Should i use lanczos resize or lanczos 4 resize

[ConanEdogawa]

I crop the black borders from my video and then deinterlace with qtgmc to mp4 4:3 aspect ratio. I have been using lanczos4resize everytime i do this just wondering should i be using something different here is some info on a file i was about to do i also so this with 16:9 videos from time to time should i be using a different filter for that

Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 4.00 GiB
Duration : 18mn 25s
Overall bit rate : 31.1 Mbps


Video
ID : 0
Format : JPEG
Codec ID : MJPG
Duration : 18mn 25s
Bit rate : 29.8 Mbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 3:2
Frame rate : 30.000 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 2.876
Stream size : 3.84 GiB (96%)


Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Duration : 18mn 25s
Bit rate mode : Constant
Bit rate : 1 411.2 Kbps
Channel count : 2 channels
Sampling rate : 44.1 KHz
Bit depth : 16 bits
Stream size : 186 MiB (5%)
Alignment : Aligned on interleaves
Interleave, duration : 999 ms (29.98 video

[jagabo]

If your source video is already sharp either may result in oversharpening halos.

[ConanEdogawa]

If your source video is already sharp either may result in oversharpening halos.

I did use a sharpen filter so it is sharp i just hate the black lines so i crop them out all the time. What should i do not crop at all ,turn of the filter or something else

[jagabo]

Cropping away letterbox or pillarbox bars has nothing to do with whether you want to sharpen or not. (Although, if you sharpen an image with black bars you can get halos at the junction of the picture and the bars.) If you're explicitly sharpening your videos, AND using a sharpening resize filter, I suspect you're oversharpening. That can look ok when viewing a small image but it becomes annoying when watched on a big screen.

Here's an example of oversharpening halos from a VHS deck:
https://forum.videohelp.com/threads/361379-VCR-Hi8-capture-tests-help-evaluate?p=229264...=1#post2292646

A small, slightly oversharpened image:


A small section of that imaged enlarged 8x with a point resize so you can see each pixel (each 8x8 block is one pixel in the original image):


Notice how there's a bright band around all the dark lines. And how there's a bright band and a dark band at the shaded edge in the eye. A TV wouldn't use a point resize, of course. But it would probably use a bicubic or sharper filter. That would further exacerbate the halos.

[ConanEdogawa]

Yea i have been totally oversharpening my videos i use the sharpen filter in dscaler and with qtgmc i put sharpen to 1.0 i also use s-video input so it was total overkill. Im going to have lot of settings to mess with.