best deinterlace speed settings

[xrv1138]

anyone carried out tests to see what speed hits and quality using deinterlacing gives using the various methods ?
wouldnt mind some data on this.
im doing 2 interlaced dvds at the mo using telecide(pal) deinterlacing.
will post the speed hits back soon.

[xrv1138]

using telecide(pal)
drop on one machine from 1.15 RT to 0.63
drop on second machine from 0.76 to 0.46

using separatefields/selectevery (pal) drop 1.15 to 1.10 (negligible)

any other data would be appreciated
especially which methods create blurring and to what extent.
i appreciate that using telecide(pal) would give the best result as already posted in this forum
just want to get the best speed/quality sweet spot :)

[SiliconSoul]

when do i need to deinterlace? with american pie 2 i think i did because of how crappy the output looked if i did not deinterlace!

is there a sure fire way to know?

[xrv1138]

SiliconS

i am in no way an expert on interlacing so i am open to corrections here

interlacing is a way of compressing video data and was originally used for tv signals due to limited bandwidth
in effect in 2 successive frames, the first basically holds the info for lines 1,3 etc and the second holds info for 2,4 etc.
this seems to give playback errors after encoding without deinterlacing which are distinct horizonatl lines especially noticeable with anything that is moving.
according to information that i can gather, interlacing is very rare for ntsc and reasonably common for pal dvds. more reading suggests to me that in fact interlacing is not used that often for pal dvds but the vob files often are flagged as interlaced even though the data is progressive. seems like i have just processed such a dvd.

according to posts in this forum an interlaced svcd should be fine on your standalone but with those lines on a pc monitor.
my standalone shows the lines so i have to deinterlace if the source is interlaced and not just flagged as such.

to check if a dvd is interlaced
first rip the vobs to the hdd using dvd2svcd internal routines
you can cancel dvd2svcd by pressing the close 'x' on dvd2svcd once it has started to rip the vobs.
then use either bitrate viewer (http://www.tecoltd.com/bitratev.htm) or dvd2avi (installed with dvd2svcd) to examine the vobs.
i dont know if these programs look for flags or at the actual video data, however, the last dvd i processd both of these said the source was interlaced and i did not deinterlace and the result is fine, so go figure.

if you want to be sure rip a small chapter with movement in it.
process it and test on your pc and standalone(using a cd-rw if u can).

personally now
i look to see if its interlaced with those programs just for statistics sake
then i test a chapter if the programs say its interlaced.
they last way is to just do the whole encode and check it when its finished if u have lots of time and dont care too much.

[SiliconSoul]

okay want to hear something funny.... on the original vobs it says progressive... but when u preview it in dvd2svcd it has those horizontal lines on the edges of moving things... the CCE_Encoded_Video_NTSC.mpv show progressive and does not have the lines... the Pulldown_Encoded_Video_NTSC.mpv has the lines and constantly switches from progressive to interlaced! as does the muxed mpeg (which should be the same anyway)

i did a smart deinterlace on the save movie first vob file.. ( i can not find the option to select chapters in the newest build of dvd2avi) and the end result has it where it chagnes from progressive to interlaced every other frame too and it has those lines.... but all this is only in dvd2svcd... i do not see them while watching if i deinterlace or not. with powerdvd or standalone!

im just trying to figure out when i know to use deinterlace and which one!

so im not sure what that tells us....

the movie is save the last dance.

[xrv1138]

sounds like a tough movie
think if it was that hard i'd go and buy an extra dvd as a back up ;)

last three dvds ive done indicated interlaced in bitrate viewer and using dvd2avi
but i have used deinterlacing
and the results have all been good in powerdvd and on my standalone,
go figure :confused:

[Kedirekin]

Just some clarification...

on the original vobs it says progressive...
They probably are.

but when u preview it in dvd2svcd it has those horizontal lines on the edges of moving things...
I believe if you turn on Force Film, DVD2AVI won't show the combing; preview honors the RFF/TFF flags when it is set to None, but ignores them when set to Force Film.

the CCE_Encoded_Video_NTSC.mpv show progressive and does not have the lines...
Probably because DVD2SVCD set DVD2AVI to use Force Film - 'nuff said.

the Pulldown_Encoded_Video_NTSC.mpv has the lines and constantly switches from progressive to interlaced!
Exactly as expected after pulldown. Pulldown adds RFF/TFF flags, and (properly?) changes the stream to hybrid (the rapid switching back and forth between progressive and interlaced). Again, if you turn Force Film on and preview, I believe you shouldn't see any combing.