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What's the idiomatic way of saying this?
Example:
640p refers to the pixel count width wise.
What's the most grammatical, idiomatic way of saying this?
When colour photography first became possible, we would describe a film as being in colour... and old films were in black and white.
I think that the image resolution is a similar property, so one could say in 640 p. You could also simply say that the picture is 640 p.
Of those sentances the one with "in" looks the most idomatic to me. However.
640p refers to the pixel count width wise.
Umm no.
When talking about video the number before the p or i (BTW p is short for progressive not for pixels) refers to the vertical resolution, not horizontal. 640p is not a common/standard resolution. The normal values are.
The corresponding horizontal resolution is less-well defined. Traditionally analog video was not formed of pixels, the video was split into discrete "lines" but the variations within each line were a continuous analog signal.
Digital systems clearly do have pixels but the number varies. On a square-pixel system it will depend on the aspect ratio (4:3 or 16:9) but there are also "Anamorphic widescreen" systems with non-square pixels.
