============================================================================== --- homepage/index.html (original) +++ homepage/index.html Thu May 31 15:56:41 2007 @@ -1,4 +1,4 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head>

1 0

new NUT repository
by Diego Biurrun 24 May '07

24 May '07

I've created a new NUT repository that contains the old NUT repository and the specification files (oggless-xiph-codecs.txt, nut.txt, mpcf.txt, mncf.txt) each in a separate directory. svn://svn.mplayerhq.hu/nut.merged/ http://svn.mplayerhq.hu/nut.merged/ Make sure it works as expected. If it does we can do away with the old one and remove the specification files from the MPlayer repository. enjoy Diego

4 11

r23260 - in trunk/DOCS/tech: nut.txt oggless-xiph-codecs.txt
by diego 08 May '07

08 May '07

Author: diego Date: Tue May 8 10:37:52 2007 New Revision: 23260 Log: These files are now in the separate NUT repository. Removed: trunk/DOCS/tech/nut.txt Changes in other areas also in this revision: Removed: trunk/DOCS/tech/oggless-xiph-codecs.txt

1 0

header packing for xiph codecs
by Ralph Giles 08 May '07

08 May '07

At some point we talked about there being a general need to pack the necessary decoder initialization headers for codecs like Vorbis and Theora into a single binary blob, and how it would be nice if there were some standard way to do that. I've been pushing for something like that in the RTP payload specs, which are going through a new round. So, what do you think of the following: - 24 bit "unique id" marking the header for reference - number of headers, encoded as a variable-length unsigned integer, using the 'v' method from the nut spec - for each header: * length of the header in bytes, encoded using the 'v' method * header data, padded out to the nearest byte boundary Comments please, -r

3 3