telecide?

[gantengx]

Hi guys

i got progressive pal video, and i use telecide(order=1) to remove the interlacing artifact, what i want to ask do i actually lose some detail or not? coz if you use bob u got 50fps and telecide i still got 25fps, actually i dont really understand the concept, i read it but dont really get it...anyone can explain? thankss

ehm, the other thing, how about the FieldDeinterlace() from decomb filter? do i lose detail or not? heheh

btw, last time i tried to use smooth deinterlace and the author suggest me to use kerneldeinterlace plugin, is there any difference between them? sometimes i'm confused which plugin should i use... help pls thx hehehehe :D

[Guest]

i got progressive pal video, and i use telecide(order=1) to remove the interlacing artifact, what i want to ask do i actually lose some detail or not? If it really is progressive content and you see combing throughout the video (and not only at scene changes), that can only mean that the fields are shifted, like this:

. a b c d e
a b c d e . Applying a field matcher such as Telecide without postprocessing [Telecide(post=0)] just realigns the fields without changing them:

a b c d e
a b c d e So there will be no loss of detail. But if you enable postprocessing then detail can be affected in areas where the normal picture detail looks like combing.

You need to be sure that your video is really progressive. Try with Telecide(post=0) option first. If you still see combing, then your video is either not really progressive as you think, or it is field-blended. You also may see combs just at scene changes, due to bad edits.

actually i dont really understand the concept, i read it but dont really get it...anyone can explain? I've gone to a good deal of trouble to explain things in the manual. Was there something specific that you are having trouble understanding?

the other thing, how about the FieldDeinterlace() from decomb filter? do i lose detail or not? Areas of pictures that get deinterlaced will lose detail. But FieldDeinterlace is able to avoid touching progressive pictures, if the options are set correctly.

btw, last time i tried to use smooth deinterlace and the author suggest me to use kerneldeinterlace plugin, is there any difference between them? Yes.

sometimes i'm confused which plugin should i use You need to start by learning and understanding the basic concepts. Have you ever visited www.100fps.com?

[gantengx]

thanks it's really helpful reply hehee

anyway, i was just thinking about the field thing, for interlaced frame, you put 2 different fields (odd & even) on 1 frame right? that's why you can see combing effect. is it correct? i read it from 100fps.com but how about progressive? do you put 2 fields as well? is it different field or same? if it's different then what's the difference with interlaced one? that's the point that i dont really understand...

btw what's the difference between smooth deinterlacer and leakkerneldeinterlacer? i'm confused which one should i use

btw fielddeinterlace on decomb plugin is it gonna lose any information if i use it for real interlaced source?

[Guest]

anyway, i was just thinking about the field thing, for interlaced frame, you put 2 different fields (odd & even) on 1 frame right? that's why you can see combing effect. is it correct? Not quite. See below.

i read it from 100fps.com but how about progressive? do you put 2 fields as well? is it different field or same? if it's different then what's the difference with interlaced one? that's the point that i dont really understand... The top field shows the even-numbered lines and the bottom shows the odd-numbered lines. If the top and bottom fields are sampled at the same moment in time, then there is no change in the picture, so we call it "progressive" content. The fields are different, because one is even and one is odd, but (this is the key part) they are sampled at the same moment in time, so you don't see combing. If, on the other hand, we sample a top field and then wait some time to sample the bottom field, then the picture being sampled has time to change, so the fields can show content from different pictures. This is what we call "interlaced" content.

So combining fields doesn't create combing unless the fields are sampled at different times and there is change in the scene between the field times.

btw fielddeinterlace on decomb plugin is it gonna lose any information if i use it for real interlaced source? Combed areas that get deinterlaced will lose detail. Non-combed areas will not.

[gantengx]

oow..ic.... ops sorry bout the fielddeinterlace, i didnt read it hehehe...so


a c e
b d f

is it how interlaced one work? and for progressive

a b c
a b c


is it correct? so field 1 and field 2 in progressive is different fields but taken at same moment so basically the image on field 1 & 2 is same. correct? so if it so, does it mean that progressive need more frame to show pictures than interlaced? (i mean if you see the code, interlaced need 3 frame to display the 'f' and for progressive 3 frame you only display until 'c') is it correct?

[Guest]

Sort of. The technical way to say it is that interlaced content has greater temporal resolution. It shows more different pictures in a given period of time. That's why people say interlaced is "smoother".