PDA

View Full Version : Dv --> Dvd


vortexer
15th July 2002, 19:40
hi guys...

I use premiere 6 to cut my DV videos.

1)
If I slow down some parts, then I have to change some settings to deinterlace the movie. is there any other possibility?

2)
But if I change the speed of some parts to - let's say 200% - then the output is not smooth at all ON TV!!!
do I have to deinterlace the clip too? (I haven't tried yet!)

By the way: I use cinemacraft 2.62SP to encode the movies.
with the following settings: DVD compilant, upper field first, progressive frames, add sequence end code.

and what is the best codec to mix interlaced and non interlaced movies? or what is the best for deinterlacing? (I'm sure someone else has already asked that... I will have a look at the search function later :-)

thanx.

ulfschack
15th July 2002, 23:13
Hi

Do you have a DV cam that takes progressive film? My guess is you don't ...

You should never ever deinterlace when converting from DV to DVD.

Seeing as you check "prog frames" in CCE a good first try would be to uncheck this option (keep the "upper .." tho)

cheers

vortexer
15th July 2002, 23:35
no, the cam does not take progressive pictures.

but the funny thing is: if I disable the "progressive option" in the cinemacraft encoder, my film is NOT interlaced! and with that option enabled, the movie IS interlaced as the source is... and in my opinion the quality is much better on tv with that...

funny uh?

ulfschack
16th July 2002, 00:52
I would go as far as saying that the quality IS better on the telly with interlaced. I don't think it's a matter of opinion. About the reversed correlation concerning prog on or off there seem to be something very suspicious, or rather it shouldn't be that way at all.

Most of my DV material is encoded with Tmpegenc, some of which I've succesfully "slowed down" in Premiere. The few pieces I've done in CCE I haven't used such effects so I can't tell you if it's an encoder specific problem, but I am sure that TmpegEnc will handle it.

When you ask about CODECs for interlaced or non-interlaced material the best tip I can give you is to encode them in pieces and let the auhoring program do the linking between mpegs. BTW when speaking of Mpeg-2 (DVD) we (or a least I) don't use the word CODEC ... it's for avi:s

For deinterlacing I would try GreedyHMA (from TR Barry). But only use it for computer video ... please.

cheers

EiGuscheMa
16th July 2002, 15:08
vortexer,
scaling the timeline on interlaced material with AP6 is always somewhat tricky because AP6 is not a compositing tool (like AE or comb***ion). The possible combinations of project settings, video settings and filters produce results that are hard to predict, despite of the CCE settings....
AP6 reverses the field order if speed is below 100%, for example.
And even if you select frame blending the result will be "jumping" if speed is below 50% (Because of ABAB or AABB field order)
Compositing programs have a "interpret footage" dialogue that lets you specify field order and motion detection. They use full detailed frames (made of both fields) internally that are much better to process and can interlace the output afterwards.
You may want to look for a tryout of such a compositing program

hope this helps

vortexer
16th July 2002, 19:45
yes that should help!

first I will try to change some settings in the cinemacraft encoder
if that does not help, I will try some settings in premiere
and if that does not help too, I will try AE or combustion or nothingreal shake :-) I'm sure one will do the job.