Metal Gear Solid VP3 - Revision history

Pbm: no more missing

2012-07-19T02:06:06Z

no more missing

← Older revision		Revision as of 19:06, 18 July 2012
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	[[Category:Game Formats]]		[[Category:Game Formats]]
	~~[[Category:Formats missing in FFmpeg]]~~

Multimedia Mike: /* File Format */ collapse 2 unknown fields into one

2011-08-04T18:35:00Z

File Format: collapse 2 unknown fields into one

← Older revision		Revision as of 11:35, 4 August 2011
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	bytes 20-23 video width in pixels		bytes 20-23 video width in pixels
	bytes 24-27 video height in pixels		bytes 24-27 video height in pixels
	bytes 28~~-35 unknown~~		bytes 28-39 unknown
	~~bytes 36~~-39 unknown
	bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)		bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)
	bytes 44-63 unknown		bytes 44-63 unknown

Multimedia Mike: example frame rate

2011-08-04T04:12:43Z

example frame rate

← Older revision		Revision as of 21:12, 3 August 2011
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	bytes 0-3 close to the total size of the file, but not exact and should not be used		bytes 0-3 close to the total size of the file, but not exact and should not be used
	bytes 4-11 unknown		bytes 4-11 unknown
	bytes 12-15 ~~framerate~~, expressed as a 32-bit IEEE floating point number		bytes 12-15 frame rate, expressed as a 32-bit IEEE floating point number
	bytes 16-19 total number of video frames		bytes 16-19 total number of video frames
	bytes 20-23 video width in pixels		bytes 20-23 video width in pixels
Line 32:		Line 32:

	The remainder of the chunks contain video data compressed with the VP3 video codec.		The remainder of the chunks contain video data compressed with the VP3 video codec.

			The frame rate is stored as a 32-bit IEEE floating point number. A common value is 0x41F00000 which represents 30.0 frames per second.

	[[Category:Game Formats]]		[[Category:Game Formats]]
	[[Category:Formats missing in FFmpeg]]		[[Category:Formats missing in FFmpeg]]

Multimedia Mike: figured out enough of the format to declare this "discovered"

2011-08-04T04:07:55Z

figured out enough of the format to declare this "discovered"

← Older revision		Revision as of 21:07, 3 August 2011
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	* Samples: http://samples.mplayerhq.hu/game-formats/mgs1-vp3/		* Samples: http://samples.mplayerhq.hu/game-formats/mgs1-vp3/

	The GameCube version of Konami's [http://www.mobygames.com/game/gamecube/metal-gear-solid-the-twin-snakes Metal Gear Solid: The Twin Snakes], developed by Silicon Knights, uses files that ~~are suspected to~~ contain [[VP3]] video data. Be advised that the file format described here explains files as extracted by [http://sourceforge.net/projects/extractor-gtk Extractor-GTK].		The [[GameCube]] version of Konami's [http://www.mobygames.com/game/gamecube/metal-gear-solid-the-twin-snakes Metal Gear Solid: The Twin Snakes], developed by Silicon Knights, uses video files that contain [[VP3]] video data. The files are packed in large game resource archive formats. Be advised that the file format described here explains files as extracted by [http://sourceforge.net/projects/extractor-gtk Extractor-GTK].

	== File Format ==		== File Format ==
Line 21:		Line 21:

	bytes 0-3 close to the total size of the file, but not exact and should not be used		bytes 0-3 close to the total size of the file, but not exact and should not be used
	bytes 4-19 unknown		bytes 4-11 unknown
			bytes 12-15 framerate, expressed as a 32-bit IEEE floating point number
			bytes 16-19 total number of video frames
	bytes 20-23 video width in pixels		bytes 20-23 video width in pixels
	bytes 24-27 video height in pixels		bytes 24-27 video height in pixels
	bytes 28-35 unknown		bytes 28-35 unknown
	bytes 36-39 ~~possibly the frame rate (18 fps?)~~		bytes 36-39 unknown
	bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)		bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)
	bytes 44-63 unknown		bytes 44-63 unknown

	The remainder of the chunks ~~apparently~~ contain ~~raw VP31~~ data.		The remainder of the chunks contain video data compressed with the VP3 video codec.

	[[Category:Game Formats]]		[[Category:Game Formats]]
	[[Category:Formats missing in FFmpeg]]		[[Category:Formats missing in FFmpeg]]
	~~[[Category:Undiscovered Game Formats]]~~

Alex at 17:37, 24 January 2009

2009-01-24T17:37:50Z

← Older revision		Revision as of 10:37, 24 January 2009
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	bytes 24-27 video height in pixels		bytes 24-27 video height in pixels
	bytes 28-35 unknown		bytes 28-35 unknown
	bytes 36-29 possibly the frame rate (18 fps?)		bytes 36-39 possibly the frame rate (18 fps?)
	bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)		bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)
	bytes 44-63 unknown		bytes 44-63 unknown

Multimedia Mike: updated format

2008-09-22T18:46:54Z

updated format

← Older revision		Revision as of 11:46, 22 September 2008
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	* Samples: http://samples.mplayerhq.hu/game-formats/mgs1-vp3/		* Samples: http://samples.mplayerhq.hu/game-formats/mgs1-vp3/

	The GameCube version of Konami's [http://www.mobygames.com/game/gamecube/metal-gear-solid-the-twin-snakes Metal Gear Solid: The Twin Snakes], developed by Silicon Knights, uses files that are suspected to contain [[VP3]] video data.		The GameCube version of Konami's [http://www.mobygames.com/game/gamecube/metal-gear-solid-the-twin-snakes Metal Gear Solid: The Twin Snakes], developed by Silicon Knights, uses files that are suspected to contain [[VP3]] video data. Be advised that the file format described here explains files as extracted by [http://sourceforge.net/projects/extractor-gtk Extractor-GTK].

	== File Format ==		== File Format ==
	All multi-byte numbers are big-endian. ~~The file header is as follows:~~		All multi-byte numbers are big-endian.

	bytes 0-3 total size of file ~~(number is too long?)~~		The files are comprised of a series of chunks. Each chunk has the following layout:

			bytes 0-3 0x0000000E
			bytes 4-7 total length of the chunk
			bytes 8-11 unknown; might be reserved and set to 0
			bytes 12-15 length of the payload
			bytes 16.. payload

			Note that the chunks are 0-padded to 16-byte boundaries. Thus, the length of the payload + 16 does not necessarily equal the total length of the chunk.

			The first chunk contains header information which has the following format:

			bytes 0-3 close to the total size of the file, but not exact and should not be used
	bytes 4-19 unknown		bytes 4-19 unknown
	bytes 20-23 video width in pixels		bytes 20-23 video width in pixels
Line 17:		Line 29:
	bytes 44-63 unknown		bytes 44-63 unknown

	~~Following~~ the ~~header is~~ data that appears to conform to the [[VP3]] video coding method. It is unknown how the frame data is delimited. VP3 makes no provision for encoding frame length in the bitstream. It's possible that the demuxer and the video decoder in the game are one and the same and that the video decoder parses through data until it has finished a frame and then resets on a byte boundary (or perhaps a multi-byte boundary) to decode the next frame.		The remainder of the chunks apparently contain raw VP31 data.

	[[Category:Game Formats]]		[[Category:Game Formats]]
	[[Category:Formats missing in FFmpeg]]		[[Category:Formats missing in FFmpeg]]
	[[Category:Undiscovered Game Formats]]		[[Category:Undiscovered Game Formats]]

Multimedia Mike at 04:14, 17 September 2008

2008-09-17T04:14:37Z

New page

* Extension: ''none (extracted from a game resource file)''
* Company: Silicon Knights
* Samples: http://samples.mplayerhq.hu/game-formats/mgs1-vp3/

The GameCube version of Konami's [http://www.mobygames.com/game/gamecube/metal-gear-solid-the-twin-snakes Metal Gear Solid: The Twin Snakes], developed by Silicon Knights, uses files that are suspected to contain [[VP3]] video data.

== File Format ==
All multi-byte numbers are big-endian. The file header is as follows:

bytes 0-3 total size of file (number is too long?)
bytes 4-19 unknown
bytes 20-23 video width in pixels
bytes 24-27 video height in pixels
bytes 28-35 unknown
bytes 36-29 possibly the frame rate (18 fps?)
bytes 40-43 video codec FourCC ('13PV', VP31 spelled backwards)
bytes 44-63 unknown

Following the header is data that appears to conform to the [[VP3]] video coding method. It is unknown how the frame data is delimited. VP3 makes no provision for encoding frame length in the bitstream. It's possible that the demuxer and the video decoder in the game are one and the same and that the video decoder parses through data until it has finished a frame and then resets on a byte boundary (or perhaps a multi-byte boundary) to decode the next frame.

[[Category:Game Formats]]
[[Category:Formats missing in FFmpeg]]
[[Category:Undiscovered Game Formats]]