24.02.2021, 18:36
I read this to understand how the resizing settings with Hybrid work, still have some questions:
https://forum.selur.net/showthread.php?t...ht=picture
https://forum.selur.net/showthread.php?tid=1300
My video file VHS PAL capture to lossless HuffYUV with VirtualDub, 720x576 25i, DAR 4:3, PAR is not set in the header, but I assume it is 1150/1053 as it is from an analog content.
But in this case the calculated DAR would be 1.365, not exactly 1.33333 to reflect 4:3 ratio. This might be the case why cropping from 720 to 704 is recommended. It would be 704x576 with PAR = 1150/1053 resulting in 1.33, what is a correct 4:3 ratio.
But for the MPEG-4 based content PAR has to be 12:11, for 720x576 would result in 1.364, it is also not the 4:3.
It means 720x576 has to be cut to 704?
I am planning to cut some pixels on the bottom, on the sides to remove an overscan noise, but this should not affect the question about 704 or 720 frame size?
Upscaling to 1280x720 in Hybrid.
The PAR has to be 1:1 of converted file.
After opening video file, making all X264, Filtering settings, the default crop/resize parameters are:
· Crop/Resize>Base: Input Resolution 720x576, Output Resolution 1280x720
· Crop/Resize>Base> LetterBox – checked (Width 1280, Height 720) grayed out, cannot be changed
· Crop/Resize>Base>Picture Resize> Auto adjust – height to Mode 8, Target Resolution 904x720 (720 is grayed out)
· Crop/Resize>Base>Pixel Aspect Ratio (PAR):
· Input PAR 1:1
· Force Input PAR type – unchecked
· Output PAR 1:1 grayed out
· Convert Output to PAR (checked, grayed out), Square Pixel (1:1)
Looking in to Vapoursynth code, left and right 188 pixel borders added, it means 904 + 2x 188 = 1280, it is correct value.
Since the video file’s PAR is not 1:1, it has to be changed to:
· Crop/Resize>Base>Pixel Aspect Ratio (PAR)> Input PAR set to 12:11
· Crop/Resize>Base>Picture Resize changes to 984x720, it 1.3666 ratio, not the 4:3
Vapoursynth code now shows 148 borders added, 984 + 2x 148 = 1280, looks like correct.
Do I have to crop frame to 704x576 to get the accurate 4:3 ratio, or 720x576 is the correct value?
Is Input PAR correct 12:11?
Is my workflow correct?
Another thing to ask.
I was trying to upscale to 1920x1080 following?
https://forum.selur.net/showthread.php?tid=1300
The Picture Resize, Target Resolution does not allow to change values to above 984x720.
What do I do wrong?
https://forum.selur.net/showthread.php?t...ht=picture
https://forum.selur.net/showthread.php?tid=1300
My video file VHS PAL capture to lossless HuffYUV with VirtualDub, 720x576 25i, DAR 4:3, PAR is not set in the header, but I assume it is 1150/1053 as it is from an analog content.
But in this case the calculated DAR would be 1.365, not exactly 1.33333 to reflect 4:3 ratio. This might be the case why cropping from 720 to 704 is recommended. It would be 704x576 with PAR = 1150/1053 resulting in 1.33, what is a correct 4:3 ratio.
But for the MPEG-4 based content PAR has to be 12:11, for 720x576 would result in 1.364, it is also not the 4:3.
It means 720x576 has to be cut to 704?
I am planning to cut some pixels on the bottom, on the sides to remove an overscan noise, but this should not affect the question about 704 or 720 frame size?
Upscaling to 1280x720 in Hybrid.
The PAR has to be 1:1 of converted file.
After opening video file, making all X264, Filtering settings, the default crop/resize parameters are:
· Crop/Resize>Base: Input Resolution 720x576, Output Resolution 1280x720
· Crop/Resize>Base> LetterBox – checked (Width 1280, Height 720) grayed out, cannot be changed
· Crop/Resize>Base>Picture Resize> Auto adjust – height to Mode 8, Target Resolution 904x720 (720 is grayed out)
· Crop/Resize>Base>Pixel Aspect Ratio (PAR):
· Input PAR 1:1
· Force Input PAR type – unchecked
· Output PAR 1:1 grayed out
· Convert Output to PAR (checked, grayed out), Square Pixel (1:1)
Looking in to Vapoursynth code, left and right 188 pixel borders added, it means 904 + 2x 188 = 1280, it is correct value.
Since the video file’s PAR is not 1:1, it has to be changed to:
· Crop/Resize>Base>Pixel Aspect Ratio (PAR)> Input PAR set to 12:11
· Crop/Resize>Base>Picture Resize changes to 984x720, it 1.3666 ratio, not the 4:3
Vapoursynth code now shows 148 borders added, 984 + 2x 148 = 1280, looks like correct.
Do I have to crop frame to 704x576 to get the accurate 4:3 ratio, or 720x576 is the correct value?
Is Input PAR correct 12:11?
Is my workflow correct?
Another thing to ask.
I was trying to upscale to 1920x1080 following?
https://forum.selur.net/showthread.php?tid=1300
The Picture Resize, Target Resolution does not allow to change values to above 984x720.
What do I do wrong?