Encoding deinterlaced footage

[meansizzler]

OK, this is something which I find confusing..

Have captured PAL interlaced content at 25fps it remains interlaced

When I encode I deinterlace, but what frame rate do I encode at 25fps or 50fps since the footage is now deinterlaced and therefore progressive?

Very confusing it is something most people would not normally think of, but this whole 24P, 60P makes you start wondering are people actually encoding videos at the right framerate thesedays...

[Badger0-0]

I'm not aufait with this myself, but I think 1080P@24 gives genuine 1080P 1920*1080 pictures. Upping to 1080P@50 more than doubles the data rate and is probably unnoticable to the human eye, at a guess.

I'd be interested in the answers to this too

[meansizzler]

well 24P is well 24P and program detects it at 24 frames a second progressive so I just encode it the same, or am I wrong and should it be 48 frames/s.., but that's a differne question want first one answered....

[senu]

Ill have to have think about this but from my limited experience, I actually leave things well alone leaving displays ( or external boxes) to deal with interlacing/ deinterlacing. On the PC I just leave software ( like VLC) to sort it out
I suspect the answer is far less simple than you think. It is format dependent and also depends where you want to display it
It may be too that some of the differences are not really detected by the eye
My experiments when I had a bit more time ( a little younger) showed it either didnt seem to make a difference or I got weird results depending on which display I used
The only place I have notice a difference in in the encoding of WMV where depending on playback method, deinterlaced material looks "jerky" but this only on a PC monitor , not an LCD HDTV display
I had a DVD player which upscaled ( it had a Faroudja chipset) Behaved well with Many displays.. had quite bad macro blocking with others..
You will get material to play with to your hearts delight very soon. I guess there is no better way of finding out by doing it yourself

[mmace]

personally I always de-interlace my footage as different software handles interlaced video differently.

If it's for DVD then I encode at 25fps. if it's for Blu-ray or mini HD-DVD then I encode at 29.9xxfps

[senu]

This is correct, software interpretation of interlaced footage varies and it is often better to de-interlace and let the software deal with the footage as it deems fit