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1st April 2010, 19:37 | #1 | Link |
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Join Date: Oct 2004
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math\aspect ratio quest, sorta
hi all,
i have a video sized 2944x1200 i want to downsize it so the width will be around 1800 and the height will keep the ratio AND will be dividable by 16 whats a good method to find it? willing to crop, realy would like to get the formula so i don't ask this again anytime soon... Last edited by Guest; 1st April 2010 at 19:53. Reason: rule 12 |
1st April 2010, 20:25 | #3 | Link |
brontosaurusrex
Join Date: Oct 2001
Posts: 2,392
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http://smok3.bplaced.net/resize/?ssm...css=&doit=true
Code:
# resizeCalc Avisynth # pixels = 1278720, DAR error = 0.041 # Crop(Left, top, -right, -Bottom) Crop(0,2,-0,-4) # 2944x1194(-6px) LanczosResize(1776,720) # (modw16,modh16) |
1st April 2010, 21:27 | #5 | Link |
Life's clearer in 4K UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 12,227
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2944 divided by 1200 = 2.45333
Personally, I'd recommend you adopt the high-def frame size width of 1920 pixels... Meaning, 1920 pixels divided by 2.45333 = 782.608 pixels high. The nearest mod-16 value to 782 pixels is 784 pixels. So the finished frame size (resolution) would be 1920 x 784 pixels.
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2nd April 2010, 00:12 | #6 | Link |
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i want it a less then that as i dont play it full screen and i like to have space on the sides.
a bit about the footage- its a screen capture of my dual screen pc setup. a 1920x1280 and a smaller 17" running at 1024x768. i currently use a demo of a timesnapper - it also saves statistics of usage linked to activity timeline timesnapper screencaptures to jpg every 3 seconds from there it passes to avisynth Code:
CoronaSequence("D:\timeSnapper\2010-03-14\*.jpg",textmode=1,size=28,y=1145) #2944x1200 http://smok3.bplaced.net/resize/index.php Crop(0,2,-0,-4) # 2944x1194(-6px) LanczosResize(1808,736) # (modw16,modh16) ConvertToYV12() i am currently in between encoders, looking for one that accepts avisynth (handbrake doesn't, staxrip doent play nice, super! is a messy beast). i usually go with avs2avi but am looking into FFmpeg, any tips there would be great. i |
6th April 2010, 01:27 | #7 | Link |
Derek Prestegard IRL
Join Date: Nov 2003
Location: Los Angeles
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Read my signature
Seriously though, x264 will probably be your best bet. What are you trying to target with your encode? ~MiSfit
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6th April 2010, 08:50 | #8 | Link |
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im trying to keeping small fonts readable, conserve space and not mess the colors.
as im willing to do the video conversion non-real-time, cpu usage is less important. but would like the format to be easily editable in sony vegas. for now i use the msu codec Code:
avs2avi.exe %IN% %OUT% -c MSUD |
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aspect, math |
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