If I record 1920x1080i at 60i and render at 30p, is it 1080p?

[GregPorter]

I have a capture device (Hauppauge HD PVR) for capturing videos from my Xbox 360 (and any other anologue/component/composite device) and it can record a maximum of 1080i (1920x1080 pixels at 60fps interlaced).


Say I set it to record 1080i, set the xbox to 1080i and capture a video.
Then I import it into Sony Vegas and re-render the file at 1920x1980 with a framerate of exactly half the framerate of the video, and also set it to deinterlace..

Is this techically 1080 progressive frames or is it just some sort of mashup of both and forced to run at 30 frames instead of 60?

I'm familiar but not very knowledgable on the whole FPS, deinter/interlacing and such.

Basically, if I convert a 60i video to a 30p video (and it is of a 1920HD resolution) does it count as being 1080p?

 

[Ian-T]

That all depends on whether you save it at 1080p or not. If you do what you said in your very last statement then yes...it's 1080p. I think maybe what you want to ask is if it has the same resolution. I believe you would have to deinterlace the footage to obtain 30p and in doing so you lose about 20% resolution (not perceptible however).

 

[GregPorter]

What would be the best way to get the maximum quality, resolution and such out of a 1080i file, it's also compressed so naturally it isn't always going to look crisp but I still want to maximize what I can get out of it.

It saves as M2TS files if that helps and can max out at 13.5Mbp/s.

 

[JeganRX]

I have a capture device (Hauppauge HD PVR) for capturing videos from my Xbox 360 (and any other anologue/component/composite device) and it can record a maximum of 1080i (1920x1080 pixels at 60fps interlaced).


Say I set it to record 1080i, set the xbox to 1080i and capture a video.
Then I import it into Sony Vegas and re-render the file at 1920x1980 with a framerate of exactly half the framerate of the video, and also set it to deinterlace..

Is this techically 1080 progressive frames or is it just some sort of mashup of both and forced to run at 30 frames instead of 60?

I'm familiar but not very knowledgable on the whole FPS, deinter/interlacing and such.

Basically, if I convert a 60i video to a 30p video (and it is of a 1920HD resolution) does it count as being 1080p?

This largely depends on a few variables:

Is the content you're recording a game? You mention a 360 so I'm guessing so.

Does the game run at 30fps or lower? If so, it will largely be rendered progressive, and simply output PsF to fit in a 60i (1080i) signal. Visually, it should still be progressive even to your recorded.

If the game runs at 60fps, and the console is set to run at 1080i, it will likely interlace the video in a traditional sense (ie, there are no frames, only fields) upon output. Your SD output should then be 480i in order to maintain motion. DO NOT DEINTERLACE IT!

Technically though, yes you can just deinterlace the captured video if it's 60i, to 30p, and simply downscale it to SD resolutions. The motion will be halved (deinterlacing will do this unless you bob the motion to 60p, which will still lose some vertical resolution.... and on top of that both the Blu-ray spec and DVD spec don't support 60p anyway!).

Judge your options based on the video output. Even if your recorder claims to only do 1080i, it may still be good enough if the video output is 30PsF.