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tutorial:deinterlacing_video [2010/04/17 06:17]
j.m
tutorial:deinterlacing_video [2012/11/11 08:51]
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-====== Deinterlacing video ====== 
  
-Deinterlacing video can be a tricky situation, especially with the numerous interlacing/​deinterlacing filters available in Avidemux. This guide is here to offer you some help in deciding which filters are better for you, and how you should them. 
- 
-====== Overview ====== 
- 
-Simply put, interlacing is a technique for storing frames of video in halves split between separate images. The picture is broken into multiple lines and the odd lines go to one frame, while the even lines go to the other frame. This is called interlaced video. If you do not properly deinterlace your video, the video pictures may look weird or at worst, be broken. 
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-====== Getting started ====== 
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-**Important**:​ 
-  * When you are deinterlacing video, the deinterlacing video filters should always go **first**, even before cropping filters. 
-  * Completely **disable** postprocessing of [[using:​Preferences#​Default Postprocessing|Horizontal and Vertical deblocking]]. These should be unnecessary for your video if other filters and the video codec settings are correct. 
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-====== DVD video ====== 
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-For DVD video, a good general purpose deinterlacing filter is [[using:​Video filter Decomb Telecide|Decomb Telecide]]. You will need to select a //​Strategy//​ type from the pulldown menu. Selecting "No strategy"​ will effectively remove any interlaced lines and result in a proper picture. This is recommended by default, other options are appropriate sometimes. See that article (or below) for more detailed information about that filter. ​ 
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-===== For NTSC framerate (30 fps) ===== 
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-If the source video is 29.97(nbsp)fps (or 30(nbsp)fps),​ and you want to keep that framerate, then all you need to do is deinterlace the video with Decomb Telecide and nothing else. 
-  * First add the **Decomb Telecide** filter. 
-  * For the filter configuration option //​Strategy//​ select //No Strategy//. This will only deinterlace the video and leave the framerate unaltered. 
-  * You do **not** need to use [[using:​Video filter Decomb Decimate|Decomb Decimate]] because you are not trying to reduce the number of frames in the video. 
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-===== For NTSC to PAL framerate: change 30 fps to 24 fps ===== 
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-If the source video is 29.97(nbsp)fps (or 30(nbsp)fps),​ and you want to transform it to 23.976(nbsp)fps (or 24(nbsp)fps),​ do the following: 
-  * First add the **Decomb Telecide** filter. 
-  * For the filter configuration option //​Strategy//​ select //3:2 Pulldown//. This will deinterlace the video and prepare framerate to be properly 24(nbsp)fps,​ but it does not actually do it. 
-  * You **must** also use [[using:​Video filter Decomb Decimate|Decomb Decimate]] after the Decomb Telecide to get the proper number of frames for 24(nbsp)fps. Using the default options Decomb Decimate are normally good enough. This will reduce the number of frames in the video to approximately 24(nbsp)fps. 
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-====== Recorded video ====== 
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-===== MythTV MPEG non-deinterlaced ===== 
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-Deinterlacing of video internally within MythTV is not always the most effective or the highest quality choice. Sometimes it is better to leave your video recorded in non-deinterlaced form and then deinterlace it in Avidemux using a more specialized and powerful filter. The video filter [[using:​Video filter Yadif|Yadif]] with default settings works very well in most situations. 
tutorial/deinterlacing_video.txt ยท Last modified: 2012/11/11 08:51 (external edit)