Motion stripes on squeezed file

[Jelena]

I am trying to squeeze a 1 hour wedding film from Avid Xpress Pro in Sorenson Squeeze 3.5. The Quick Time refernce file exported from Avid looks fine, but after it has been squeezed, high action frames in the movie appear jaggered (from the help file in Sorenson I think the correct term for this is motion stripes).

Can anyone tell me what I should change my squeeze settings to to correct this?

Many thanks!!

[BJ_M]

compress to what - and from what source ?

and for what purpose ?

[drewzor]

At a guess its DV (avi) which will be interlaced footage.
Another guess is your previewing your edit on your computer which displays each line progressivly.
This is why areas of high motion look jaggered because its displaying 2nd field at the same time as the first. Burn your edit to dvd and it should look fine on a tv or change your exported video to progressive.

Or maybe its not that at all?

[Jelena]

Thanks for the reply. I have selected no interlacing as recommended by Avid when squeezing the file and have also selected the progressive option.
The footage exported from Avid is fine. It appears jaggered in Sorenson Squeeze after I have squeezed it and is also jaggered when the film has been burn't onto a DVD.
Any other suggestions on what this could be and how to fix it? I would have thought that if the raw footage is fine, it should squeeze and burn to DVD without this problem.
Thanks!

[BJ_M]

if the source is interlaced - leave it interlaced .. no reason to convert to progressive ... which will reduce quality ...

AVID would suggest to convert to progressive if for web viewing or future film conversion .. not DVD ..

squeeze uses the mainconcept mpeg encoder ,,,, which is alright for this .... AVID 's deinterlaced though is poor (in this product anyhow) ..

[Jelena]

Apologies, typo on the previous entry. I was previously running the squeeze on the setting of none for deinterlacing.
Other compression settings selected for the squeeze are: elementary streaming, video output at mpeg 2, data rate at 6570 kilobits/sec, frame rate at 25, constant bit rate, and an i-frame rate of 15 frames.
Not sure what other settings to choose to avoid having the squeezed file jagger.

[edDV]

What are you trying to do?
1hr will fit to an interlace DVD nicely at high quality.

Just encode it as 576i MPeg2 around 9000 Kb/s CBR (lower field first).