Motion Pixels - Revision history

Compn: remove link from ai bots

2026-01-28T04:49:39Z

remove link from ai bots

← Older revision		Revision as of 21:49, 27 January 2026
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	** MVI2 Movie CD samples: archive.org/download/capers_202304/CAPERS.AVI		** MVI2 Movie CD samples: archive.org/download/capers_202304/CAPERS.AVI
	https://archive.org/search?query=moviecd		https://archive.org/search?query=moviecd
	** Possible decoder ~~https://~~git.nihav.org/?p=nihav.git;a=tree;f=nihav-misc/src/codecs		** Possible decoder git.nihav.org/?p=nihav.git;a=tree;f=nihav-misc/src/codecs

	== Introduction ==		== Introduction ==

Compn: why would you even use rust ?

2026-01-28T04:48:12Z

why would you even use rust ?

← Older revision		Revision as of 21:48, 27 January 2026
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	** MVI2 Movie CD samples: archive.org/download/capers_202304/CAPERS.AVI		** MVI2 Movie CD samples: archive.org/download/capers_202304/CAPERS.AVI
	https://archive.org/search?query=moviecd		https://archive.org/search?query=moviecd
			** Possible decoder https://git.nihav.org/?p=nihav.git;a=tree;f=nihav-misc/src/codecs

	== Introduction ==		== Introduction ==

Compn: some samples on archive

2026-01-28T04:30:21Z

some samples on archive

← Older revision		Revision as of 21:30, 27 January 2026
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	** Movie CD Win32 Codecs: [http://samples.mplayerhq.hu/drivers32/motionpixels/ http://samples.mplayerhq.hu/drivers32/motionpixels/]		** Movie CD Win32 Codecs: [http://samples.mplayerhq.hu/drivers32/motionpixels/ http://samples.mplayerhq.hu/drivers32/motionpixels/]
	** {{DexvertSamples\|video/motionPixelsMVI}}		** {{DexvertSamples\|video/motionPixelsMVI}}
			** MVI2 Movie CD samples: archive.org/download/capers_202304/CAPERS.AVI
			https://archive.org/search?query=moviecd


	== Introduction ==		== Introduction ==

Sembiance: samples

2026-01-03T12:32:19Z

samples

← Older revision		Revision as of 05:32, 3 January 2026
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	** Movie CD: [http://samples.mplayerhq.hu/drivers32/motionpixelsmoviecd/ http://samples.mplayerhq.hu/drivers32/motionpixelsmoviecd/]		** Movie CD: [http://samples.mplayerhq.hu/drivers32/motionpixelsmoviecd/ http://samples.mplayerhq.hu/drivers32/motionpixelsmoviecd/]
	** Movie CD Win32 Codecs: [http://samples.mplayerhq.hu/drivers32/motionpixels/ http://samples.mplayerhq.hu/drivers32/motionpixels/]		** Movie CD Win32 Codecs: [http://samples.mplayerhq.hu/drivers32/motionpixels/ http://samples.mplayerhq.hu/drivers32/motionpixels/]
			** {{DexvertSamples\|video/motionPixelsMVI}}

	== Introduction ==		== Introduction ==

Kostya: /* Common things and differences */ add forgotten pixel 0 mention

2025-08-16T09:43:09Z

Common things and differences: add forgotten pixel 0 mention

← Older revision		Revision as of 02:43, 16 August 2025
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	* low-resolution areas map (only when the feature is enabled)		* low-resolution areas map (only when the feature is enabled)
	* Huffman codes description for deltas		* Huffman codes description for deltas
			* top left pixel RGB value (in there are delta codes and top left pixel is marked for normal delta decoding)
	* number of delta codes for vertical prediction and first field (if there are delta codes)		* number of delta codes for vertical prediction and first field (if there are delta codes)
	* number of delta codes for the second field (ditto)		* number of delta codes for the second field (ditto)

Kostya: clarify some flags and be done with it

2025-08-15T13:12:10Z

clarify some flags and be done with it

← Older revision		Revision as of 06:12, 15 August 2025
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	* 0..3 (0x000F) - colourspace Format (see below)		* 0..3 (0x000F) - colourspace Format (see below)
	* 4 (0x0010) - MVI2.2 only		* 4 (0x0010) - seems to be recognised but not used by the decoder (MVI2.2 only)
	* 5 (0x0020) - MVI2.2 only		* 5 (0x0020) - alternative output mode (MVI2.2 only)
	* 6 (0x0040) - MVI2.2 only		* 6 (0x0040) - seems to be intra-only mode where only intra frames are decoded and inter frames merely repeat them (MVI2.2 only)
	* 7 (0x0080) - MVI2.2 ~~only~~		* 7 (0x0080) - MVI2.2 mode
	* 8 (0x0100) - MVI2.2 ~~only~~		* 8 (0x0100) - still-frame (or golden frame) mode for MVI2.2
	* 9 (0x0200) - MVI2.1 mode		* 9 (0x0200) - MVI2.1 mode
	* 10 (0x0400) - frame cropping enabled (MVI2 only)		* 10 (0x0400) - frame cropping enabled (MVI2 only)
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
	~~[[Category:Undiscovered Video Codecs]]~~
	~~[[Category:Undiscovered Game Formats]]~~
	[[Category:Game Formats]]		[[Category:Game Formats]]
	[[Category:Formats missing in MPlayer]]		[[Category:Formats missing in MPlayer]]

Kostya: more about deltas

2025-08-15T12:53:25Z

more about deltas

← Older revision		Revision as of 05:53, 15 August 2025
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	Please note that both of the parts in the first frame still contain the golden frame map.		Please note that both of the parts in the first frame still contain the golden frame map.

			=== Delta decoding modes ===

			Deltas are coded as values in the range -7..7. Since sometimes larger values are needed, there are two ways to deal with it. Motion Pixels before 2.1 used a rule that if delta value is -7 or 7 then next delta value should be doubled before use (and if its original value is -7 or 7 then the next delta value as well etc etc). Smooth delta mode operates differently: if delta value is -7 or 7 then add doubled next delta value to the result (and keep doing it while additional delta values are -7 or 7).

	=== Low-resolution mode ===		=== Low-resolution mode ===
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	==== Deltas Bundle ====		==== Deltas Bundle ====

	'~~''TODO'''~~		Deltas start with 4-bit code telling how many unique delta values are being coded. Zero means no deltas are present at all, one value means next four bit contain delta value plus seven and all deltas in the frame are the same. Otherwise there's 4-bit value telling the suggested number of bits to look up during Huffman decoding followed by symbol values (delta value plus seven) and bit-coded Huffman tree shape (0 - this is a leaf; 1 - node has children, read description for it).

			Then there are two numbers of deltas per field, using 18 or 19 bits (depending on whether image is larger than 320*240 or not) and the actual delta values (when there are two or more unique delta values).

	==== Assembling the Frame ====		==== Assembling the Frame ====
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	* perform prediction for even lines using deltas from the second part (skip if there are no deltas)		* perform prediction for even lines using deltas from the second part (skip if there are no deltas)

	~~'''TODO'''~~		Please note that while old DOS format used sequential line numbers so field 0 consisted of lines 0,2,4,... newer formats decode lines in permuted order. So for most formats field 0 is lines 1,3,5,... and for 4x4 mode lines for field 0 are decoded in this order: 3,1,7,5,11,9,...

			Delta prediction is simple: for the line (or column) skip not predicted pixels, taking last of them as a new predictor, convert it from RGB to YUV, add delta for Y and optionally U and V components, put pixel converted to RGB on frame. Pixels in the same block use the same chroma values. The rules for which pixel is supposed to have U and V deltas depend on pixel position, subsampling mode, low-res mode being employed or not, and codec version.

	== Games Using Motion Pixels ==		== Games Using Motion Pixels ==

Kostya: fill some information

2025-08-15T10:47:40Z

fill some information

Show changes

Multimedia Mike: found another game that uses Motion Pixels

2023-10-06T05:11:16Z

found another game that uses Motion Pixels

← Older revision		Revision as of 22:11, 5 October 2023
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	== Introduction ==		== Introduction ==

	Motion Pixels version 1 (MVI1) was used in a ~~single PC game, [http://www.mobygames.com/game/windows/treasure-quest Treasure Quest]~~ while version 2 (MVI2) was used in a number of Movie CDs. All of these items were published by Sirius Publishing and the Motion Pixels codec is believed to still be owned by the company's CEO, Richard Gnant.		Motion Pixels version 1 (MVI1) was used in a few video games while version 2 (MVI2) was used in a number of Movie CDs. All of these items were published by Sirius Publishing and the Motion Pixels codec is believed to still be owned by the company's CEO, Richard Gnant.

	MVI belongs to the "old-school" family of video codecs and relies on interframe differences and adaptive delta-coding for horizontal lines of the picture. Delta coefficients are additionally [[Huffman\|Huffman-packed]]. For better compression at the cost of picture quality additional colorspace downsampling may be used. MVI2 adds smoother delta-coding and the ability to dynamically change downsampling for each frame.		MVI belongs to the "old-school" family of video codecs and relies on interframe differences and adaptive delta-coding for horizontal lines of the picture. Delta coefficients are additionally [[Huffman\|Huffman-packed]]. For better compression at the cost of picture quality additional colorspace downsampling may be used. MVI2 adds smoother delta-coding and the ability to dynamically change downsampling for each frame.
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	==== Assembling the Frame ====		==== Assembling the Frame ====

	==~~= TO DO =~~==		== Games Using Motion Pixels ==
			* [https://www.mobygames.com/game/windows/treasure-quest Treasure Quest]
			* [https://www.mobygames.com/game/25426/apollo-18-the-moon-missions/ Apollo 18: The Moon Missions]

	[[Category:Video Codecs]]		[[Category:Video Codecs]]

Compn at 15:14, 8 March 2009

2009-03-08T15:14:43Z

← Older revision		Revision as of 08:14, 8 March 2009
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	[[Category:Undiscovered Game Formats]]		[[Category:Undiscovered Game Formats]]
	[[Category:Game Formats]]		[[Category:Game Formats]]
			[[Category:Formats missing in MPlayer]]