On Thu, 4 Dec 2003, Matto Marjanovic wrote:
> o Added the "CVD" preset.
With a letterbox effect - cool! But not what I had in mind ;)
I took a brief clip from the D8 capture - 720x480 bottom first, all
that and used "-O preset=CVD". What I thought would happen was
clip 8 pixels from each side and then do a 2:1 downscale to 352x480
(the old "-I active=704x480 -O size=352x480" behaviour). What I ended
up with was 352x360 centered in a 352x480 frame:
INFO: [y4mscaler] Input Stream Header:
INFO: [y4mscaler] <<< frame size: 720x480 pixels (518400 bytes)
INFO: [y4mscaler] <<< frame rate: 30000/1001 fps (~29.970030)
INFO: [y4mscaler] <<< interlace: bottom-field-first
INFO: [y4mscaler] <<< sample aspect ratio: 10:11
INFO: [y4mscaler] CVD output format requested in NTSC norm.
INFO: [y4mscaler] Source matte region defaulting to full source frame.
INFO: [y4mscaler] Source active region defaulting to full source frame.
INFO: [y4mscaler] Target interlacing defaulting to match source.
INFO: [y4mscaler] Target active region defaulting to full target frame.
INFO: [y4mscaler] Deriving ratios from active regions and SARs...
INFO: [y4mscaler] ...using scaling ratios which pad target.
INFO: [y4mscaler] ...using scaling ratios which are simple.
++ WARN: [y4mscaler] Target active region clipped by projection of source.
++ WARN: [y4mscaler] Source active region clipped by projection of target.
INFO: [y4mscaler] === SOURCE parameters: =================
INFO: [y4mscaler] < stream:
INFO: [y4mscaler] < 720x480, SAR 10:11, bottom-field-first
INFO: [y4mscaler] < chroma subsampling: 420_JPEG
INFO: [y4mscaler] < chroma ss ratios: x 1:2 y 1:2
INFO: [y4mscaler] < active region:
INFO: [y4mscaler] < 704.000000x480.000000 at 8.000000,0.000000
INFO: [y4mscaler] < matte region:
INFO: [y4mscaler] < 720x480 at 0,0 (bg Y'CbCr: 16,128,128)
INFO: [y4mscaler] === SCALING parameters: ================
INFO: [y4mscaler] | Scaler: Matto's Generic Scaler
INFO: [y4mscaler] | kernels: linear, linear
INFO: [y4mscaler] === TARGET parameters: =================
INFO: [y4mscaler] > stream:
INFO: [y4mscaler] > 352x480, SAR 15:11, bottom-field-first
INFO: [y4mscaler] < chroma subsampling: 420_MPEG2
INFO: [y4mscaler] < chroma ss ratios: x 1:2 y 1:2
INFO: [y4mscaler] > active region:
INFO: [y4mscaler] > 352x360 at 0,60 (bg Y'CbCr: 16,128,128)
INFO: [y4mscaler] > X ratio: 1/2
INFO: [y4mscaler] > Y ratio: 3/4
INFO: [y4mscaler] Output Stream Header:
INFO: [y4mscaler] >>> frame size: 352x480 pixels (253440 bytes)
INFO: [y4mscaler] >>> frame rate: 30000/1001 fps (~29.970030)
INFO: [y4mscaler] >>> interlace: bottom-field-first
INFO: [y4mscaler] >>> sample aspect ratio: 15:11
INFO: [y4mscaler] Frame number 0
The 360 doesn't seem right - what happened?
Cheers,
Steven Schultz
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