On2 VP6 - Revision history

Sembiance: samples

2025-05-14T15:33:48Z

samples

← Older revision		Revision as of 08:33, 14 May 2025
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	* Specification: http://multimedia.cx/mirror/vp6_format.pdf		* Specification: http://multimedia.cx/mirror/vp6_format.pdf
	* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]		* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]
			* Samples: {{DexvertSamples\|video/vp6EncodedVideo}}
	* Nice article form author of the codec (Paul Wilkins): http://www.dspdesignline.com/211100053?printableArticle=true		* Nice article form author of the codec (Paul Wilkins): http://www.dspdesignline.com/211100053?printableArticle=true

Kostya: now that the specification has been uncovered, the codec is no longer incomplete

2023-07-22T13:57:53Z

now that the specification has been uncovered, the codec is no longer incomplete

← Older revision		Revision as of 06:57, 22 July 2023
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	[[Category:Video Codecs]]		[[Category:Video Codecs]]
	~~[[Category:Incomplete Video Codecs]]~~

Multimedia Mike: link to spec

2011-09-15T04:23:56Z

link to spec

← Older revision		Revision as of 21:23, 14 September 2011
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	* Company: [[On2]]		* Company: [[On2]]
	* Whitepaper: http://www.on2.com/cms-data/pdf/1125607149174329.pdf ([[Mirrored Files\|mirrored]])		* Whitepaper: http://www.on2.com/cms-data/pdf/1125607149174329.pdf ([[Mirrored Files\|mirrored]])
			* Specification: http://multimedia.cx/mirror/vp6_format.pdf
	* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]		* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]
	* Nice article form author of the codec (Paul Wilkins): http://www.dspdesignline.com/211100053?printableArticle=true		* Nice article form author of the codec (Paul Wilkins): http://www.dspdesignline.com/211100053?printableArticle=true

Alex at 21:09, 22 December 2009

2009-12-22T21:09:30Z

← Older revision		Revision as of 14:09, 22 December 2009
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	* Whitepaper: http://www.on2.com/cms-data/pdf/1125607149174329.pdf ([[Mirrored Files\|mirrored]])		* Whitepaper: http://www.on2.com/cms-data/pdf/1125607149174329.pdf ([[Mirrored Files\|mirrored]])
	* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]		* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]
			* Nice article form author of the codec (Paul Wilkins): http://www.dspdesignline.com/211100053?printableArticle=true

	== Implementations ==		== Implementations ==

Multimedia Mike: note the mirror

2007-10-25T02:32:46Z

note the mirror

← Older revision		Revision as of 19:32, 24 October 2007
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	* FOURCCs: VP60, VP61, VP62		* FOURCCs: VP60, VP61, VP62
	* Company: [[On2]]		* Company: [[On2]]
	* Whitepaper: ~~[http://www.on2.com/cms-data/pdf/1125607149174329.pdf~~ http://www.on2.com/cms-data/pdf/1125607149174329.pdf]		* Whitepaper: http://www.on2.com/cms-data/pdf/1125607149174329.pdf ([[Mirrored Files\|mirrored]])
	* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]		* Samples: [http://samples.mplayerhq.hu/V-codecs/VP6/ http://samples.mplayerhq.hu/V-codecs/VP6/]

Aurel: Alternative coding is in fact huffman

2007-10-14T22:54:20Z

Alternative coding is in fact huffman

← Older revision		Revision as of 15:54, 14 October 2007
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	\| }		\| }
	\|-		\|-
	\| marker2 \|\| Equiprobable 1-bit \|\| Secondary buffer encoding algorithm. 0=Range coding, 1=~~Alternative~~ coding ~~method~~.		\| marker2 \|\| Equiprobable 1-bit \|\| Secondary buffer encoding algorithm. 0=Range coding, 1=Huffman coding.
	\|}		\|}

	If the secondary buffer is present, coeffient symbols are read from the secondary buffer using the algorithm indicated by marker2. VP60 has "the ability to switch to a faster entropy encoding strategy to ensure smooth playback" and "the ability to decode different parts of the bitstream on different sub-processors (for instance the vlx and the core), to ensure better overall system utilization" [http://www.on2.com/cms-data/pdf/1125607149174329.pdf]~~. The alterantive encoding method is not yet documented~~.		If the secondary buffer is present, coeffient symbols are read from the secondary buffer using the algorithm indicated by marker2. VP60 has "the ability to switch to a faster entropy encoding strategy to ensure smooth playback" and "the ability to decode different parts of the bitstream on different sub-processors (for instance the vlx and the core), to ensure better overall system utilization" [http://www.on2.com/cms-data/pdf/1125607149174329.pdf].

	=== Entropy Coding ===		=== Entropy Coding ===

DonDiego: Clarify.

2007-01-23T09:42:05Z

Clarify.

← Older revision		Revision as of 02:42, 23 January 2007
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	was driven underground by On2 on copyright infringement claims.		was driven underground by On2 on copyright infringement claims.

	~~The [[FFmpeg]] implementation supports VP61 and VP62 only to the extent necessary to play all known samples. It~~ is ~~known~~ to be incomplete with regard to the VP6 specification~~, though~~.		This specification is said to be incomplete with regard to the On2 VP6 specification.

	A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]		A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]

Suxen drol: marker2 description

2007-01-07T01:58:16Z

marker2 description

← Older revision		Revision as of 18:58, 6 January 2007
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	\| if (frame_mode == 0) { \|\| \|\| \|\|0 equals to INTRA_FRAME		\| if (frame_mode == 0) { \|\| \|\| \|\|0 equals to INTRA_FRAME
	\|-		\|-
	\| version \|\| 5 \|\| Constant \|\| 6=VP60/61, 7=VP60, 8=VP62		\| version \|\| 5 \|\| Constant \|\| 6=VP60/61, 7=VP60(Electronic Arts), 8=VP62
	\|-		\|-
	\| version2 \|\| 2 \|\| Constant \|\| 0=VP60, 3=VP61/62		\| version2 \|\| 2 \|\| Constant \|\| 0=VP60, 3=VP61/62
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	\| }		\| }
	\|}		\|}

	The coding alogorithm for VP60 sequences with a secondary buffer is not yet documented. VP60 is reported to have "the ability to switch to a faster entropy encoding strategy to ensure smooth playback" and "The ability to decode different parts of the bitstream on different sub-processors (for instance the vlx and the core), to ensure better overall system utilization" [http://www.on2.com/cms-data/pdf/1125607149174329.pdf].

	If dim_x or dim_y have values different from the previous intra frame, then the resolution of the encoded image has changed.		If dim_x or dim_y have values different from the previous intra frame, then the resolution of the encoded image has changed.
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	\| }		\| }
	\|-		\|-
	\| marker2 \|\| Equiprobable 1-bit \|\| ~~Ignored~~		\| marker2 \|\| Equiprobable 1-bit \|\| Secondary buffer encoding algorithm. 0=Range coding, 1=Alternative coding method.
	\|}		\|}

			If the secondary buffer is present, coeffient symbols are read from the secondary buffer using the algorithm indicated by marker2. VP60 has "the ability to switch to a faster entropy encoding strategy to ensure smooth playback" and "the ability to decode different parts of the bitstream on different sub-processors (for instance the vlx and the core), to ensure better overall system utilization" [http://www.on2.com/cms-data/pdf/1125607149174329.pdf]. The alterantive encoding method is not yet documented.

	=== Entropy Coding ===		=== Entropy Coding ===

Suxen drol: vp60 headers

2007-01-06T09:33:38Z

vp60 headers

← Older revision		Revision as of 02:33, 6 January 2007
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	was driven underground by On2 on copyright infringement claims.		was driven underground by On2 on copyright infringement claims.

	The [[FFmpeg]] implementation supports VP62 only to the extent necessary to play all known samples. It is known to be incomplete with regard to the VP6 specification, though.		The [[FFmpeg]] implementation supports VP61 and VP62 only to the extent necessary to play all known samples. It is known to be incomplete with regard to the VP6 specification, though.

	A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]		A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]
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	=== Introduction ===		=== Introduction ===

	VP6 uses unidirectional ("P-frame") and intra-frame (within the current frame) prediction. Entropy coding is performed using arithmetic (range?) coding and an 8x8 iDCT is used. The format supports dynamic adjustment of encoded video resolution.		VP6 uses unidirectional ("P-frame") and intra-frame (within the current frame) prediction. Entropy coding is performed using arithmetic (range?) coding and an 8x8 iDCT is used. The format supports dynamic adjustment of encoded video resolution. There are three variants of the VP6 codec, VP60 (Simple Profile), VP62 (Advanced Profile) and VP62 (Heightened Sharpness Profile).


	=== Macroblocks ===		=== Macroblocks ===
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	\| qp \|\| 6 \|\| Unsigned \|\| Quantization parameter valid range 0..63		\| qp \|\| 6 \|\| Unsigned \|\| Quantization parameter valid range 0..63
	\|-		\|-
	\| ~~marker_bit~~ \|\| 1 \|\| Constant \|\| ~~Value should be 0x1~~		\| marker \|\| 1 \|\| Constant \|\| 0=VP61/62, 1=VP60
	\|-		\|-
	\| if (frame_mode == 0) { \|\| \|\| \|\|0 equals to INTRA_FRAME		\| if (frame_mode == 0) { \|\| \|\| \|\|0 equals to INTRA_FRAME
	\|-		\|-
	\| version \|\| 7 \|\| Constant \|\| ~~Value should be 0x23~~		\| version \|\| 5 \|\| Constant \|\| 6=VP60/61, 7=VP60, 8=VP62
			\|-
			\| version2 \|\| 2 \|\| Constant \|\| 0=VP60, 3=VP61/62
	\|-		\|-
	\| interlace \|\| 1 \|\| Boolean \|\| true (1) means interlace will be used		\| interlace \|\| 1 \|\| Boolean \|\| true (1) means interlace will be used
			\|-
			\| if (marker==1 or version2==0) {
			\|-
			\| offset \|\| 16 \|\| Unsigned \|\| secondary buffer offset (bytes releative to start of buffer)
			\|-
			\| }
	\|-		\|-
	\| dim_y \|\| 8 \|\| Unsigned \|\| Macroblock height of video		\| dim_y \|\| 8 \|\| Unsigned \|\| Macroblock height of video
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	\| render_x \|\| 8 \|\| Unsigned \|\| Display width of video		\| render_x \|\| 8 \|\| Unsigned \|\| Display width of video
	\|-		\|-
	\| }		\| }else{
			\|-
			\| if (marker==1 or version2==0) {
			\|-
			\| offset \|\| 16 \|\| Unsigned \|\| secondary buffer offset (bytes releative to start of buffer)
			\|-
			\| }
			\|-
			\| }
	\|}		\|}

			The coding alogorithm for VP60 sequences with a secondary buffer is not yet documented. VP60 is reported to have "the ability to switch to a faster entropy encoding strategy to ensure smooth playback" and "The ability to decode different parts of the bitstream on different sub-processors (for instance the vlx and the core), to ensure better overall system utilization" [http://www.on2.com/cms-data/pdf/1125607149174329.pdf].

	If dim_x or dim_y have values different from the previous intra frame, then the resolution of the encoded image has changed.		If dim_x or dim_y have values different from the previous intra frame, then the resolution of the encoded image has changed.

DonDiego: VP60/VP61 are now supported.

2006-12-23T00:34:27Z

VP60/VP61 are now supported.

← Older revision		Revision as of 17:34, 22 December 2006
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	was driven underground by On2 on copyright infringement claims.		was driven underground by On2 on copyright infringement claims.

	The [[FFmpeg]] implementation supports VP62 to the extent necessary to play all known samples, ~~but not VP61 and VP60~~.		The [[FFmpeg]] implementation supports VP62 only to the extent necessary to play all known samples. It is known to be incomplete with regard to the VP6 specification, though.

	A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]		A decoder implementation may be found in the FFMPEG source file [http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/vp6.c?view=markup vp6.c]