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28th March 2012, 22:48 | #4 | Link |
RipBot264 author
Join Date: May 2006
Location: Poland
Posts: 7,806
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there is no better way.
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29th March 2012, 16:41 | #6 | Link |
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Location: Germany
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Are you going for DVD? I assume you do.
Well if the source is 50p then converting it to 25p is not very desireable if you can, at least, make it 25i (50i) for DVD. This way you would not lose any temporal resolution, just spatial (obviously due to resizing). Then you need to take care of the different colorimety in HD and SD. This is very important and there's no excuse to exclude this step. You need ColorMatrix for this. Also, while not everyone would agree, I'd recommend to resize ITU compliant, in other words to 704 width, not 720. Aaand, a last thing to consider just to make your head hurt: if your source is very detailed it might be necessary to apply a bit of vertical blur so that there aren't tons of details that are present in only one field but not the other. This can lead to serious "line twitter" or, depending on the viewing device, lots of stair stepping. So, my suggestion is to try something like this: Code:
My1080p50Source() ColorMatrix(mode="Rec.709->Rec.601", clamp=0) Spline16Resize(704,576) #AddBorders(8,0,8,0) #704 is fine but if you really need 720 use this Blur(0, 0.5) #try with and without AssumeTFF() #Top Field First, set your desired output field order SeparateFields().SelectEvery(4,0,3).Weave() #50p to 25i Last edited by TheSkiller; 29th March 2012 at 16:44. |
30th March 2012, 11:18 | #8 | Link |
Life's clearer in 4K UHD
Join Date: Jun 2003
Location: Notts, UK
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Out of interest. What's the make and model of this "video player"?
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30th March 2012, 00:10 | #11 | Link |
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Join Date: Mar 2004
Posts: 889
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1920x1080 -> 704x576 is correct. Go for it.
As for progressive/interlaced, you should probably re-interlace it as TheSkiller said. Just remember to set the correct field order tag in the MPEG2/DVD encoder. Or you can leave it progressive and then encode it interlaced (i.e., fake-interlaced), though it risks a loss of motion fluency. You may overcome it by adding some motion blur. |
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