helix mobile producer on-demand user's guide - RealPlayer

Helix Mobile Producer On-Demand User’s GuideInverse Telecine DiagramCroppingThis video prefilter crops the video to a specified region.The video cropping prefilter exposes values for Left, Top, Width, and Heightfor the cropping region. The basic restrictions on possible values are that thecropped image must be no less than 32x32 pixels (or in the case of H.263,128x96) and no larger than the original image.Note: RealVideo codecs require their input video size to bedivisible by 4.DeinterlaceThis filter will remove interlace artifacts (jaggies) that are visible whenconverting 29.97 fps - 60 fields/second interlaced video (this is what isbroadcast to your television) to 29.97 fps progressive video (what you see on acomputer screen). The jaggies that result from this conversion are a result ofthe even/odd fields in the source video, and is most noticeable on movingimages.Use this filter for video input that is interlaced. Keep in mind, however, that ifthe original video source was not interlaced and you use the deinterlace filteranyway, the quality of the output will be very poor.Note: A video is interlaced if you can see a "combing" effect inthe preview panel. Essentially, an interlaced frame consists oftwo images captured at different times and combined in oneframe in such a way that the two instants merge into a singleimage.44