Difference between revisions of "Documentation:Video and Audio Filters"

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{{Outdated}}<!-- We don't use wxWidgets anymore -->
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VLC includes a system of ''filters'' that allow you to modify the audio and video.
 
VLC includes a system of ''filters'' that allow you to modify the audio and video.
  
 
==Deinterlacement and Post Processing==
 
==Deinterlacement and Post Processing==
  
VLC is able to deinterlace a video stream using different deinterlacement methods. Deinterlacement can be enabled in the ''Video'' menu, ''Deinterlacement'' menu item. The ''Blend'' methods gives the best results in most cases. The ''discard''method is a less resource consuming alternative.
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VLC is able to [[deinterlace]] a video stream using different deinterlacement methods. Deinterlacement can be enabled in the ''Video'' menu, ''Deinterlacement'' menu item. The ''Blend'' methods gives the best results in most cases. The ''discard'' method is a less resource consuming alternative, although its results may be slightly compromised.
  
On some particular streams (MPEG 4, DIVX, XVID, Sorenson, etc.), some additional image filtering can be applied to the video before display, improving its quality in some cases. This can be enabled in the ''Video'' menu, ''Post processing'' menu item. Different levels of post processing can be chosen here. A higher level means more filtering.
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On some particular streams ([[MPEG 4]], [[DivX]], [[Xvid]], [[Sorenson Video|Sorenson]], etc.), some additional image filtering can be applied to the video before display, improving its quality in some cases. This can be enabled by using the ''Post processing'' menu item in ''Video''. Different levels of post processing can be chosen here. A higher level means more filtering.
  
 
==Video filters==
 
==Video filters==
  
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=== Summary ===
 
VLC features several filters able to change the video (distortion, brightness adjustment, motion blurring, etc.).
 
VLC features several filters able to change the video (distortion, brightness adjustment, motion blurring, etc.).
  
With the wxWidgets interface, filters can be easily enabled using the Extended GUI. In the Video tab, simply select the filters to enable. Image settings can be easily adjusted.
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In Windows and Linux, the user must go to the ''Effects and Filters'' in the ''Tools'' menu item. A dialogue box entitled "Adjustments and Effects" will appear.
  
http://www.videolan.org/doc/play-howto/en/images/play-howto/intf-wx-vfilters.jpg Video filters selection in the wxWidgets interface'''- needs verifying for 0.9'''
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[[File:Video effects - essential, with image adjust selected.png|600px|center|alt=Effects and Filters dialogue box as it appears in a pre-release version of 2.0.0 on Ubuntu Linux]]
  
You can enable these filters through the ''Extended Controls panel'' on Mac OS X. Click on the triangle next to ''Video filters'' to select your filters or expand the ''Adjust Image'' section to change the contrast, hue, etc.
 
  
http://www.videolan.org/doc/play-howto/en/images/play-howto/intf-osx-vfilters.jpg Video filters selection in the Mac OS X interface'''- needs verifying for 0.9'''
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In [[macOS]] you can enable these filters through the ''Extended Controls panel''. Click on the triangle next to ''Video filters'' to select your filters or expand the ''Adjust Image'' section to change the contrast, hue, etc.
  
For better control, you need to go to the preferences. To select the filters to be enabled, go to ''Video'', then to ''Filters''. In the "video filter module" box, enter the names of the filters to enable, separated by semicommas. Filters will be applied in the selected order. Valid names are "clone", "wall", "transform", "adjust", "crop", "deinterlace", "distort", "motionblur" and "logo".
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[[File:intf-osx-vfilters.jpg|center|Filter dialogue box as it appears in macOS interface]]
  
If you want to tune the behavior of these filters, go to ''Video, Filters, [your filter]''. For each filter, you will find a short description and the options.
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iOS:
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[[File:VLC for iOS Video Filters.png|center|Filter dialogue box as it appears in iOS devices]]
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Example of combined effects on a video:
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[[File:VLC-combined-effects.png|center|alt=A striking image of a video with many effects]]
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=== Rotate ===
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You can easily rotate a video. Open the ''Effects and Filters'' dialog, in the ''Tools menu''
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[[File:Bbb_rotate.png|center|alt=A rotated image of a Big Buck Bunny video]]
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Select the ''Video Effects'' tab, then the ''Geometry'' one.
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Check the ''Transform'' checkbox to use rotation presets (90°, 180°, 270°) or check the ''Rotate'' checkbox to manually select the angle you wish to apply.
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[[File:Video effects - geometry, with rotate selected.png|center|alt=The rotate video dialogue box under the wxWidgets interface]]
  
 
==Audio filters==
 
==Audio filters==
  
 
===Equalizer===
 
===Equalizer===
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{{Wikipedia|Equalization (audio)}}
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VLC features a 10-band graphical equalizer, a device used to alter the relative frequencies of audio (e.g. for a bass boost). You can display it by activating the advanced GUI on [[wxWidgets]] or by clicking the ''Equalizer'' button on the macOS interface. The following image is the interface of the audio equalizer in the Windows and GNU/Linux interface.
  
VLC features a 10-band graphical equalizer. You can display it by activating the advanced GUI on wxWidgets or by clicking the ''Equalizer'' button on the MacOS X interface.
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[[File:Audio Filters.PNG|center|Equalizer dialogue box as it appears in wxWidgets for Windows and Linux]]
  
http://www.videolan.org/doc/play-howto/en/images/play-howto/intf-wx-equalizer.jpg The equalizer in the wxWidgets interface'''- needs verifying for 0.9'''
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The equalizer in the macOS interface
  
http://www.videolan.org/doc/play-howto/en/images/play-howto/intf-osx-equalizer.jpg The equalizer in the MacOS X interface'''- needs verifying for 0.9'''
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[[File:Intf-osx-equalizer.jpg|center|alt=Equalizer dialogue box as it appears in macOS]]
  
Presets are available in the Audio menu in wxWidgets, or in the Equalizer window in the MacOS X interface.
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[[File:VLC for iOS Equalizer.png|center|alt=Equalizer dialogue box as it appears in iOS devices]]
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Presets are available in all of these dialog boxes.
  
 
===Other audio filters===
 
===Other audio filters===
  
At the moment, VLC features two other audio filters: a volume normalizer and a filter providing sound spatialization with a headphone. They can be enabled in the Audio tab of the extended GUI for the wxWidgets interface and in the Audio section of the Extended Controls panel of the Mac OS X interface.
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At the moment, VLC features two other audio filters: a volume normalizer and a filter providing sound spatialization with a headphone. They can be enabled in the ''Effects and Filters'' menu item in the ''Tools'' tab of the Windows and GNU/Linux interface and in the Audio section of the Extended Controls panel of the macOS interface.
  
 
For better control, you need to go to the preferences. To select the filters to be enabled, go to ''Audio'', then to ''Filters''. In the "audio filters" box, enter the names of the filters to enable, separated by commas. Valid names are "equalizer", "normvol" and "headphone".
 
For better control, you need to go to the preferences. To select the filters to be enabled, go to ''Audio'', then to ''Filters''. In the "audio filters" box, enter the names of the filters to enable, separated by commas. Valid names are "equalizer", "normvol" and "headphone".
  
 
If you want to tune the behavior of these filters, go to ''Audio, Filters, [your filter]''. The equalizer and headphone filters can be tuned.
 
If you want to tune the behavior of these filters, go to ''Audio, Filters, [your filter]''. The equalizer and headphone filters can be tuned.
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{{Documentation}}

Latest revision as of 05:16, 22 April 2019

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VLC User Guide

Quick Start Guide
Installing VLC
History
Usage
Interface
Open Media
Audio
Video
Playback
Playlist
Subtitles
Video and Audio Filters
Snapshots
Hotkeys
Uninstalling VLC
Troubleshooting
Advanced usage
Using VLC inside a webpage
Command line
Alternative Interfaces
Misc

Appendix
Building Pages for the HTTP Interface
Format String
Building Lua Playlist Scripts
View this alone

VLC includes a system of filters that allow you to modify the audio and video.

Deinterlacement and Post Processing

VLC is able to deinterlace a video stream using different deinterlacement methods. Deinterlacement can be enabled in the Video menu, Deinterlacement menu item. The Blend methods gives the best results in most cases. The discard method is a less resource consuming alternative, although its results may be slightly compromised.

On some particular streams (MPEG 4, DivX, Xvid, Sorenson, etc.), some additional image filtering can be applied to the video before display, improving its quality in some cases. This can be enabled by using the Post processing menu item in Video. Different levels of post processing can be chosen here. A higher level means more filtering.

Video filters

Summary

VLC features several filters able to change the video (distortion, brightness adjustment, motion blurring, etc.).

In Windows and Linux, the user must go to the Effects and Filters in the Tools menu item. A dialogue box entitled "Adjustments and Effects" will appear.

Effects and Filters dialogue box as it appears in a pre-release version of 2.0.0 on Ubuntu Linux


In macOS you can enable these filters through the Extended Controls panel. Click on the triangle next to Video filters to select your filters or expand the Adjust Image section to change the contrast, hue, etc.

Filter dialogue box as it appears in macOS interface

iOS:

Filter dialogue box as it appears in iOS devices

Example of combined effects on a video:

A striking image of a video with many effects

Rotate

You can easily rotate a video. Open the Effects and Filters dialog, in the Tools menu

A rotated image of a Big Buck Bunny video

Select the Video Effects tab, then the Geometry one.

Check the Transform checkbox to use rotation presets (90°, 180°, 270°) or check the Rotate checkbox to manually select the angle you wish to apply.

The rotate video dialogue box under the wxWidgets interface

Audio filters

Equalizer

VLC features a 10-band graphical equalizer, a device used to alter the relative frequencies of audio (e.g. for a bass boost). You can display it by activating the advanced GUI on wxWidgets or by clicking the Equalizer button on the macOS interface. The following image is the interface of the audio equalizer in the Windows and GNU/Linux interface.

Equalizer dialogue box as it appears in wxWidgets for Windows and Linux

The equalizer in the macOS interface

Equalizer dialogue box as it appears in macOS
Equalizer dialogue box as it appears in iOS devices

Presets are available in all of these dialog boxes.

Other audio filters

At the moment, VLC features two other audio filters: a volume normalizer and a filter providing sound spatialization with a headphone. They can be enabled in the Effects and Filters menu item in the Tools tab of the Windows and GNU/Linux interface and in the Audio section of the Extended Controls panel of the macOS interface.

For better control, you need to go to the preferences. To select the filters to be enabled, go to Audio, then to Filters. In the "audio filters" box, enter the names of the filters to enable, separated by commas. Valid names are "equalizer", "normvol" and "headphone".

If you want to tune the behavior of these filters, go to Audio, Filters, [your filter]. The equalizer and headphone filters can be tuned.

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