Deinterlacing - Revision history

DoesItReallyMatter: Set page anchor #Modes to /* VLC deinterlace modes */

2019-04-04T06:20:29Z

Set page anchor #Modes to VLC deinterlace modes

← Older revision		Revision as of 06:20, 4 April 2019
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	Due to practical reasons, these algorithms are always based on analyzing the picture. They are not and cannot be perfectly accurate, but in practice they work well for most telecined sources.		Due to practical reasons, these algorithms are always based on analyzing the picture. They are not and cannot be perfectly accurate, but in practice they work well for most telecined sources.

	== VLC deinterlace modes ==		== <span id="Modes"></span> VLC deinterlace modes ==
	[[File:VLC_-_Deinterlace_Mode.png\|250px\|thumb\|right\|The deinterlace options selection]]		[[File:VLC_-_Deinterlace_Mode.png\|250px\|thumb\|right\|The deinterlace options selection]]
	VLC has the following deinterlace modes. Refer to 100fps.com for illustrations. VLC does not have anything like what 100fps.com calls Motion blur, Hybrid, and Motion compensation.		VLC has the following deinterlace modes. Refer to 100fps.com for illustrations. VLC does not have anything like what 100fps.com calls Motion blur, Hybrid, and Motion compensation.

DoesItReallyMatter: -:Category:Video Filters: Documentation:Modules/deinterlace is already in category

2019-03-13T02:53:49Z

-Category:Video Filters: Documentation:Modules/deinterlace is already in category

← Older revision		Revision as of 02:53, 13 March 2019
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	'''7)''' IVTC outputs at (4/5)x of original framerate, when inverting telecine on a locked-on cadence, and at 1x while trying to acquire lock-on.		'''7)''' IVTC outputs at (4/5)x of original framerate, when inverting telecine on a locked-on cadence, and at 1x while trying to acquire lock-on.


	~~[[Category:Video Filters]]~~
	[[Category:Glossary]]		[[Category:Glossary]]
	{{Documentation}}		{{Documentation}}

DoesItReallyMatter: Fix broken link: Documentation:Hacker Guide/Video Filters/Deinterlace → Hacker Guide/Video Filters/Deinterlace

2019-03-02T04:57:58Z

Fix broken link: Documentation:Hacker Guide/Video Filters/Deinterlace → Hacker Guide/Video Filters/Deinterlace

← Older revision		Revision as of 04:57, 2 March 2019
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	This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.		This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.

	If you are a developer looking for more detailed technical understanding, this module also has a section in the [[~~Documentation:~~Hacker Guide/Video Filters/Deinterlace\|Hacker Guide]].		If you are a developer looking for more detailed technical understanding, this module also has a section in the [[Hacker Guide/Video Filters/Deinterlace\|Hacker Guide]].

	'''Terminology'''		'''Terminology'''

DoesItReallyMatter: Remove {{Module}} from /* Algorithm types */, there is now a link to Documentation:Modules/deinterlace in the appendix

2019-02-22T10:09:31Z

Remove {{Module}} from Algorithm types: , there is now a link to Documentation:Modules/deinterlace in the appendix

← Older revision		Revision as of 10:09, 22 February 2019
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	== Algorithm types ==		== Algorithm types ==

	~~{{Module\|name=deinterlace\|type=Video Filter\|description=Removes interlacing from display}}~~

	In {{VLC}}, there are several deinterlacing algorithms to choose from. This section presents a general classification. Skip ahead for an individual description of each mode.		In {{VLC}}, there are several deinterlacing algorithms to choose from. This section presents a general classification. Skip ahead for an individual description of each mode.
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	== Appendix: Technical summary ==		== Appendix: Technical summary ==
			{{See also\|Documentation:Modules/deinterlace}}

	This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.		This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.

DoesItReallyMatter: Wikilinks, template, CSS

2019-02-22T09:50:20Z

Wikilinks, template, CSS

← Older revision		Revision as of 09:50, 22 February 2019
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	{{VLC}} has deinterlacing off by default.		{{VLC}} has deinterlacing off by default.

	You can enable it for the currently playing video by using the main menus, the right-click menus or by using [[hotkey]] (by default: '''D'''). It switches deinterlacing on and off (using the mode selected in the Preferences).		You can enable it for the currently playing video by using the main menus, the right-click menus or by using [[hotkey]] (by default: '''D'''). It switches deinterlacing on and off (using the mode selected in the [[Preferences]]).

	To change the settings, go to the Video section in the Simple Preferences. You can choose from On, Automatic or Off. This setting controls whether VLC enables deinterlacing when you open a video. You can also choose the mode (algorithm). See below for available modes and mode recommendations.		To change the settings, go to the Video section in the Simple Preferences. You can choose from On, Automatic or Off. This setting controls whether VLC enables deinterlacing when you open a video. You can also choose the mode (algorithm). See below for available modes and mode recommendations.
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	Note that if you enable deinterlacing from the menu, the setting will only take effect for the currently playing video. When the video ends, both the on/off/automatic and the mode settings will return to the values set in the preferences. If you want to always enable deinterlacing on every video, type "Deinterlace" in the Video Filter preferences.		Note that if you enable deinterlacing from the menu, the setting will only take effect for the currently playing video. When the video ends, both the on/off/automatic and the mode settings will return to the values set in the preferences. If you want to always enable deinterlacing on every video, type "Deinterlace" in the Video Filter preferences.

	The ~~[[Hotkeys\|~~keyboard shortcut]] to switch deinterlacing on and off can be configured in the [[Hotkeys]] section of the Simple Preferences. Its name is ''Cycle deinterlace modes''.		The keyboard shortcut to switch deinterlacing on and off can be configured in the [[Hotkeys]] section of the Simple Preferences. Its name is ''Cycle deinterlace modes''.

	If you use VLC from the command line, you can also set the deinterlace options in your command. To get a list and short description of the available options, run <pre>vlc -p deinterlace --advanced</pre> Note that the deinterlace command-line options are prefixed by "sout" for historical reasons only; they are intended for normal playback use. For more information on using VLC from the command line, see [[VLC command-line help]].		If you use VLC from the command line, you can also set the deinterlace options in your command. To get a list and short description of the available options, run <pre>vlc -p deinterlace --advanced</pre> Note that the deinterlace command-line options are prefixed by "sout" for historical reasons only; they are intended for normal playback use. For more information on using VLC from the command line, see [[VLC command-line help]].
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	'''Technical detail about Automatic mode'''		'''Technical detail about Automatic mode'''

	The version control history (git log) says the following about the ''Automatic'' mode (see ~~commit [https://git.videolan.org/?p=vlc.git;h=~~f96b075043c421fb6466829a15ae0c8792b8ffe8 ~~f96b075043c421fb6466829a15ae0c8792b8ffe8]~~):		The version control history (git log) says the following about the ''Automatic'' mode (see {{Commitdiff\|f96b075043c421fb6466829a15ae0c8792b8ffe8}}):

	''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''		''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''
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	=== Yadif (v1.1.0+)===		=== Yadif (v1.1.0+)===
	Interpolator. The ''Yet Another DeInterlacing Filter'' from the MPlayer project. Generates a full picture taking the odd lines from the odd half-picture, and creating the even lines through a complicated algorithm that includes both temporal and spatial interpolation.		Interpolator. The ''Yet Another DeInterlacing Filter'' from the [[MPlayer]] project. Generates a full picture taking the odd lines from the odd half-picture, and creating the even lines through a complicated algorithm that includes both temporal and spatial interpolation.

	=== Yadif (2x) (v1.1.0+)===		=== Yadif (2x) (v1.1.0+)===
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	This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.		This table summarizes various technical information on the algorithms. Don't be afraid to dive in - it's intended for users.

	If you are a developer looking for more detailed technical understanding, this module also has a section in the [[Documentation:Hacker's Guide/Video Filters/Deinterlace\|Hacker's Guide]].		If you are a developer looking for more detailed technical understanding, this module also has a section in the [[Documentation:Hacker Guide/Video Filters/Deinterlace\|Hacker Guide]].

	'''Terminology'''		'''Terminology'''
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	'''Legend'''		'''Legend'''

	* Column 4:2:0 in the table = "if input has 4:2:0 chroma, then..." See [~~http:~~//en.wikipedia.org/wiki/Chroma_subsampling#Sampling_systems_and_ratios] for an explanation and pictures. This format is common on DVDs.		* Column 4:2:0 in the table = "if input has 4:2:0 chroma, then..." See [//en.wikipedia.org/wiki/Chroma_subsampling#Sampling_systems_and_ratios] for an explanation and pictures. This format is common on DVDs.
	* Column 4:2:2 in the table = "if input has 4:2:2 chroma, then..."		* Column 4:2:2 in the table = "if input has 4:2:2 chroma, then..."
	* C, H, FR = output Chroma, Height, Framerate		* C, H, FR = output Chroma, Height, Framerate
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	{\| ~~align~~="left ~~"valign="~~center" border="1"		{\| style="text-align:left; vertical-align:center;" border="1"
	! Algo		! Algo
	! 4:2:0		! 4:2:0

DoesItReallyMatter: /* VLC settings */ Repair dead link to commit

2019-02-06T09:39:18Z

VLC settings: Repair dead link to commit

← Older revision		Revision as of 09:39, 6 February 2019
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	'''Technical detail about Automatic mode'''		'''Technical detail about Automatic mode'''

	The version control history (git log) says the following about the ''Automatic'' mode (see commit [f96b075043c421fb6466829a15ae0c8792b8ffe8]):~~{{Dead link}}~~		The version control history (git log) says the following about the ''Automatic'' mode (see commit [https://git.videolan.org/?p=vlc.git;h=f96b075043c421fb6466829a15ae0c8792b8ffe8 f96b075043c421fb6466829a15ae0c8792b8ffe8]):

	''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''		''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''

DoesItReallyMatter: /* Which type of interlacing do I have? */ Creating an anchor to direct incoming links from NTSC and PAL pages. Anchor name: "types"

2019-01-23T05:45:29Z

Which type of interlacing do I have?: Creating an anchor to direct incoming links from NTSC and PAL pages. Anchor name: "types"

← Older revision		Revision as of 05:45, 23 January 2019
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	*[http://users.softlab.ece.ntua.gr/~ttsiod/ivtc.html NTSC, telecine, and how to cope (using telecide and decimate)]		*[http://users.softlab.ece.ntua.gr/~ttsiod/ivtc.html NTSC, telecine, and how to cope (using telecide and decimate)]

	== Which type of interlacing do I have? ==		== <span id="types"></span> Which type of interlacing do I have? ==
	This depends on the format (PAL, NTSC) and the content of the source. PAL is used in Europe and Australia, NTSC in USA and Japan. This also applies to the DVDs produced in those regions.		This depends on the format (PAL, NTSC) and the content of the source. PAL is used in Europe and Australia, NTSC in USA and Japan. This also applies to the DVDs produced in those regions.

DoesItReallyMatter: tweaks

2014-11-11T22:36:14Z

tweaks

DoesItReallyMatter: /* VLC settings */

2014-11-11T11:28:39Z

VLC settings

← Older revision		Revision as of 11:28, 11 November 2014
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	{{VLC}} has deinterlacing off by default.		{{VLC}} has deinterlacing off by default.

	You can enable it for the currently playing video by using the main menus, the right-click menus or by using [[hotkey] (by default: '''D'''). It switches deinterlacing on and off (using the mode selected in the Preferences).		You can enable it for the currently playing video by using the main menus, the right-click menus or by using [[hotkey]] (by default: '''D'''). It switches deinterlacing on and off (using the mode selected in the Preferences).

	To change the settings, go to the Video section in the Simple Preferences. You can choose from On, Automatic or Off. This setting controls whether VLC enables deinterlacing when you open a video. You can also choose the mode (algorithm). See below for available modes and mode recommendations.		To change the settings, go to the Video section in the Simple Preferences. You can choose from On, Automatic or Off. This setting controls whether VLC enables deinterlacing when you open a video. You can also choose the mode (algorithm). See below for available modes and mode recommendations.

DoesItReallyMatter: nn

2014-11-03T05:09:25Z

← Older revision		Revision as of 05:09, 3 November 2014
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	=== Disabled ===		=== Disabled ===
	This is what 100fps.com calls "do nothing". Other names: "weave" or "no deinterlacing". Should be used for PsF ([~~http:~~//en.wikipedia.org/wiki/Progressive_segmented_Frame]) content.		This is what 100fps.com calls "do nothing". Other names: "weave" or "no deinterlacing". Should be used for PsF ([//en.wikipedia.org/wiki/Progressive_segmented_Frame]) content.

	=== Blend ===		=== Blend ===

← Older revision		Revision as of 22:36, 11 November 2014
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	The [[Hotkeys\|keyboard shortcut]] to switch deinterlacing on and off can be configured in the [[Hotkeys]] section of the Simple Preferences. Its name is ''Cycle deinterlace modes''.		The [[Hotkeys\|keyboard shortcut]] to switch deinterlacing on and off can be configured in the [[Hotkeys]] section of the Simple Preferences. Its name is ''Cycle deinterlace modes''.

	If you use VLC from the command line, you can also set the deinterlace options in your command. To get a list and short description of the available options, run <pre>vlc -p deinterlace --advanced</pre> Note that the deinterlace command-line options are prefixed by "sout" for historical reasons only; they are intended for normal playback use. For more information on using VLC from the command line, see [[~~VLC_command-line_help\|~~VLC command-line help]].		If you use VLC from the command line, you can also set the deinterlace options in your command. To get a list and short description of the available options, run <pre>vlc -p deinterlace --advanced</pre> Note that the deinterlace command-line options are prefixed by "sout" for historical reasons only; they are intended for normal playback use. For more information on using VLC from the command line, see [[VLC command-line help]].

	'''Technical detail about Automatic mode'''		'''Technical detail about Automatic mode'''

	The version control history (git log) says the following about the ''Automatic'' mode (see commit [f96b075043c421fb6466829a15ae0c8792b8ffe8]):		The version control history (git log) says the following about the ''Automatic'' mode (see commit [f96b075043c421fb6466829a15ae0c8792b8ffe8]):{{Dead link}}

	''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''		''The detection is based on the progressive/interlaced flags transported at the codec level. As such, it is not really reliable (for 25fps at least).''
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	== Interlaced or telecined? ==		== Interlaced or telecined? ==
	In addition to true interlaced signals, there exists also a process called telecine which produces interlacing. It is a type of artificial interlacing that may be added to sources that were originally progressive. Telecine produces a characteristic look, with a repeating sequence of 3 progressive frames followed by 2 artificially interlaced frames.		In addition to true interlaced signals, there exists also a process called ''telecine'' which produces interlacing. It is a type of artificial interlacing that may be added to sources that were originally progressive. Telecine produces a characteristic look, with a repeating sequence of 3 progressive frames followed by 2 artificially interlaced frames.

	Why would anyone want to do that? The answer lies in different ~~framerates~~, and in transfer of film sources to television and video. Film is commonly shot at 24 pictures per second, while NTSC television and video equipment operates at 60 half-pictures per second. Telecine inserts extra half-pictures so that films can be stored in the NTSC format (for example on DVDs in Japan and USA).		Why would anyone want to do that? The answer lies in different [[framerate]]s, and in transfer of film sources to television and video. Film is commonly shot at 24 pictures per second, while NTSC television and video equipment operates at 60 half-pictures per second. Telecine inserts extra half-pictures so that films can be stored in the NTSC format (for example on DVDs in Japan and USA).

	For more on telecine, see for example the following links:		For more on telecine, see for example the following links:
	*[~~http:~~//en.wikipedia.org/wiki/Telecine Telecine (in Wikipedia)]		*[//en.wikipedia.org/wiki/Telecine Telecine (in Wikipedia)]
	*[http://arbor.ee.ntu.edu.tw/~jackeikuo/dvd2avi/ivtc/ Inverse Telecine]		*[http://arbor.ee.ntu.edu.tw/~jackeikuo/dvd2avi/ivtc/ Inverse Telecine]
	*[http://neuron2.net/LVG/telecining1.html NTSC Telecine - Luke's Video Guide]		*[http://neuron2.net/LVG/telecining1.html NTSC Telecine - Luke's Video Guide]
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	Telecine is very common in Asia and especially in Japan. Anything originating in Asia is likely to be telecined. For example, with very few exceptions, all anime in the NTSC format is telecined. This includes the corresponding North American releases.		Telecine is very common in Asia and especially in Japan. Anything originating in Asia is likely to be telecined. For example, with very few exceptions, all anime in the NTSC format is telecined. This includes the corresponding North American releases.

	Source material that was converted from a different format is a special case. Producing a correct transfer for pure video material from NTSC to PAL or vice versa is very difficult due to the differences in framerate and number of lines. Whether a deinterlacer is needed depends on the details of the transfer. In the particular case of anime, a PAL conversion usually spells disaster for deinterlacing; see [http://www.animemusicvideos.org/guides/avtech/videogetb2a.html].		Source material that was converted from a different format is a special case. Producing a correct transfer for pure video material from NTSC to PAL or vice versa is very difficult, due to the differences in framerate and number of lines. Whether a deinterlacer is needed depends on the details of the transfer. In the particular case of anime, a PAL conversion usually spells disaster for deinterlacing; see [http://www.animemusicvideos.org/guides/avtech/videogetb2a.html].

	== Algorithm types ==		== Algorithm types ==
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	=== IVTC (v1.2.0+) ===		=== IVTC (v1.2.0+) ===
	Inverse telecine. Removes telecine from NTSC telecined video in realtime, ~~losslessly~~ recovering the progressive signal. '''Note''': Only applicable to telecined sources. Particularly useful for NTSC anime DVDs.		Inverse telecine. Removes telecine from NTSC telecined video in realtime, [[lossless]]ly recovering the progressive signal. '''Note''': Only applicable to telecined sources. Particularly useful for NTSC anime DVDs.