Question / Help Deinterlacing

[david-1984]

Hi, I will have a stream of a big event where there will be the national TV doing the service. They will provide me a SDI cable with a signal 1080i.
Due to the fact that it is interlaced do you suggest to stream in 1080p or 720p?

What kind of deinterlacing filter should I use in your opinion?

Thanks
David

 

[carlmmii]

Stick with 1080p. Use yadif (2x).

 

[david-1984]

thanks... do you have also a technical explanation why is better to stay with same resolution? Appriciate your support

 

[carlmmii]

Any interlacing artifacts that will be left over from the deinterlacing process are better left at the native resolution. Once you scale it down by a factor, you will end up with a moire effect that's going to follow the scaling ratio.

i.e. from 1080p to 720p, that's a factor of 3:2. That means any interlacing artifacts are going to result in a period of 2 pixels in the 720p rescale. It's much worse the further the scaling factor is from unity -- if say you were rescaling to 1600x900, that would be a scaling factor of 6:5, resulting in a period of 5 pixels. That is much worse than just dealing with any kind of artifacting at the original resolution.

 

[david-1984]

Very appriciated. thanks.

Now I have a second doubd... that I dind't thought before... I will have to go on facebook and youtube. I'm afraid that FB will not acept my 1080p :-(
Is this true?