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5 paź 2024 · Digital and analog television standards resolution reference. - television_resolution_standards.md. Digital and analog television standards resolution reference. - television_resolution_standards.md ... S-VHS: 480 × ~530 (NTSC) 4:3 ~192,000: S-VHS: 576 × ~520 (PAL/SECAM) 4:3 ~230,400 ~ = horizontal resolution is an approximation based on the ...
Usually for VHS you should use PAL: 704x288 or NTSC: 640x240. The key is to use half vertical size (VHS only have half of vertical anyway), that will save a lot of realtime process and will avoid all interlacing problems (no need to deinterlace later).
However, I highly, highly recommend upscaling to 720p @60fps. Many capture devices (or the MPEG-2 method described above) capture at DVD resolution, which is 720x480. If you haven't done the math, 720x480 is not a 4:3 aspect ratio.
The resolution of NTSC is going to be very precise for your scan lines but vary for horizontal resolution. VHS is probably more similar to a 500 pixel horizontal resolution but other NTSC formats, like Hi8, or S-VHS, will require about 720 pixel accuracy.
If you’ll be digitizing your tapes for use on a modern device (like a computer or a phone) use one of these for the “Output (Scaled) Resolution” setting: For NTSC, type in 720×540. For PAL, type in 768×576.
If your VHS tapes were recorded in LP or SLP, you can probably bump down the horizontal resolution to 640 or even less and see acceptable results. Chroma subsampling is another thing to discuss, however NTSC color resolution is atrocious, so 4:2:0 will be more than adequate.
ntsc-rs is a free, open-source video effect, usable as a standalone application and as an OpenFX and After Effects / Premiere plugin, which accurately emulates analog TV and VHS artifacts. It is written in Rust, and is multithreaded and SIMD-accelerated.
