Ut Video Codec Suite 6.1.0 readme (English)

Copyright Notice

Ut Video Codec Suite
Copyright © 2008-2009 UMEZAWA Takeshi

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Overview

Ut Video Codec Suite is a lossless video codec for Windows, which is implemented as a VCM codec (also called "VfW codec").

Environment

Minimum requirement

OS

Windows XP or later

CPU

i686-compatible CPU with SSE2 support
(e.g. Pentium 4 or later)

Version history

Version 6.1.0

New features

• common: Add option to set frame divide count to # of logical processors.

Version 6.0.2

Others

• Fix packaging.

Version 6.0.1

Others

• DLL is now statically-linked rather than dynamically-linked.

Version 6.0.0

New features

• common: Add support for interlace video.

Bug fixes

• ULY0: Codec may crash if video's height is greater than its width.

Version 5.3.1

Bug fixes

• ULY0: fixed frame dividing method.

Version 5.3.0

New features

• ULY0: Add support for YUY2 input when encoding. (but low speed)
• ULY0: Add support for YUY2 output when decoding. (but low speed)

version 5.2.3

Bug fixes

• common: rarely outputs broken frame when encoding.

Version 5.2.2

Others

• Fix packaging.

Version 5.2.1

Others

• Fix packaging.

Version 5.2.0

New features

• ULY2: Add support for RGB32 input when encoding.
• ULY0: Add support for RGB32 input when encoding. (but low speed)
• ULY0: Add support for RGB32 output when decoding. (but low speed)

Version 5.1.2

Others

• Fix packaging.

version 5.1.1

Bug fixes

• ULY0: Size (number of bytes) of image may not be set correctly when decoding. This bug exists only in ULY0.

Version 5.1.0

New features

• ULY0: Add support for RGB24 input when encoding. (but low speed)
• ULY0: Add support for RGB24 output when decoding. (but low speed)

Version 5.0.0

New features

• Add codec for YUV420 (FOURCC: ULY0).

Others

• Switch default prediction mode to "Predict left".
• ULY2: Width now must be multiple of two.

Version 4.1.0

Performance Improvements

• common: Speed up encoding just a little.
• common: Speed up decoding just a little.

Version 4.0.2

Others

• ULRG: For the safety, set 255 to the field that might be interpreted as alpha channel when decoding.
• Common: Set input effective bit count to output biBitCount field when encoding.

Version 4.0.1

Others

• Fix packaging.

Version 4.0.0

New features

• Add codec for RGBA (FOURCC: ULRA).

Version 3.8.0

New features

• common: Add "Predict left" intra-frame prediction method. According to my measurement, compared to existing implementation ("Predict median"), approximately same encoding speed, 10% lower compresstion ratio (10% larger file size) and 50% faster decoding speed (30%+ shorter decoding time).

Version 3.7.0

Performance Improvements

• common: Speed up decoding. 9% if Core 2.
• ULY2: Speed up encoding from RGB24. 9% if Core 2.

Version 3.6.0

Performance Improvements

• ULY2: Speed up encoding from RGB24. 42% if Core 2.

Version 3.5.0

New features

• ULY2: Add support for RGB32 output when decoding. Assembly language version is also available.

Bug fix

• ULY2: When encoding from RGB24, trash appears on right edge if width is not multiple of four.

Version 3.4.0

New features

• ULY2: Add support for RGB24 input when encoding. (but low speed)

Bug fixes

• ULY2: Output vertically flipped frames on some environment when decoding to RGB32, because of ignorance of sign of biHeight.

Version 3.3.1

Bug fixes

• Common: Encoder crashes with some video editing and/or capture software.

Others

• Changed title string of configuration dialog.
• Add version string to "About" dialog.

Version 3.3.0

Performance Improvements

• Common: Speed up decoding. 20% if Core 2.
• Common: Speed up encoding. 8% if Core 2.
• ULY2: Speed up decoding to RGB32. 47% if Core 2, including preceding common speedup.

Bug fixes

• Common: Do not output error though starting encoding/decoding with format that cannot be processed.

Version 3.2.0

New features

• ULY2: Add support for RGB32 output when decoding. (but low speed)

Bug fixes

• ULRG: fixed frame dividing method. Due to this fix, ULRG lost compatibility if frame divide count is not 1.

Version 3.1.0

New features

• ULY2: Add support for YUYV, YUNV, UYVY, UYNV, YVYU and VYUY.
• ULRG: Add support for RGB32.

Buf fixes

• ULRG: WMP crashes for ULRG-encoded files.

Version 3.0.0

• Add codec for RGB (FOURCC: ULRG).

Version 2.2.0

• Replaced many routines with assembly language version.

Version 2.1.0

• Add support for multithreading.

Version 2.0.0

• Process frames after divided into bands.

Version 1.1.3

First public release