Ut Video Codec Suite 3.4.0 readme (English)

Copyright Notice

Ut Video Codec Suite
Copyright © 2008 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"). It can currently encode YUV422 and RGB sources.

Environment

Minimum requirement

OS

Windows XP or later

CPU

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

Microsoft Visual C++ 2005 SP1 Redistributable Package (x86) is also required.

Implementation goal

• Realtime high definition capture with Core 2 Duo class CPU
• Better compression ratio than Huffyuv
• Near compression ratio as Lagarith, if possible

Achievement

• Enough speed for realtime high definition capture because of multithreading and assembly language.
• Usually better compression ratio than Huffyuv (Predict median) for progressive sources.
• May worse compression ratio than Huffyuv for interlace sources whose height is greater than 288 pixels.
• Usually worse compression ratio than Lagarith, but rarely better.

Version history

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