problems with captured material

[awe007]

hi,

i´m in big trouble with my captured material. i captured some historical docu´s from tv (pal, captured with 704*576).

i encoded the movie with dvd2scvd/cce and made a new svcd. everything works fine.

in a next step i changes some values due to the overscan.

therefore i changed the bicubicresize(480,576,0.0,0.6) to bicubicresize(448,544,....) and added the line AddBorders(16,16,16,16). now the complete movie looks realy awful. it is flickering and looks like the field order isn´t correct (although i think i can´t be a field order problem because i changes the values from automatic to b to a and there are no differences) or something similar. i don´t understand where the problem is because i used this method for all my movies and i hadn´t any problems with it.

to put it in a nutshell as i use resize with 480*576 everything looks fine. as soons as i change to 448*544 with addborders (nothing else was changed) the movie looks awfull with a mix of flickering/unsharpe pictures (when there are fast motions)

i would be very happy if someone knows help for this problem...

frank

[Si]

You are probably trying to resize true interlaced video and to do that you have to separate the fields, reduce them in size separately and then put them back together again.

One way is to do :-

SeparateFields()
Bicubicresize(448,272,0.0,0.6) # because each field is 288 in height
Weave()
Addborders(16,16,16,16)


regards
Simon

[awe007]

hi simon,

thx for the help. i just changed my avs script in the way you mentioned and yes :) it works and solves the problem. sorry for the question but i´m new to this stuff and didn´t know that you must seperate the fields for resizing true interlaced material. unfortunaley i still don´t the understand the problem. does the resize command destroy the filed order or where is the problem. i thought the only thing to do is to tell the cce that it is dealing with interlaced material instead of progressive material...

thx

frank

[Si]

Each field in a true interlaced video comes from a separate moment in time and must be played back in the correct sequence (normally top field first in a PAL DVD player)

If your going to play it back on an interlaced device (TV) then you need to make sure that each field is kept separate during filter processing.

By resizing the whole picture vertically (horizontal resizing doesn't come into this), you effectively merge the 2 fields together and some information from the original top field can effectively be transposed into the bottom field of your output.

regards
Simon

[awe007]

hi,

thx for the information. now i understand the problem with field order and the problems when resizing the interlaced material..

thx

frank