Methods of deinterlacing. How to deinterlace video clips, divx movies ? What is deinterlacing? How to deinterlace movies? When you make a movie with your digital camcorder, it does the following: records 50 pictures per second, intermixing every 2 consecutive pictures (with half the height) into 1 frame. 2 pictures (fields) are mixed into 1 frame. This mixing is called interlacing. Picture 1. + Picture 2. = Picture 1 + Picture 2 Some digital camcorders also have additional unknown artifacts, because of "color interlacing" (strange color patterns, hardware bugs, color aberrations introduced by the camcorder's lens system) and "brightness interlacing lines". Interlacing is not a bug. This is the way digital camcorders and digital VCRs record and digital broadcasting is done. One second of a movie consists of 25 frames = 50 interlaced pictures (fields). Interlacing is in fact a clever way to compress a movie when one cannot use digital compression methods. So, deinterlacing is the process of transformation of interlaced (mixed) video frames into normal video frames (with good quality, without interlaced horizontal lines). Deinterlacing methods are: 1) Blend, average, combine fields. Both fields are overlaid together. This gives you good results, when there's no movement, but results in unnatural low quality movements. There seem to be a ghosty unsharpness when something moves. 2) Discard. You discard every second line (the movie is half the height then) and then resize the picture during play. That is the same as skipping Field2, Field4, Field6... You could call this "Even Fields Only" or "Odd Fields Only". You lose half of the resolution and the movie becomes kind of stuttering (as mentioned above). That means, that it doesn't play as fluidly as it could be. 3) Bob (Progressive Scan). Displaying every field (so you don't lose any information), one after the other (= without interlacing) but with 50 fps. Thus each interlaced frame is split into 2 SMALL frames (= the 2 former fields) half the height. 4) THE BEST METHOD: Bob (Progressive scan) + Intelligent Adaptive Hybrid. Analyzing the two fields and deinterlace only parts which need to. It gives you a 50fps movie instead of a 25fps movie, thus leaving you with perfect fluidity of motions. High temporal and vertical resolution (NORMAL frames). If you want to deinterlace your 25fps movie into 50fps with high quality then use 4th method: 1) Download VirtualDub from here: VirtualDub 2) Download "Deinterlace-Smooth" plugin: DeinterlaceSmooth.zip 3) Copy the plugin with .vdf extension to plugins folder of VirtualDub (c:\Program Files\VirtualDub\plugins\) 4) Open movie (File.. -> Open AVI file..). 5) Go to Virtualdub's Filter menu (Video->Filters..) and "Add.." downloaded "Deinterlace Smooth" filter. 6) Choose video compression (XviD codec) 7) Choose audio compression 8) Save your file. If you want to deinterlace your 25fps movie into 25fps with low quality, but faster then use 2nd method: 1) Download VirtualDub from here: VirtualDub 2) Open movie (File.. -> Open AVI file..). 3) Go to Virtualdub's Filter menu and "Add.." the built-in filter "Deinterlace". 4) Choose "Discard Field1" or "Discard Field2", depending on your video material. 5) Choose video compression (XviD codec). 6) Choose audio compression. 7) Save your file.  See Also:  How to backup DVD movies using free software ?