I have read elsewhere that video resizing should not be done on interlaced source to avoid quality loss. My souce is 16:9 1920x1080 top field first interlaced source 29.97 frames per second (I assume that it is 60 fields per second). I am using avisynth and HC to do the conversion. My goal is highest quality for the conversion rather than speed. I am assuming that the avisynth script is feeding 29.97 frames per second progressive input to the HC encoder.
Is the below the right approach for this? Comments will be appreciated.
HC ini file:
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Is your source interlaced (60 different images per second) or telecined film (24 different images per second)? If the latter you will be better of with an inverse telecine:
For true interlaced video, if you really want the best quality, use QTGMC() instead of Yadif(). Then resize and use SeparateFields().SelectEvery(4,0,3).Weave().
For fast and dirty use:
Last edited by jagabo; 23rd Jul 2011 at 11:26.
Don't forget to add a ColorMatrix line when converting from 1080i to 480i/p as well:
If it is interlaced, you can use a faster preset in QTGMC to still get a lot of benefit from the script over what you can get out of just yadif alone. The following will run QTGMC using yadif rather than NNEDI2/3 or EEDI2 as the interpolator. It still eliminates the bob shimmer.
QTGMC("Ultra Fast") ## <-- can change to "Ultra Fast",TR2=1 [or 2] if you still have issues with bob shimmer.