Jittering when converting with CCE. Widescreen's fault?

[igornt]

Hey all. Suddenly faced a problem. My output mpeg is jittering when I play it on TV using Hollywood MPEG decoder. Yes, I know, it is fields! SInce it is a DV source captured with DVRaptor, it is interlaced video with the lower field going first. When I encode it with CCE through Avisynth, I leave Upper Field First setting checked. This is the way it should be, this is the way I have done it hundreds of times. Never had a problem before. Now, I do. Video jitters. I tried to play with setting and practically tried all field settings both in Premiere and CCE that existed -- about 30 different option. It still jitters. Damn!!!
Recently, I read somewhere that this jittering may have been caused by frame resizing! As my original video is widescreen with frame size of 1024x576, and the source video for CCE should be 720x576 with Widescreen flag in it, it basically means that Premiere does resizing. And resizing is something that screws up field order and produces this annoying jittering. Can anyone share a solution?
One of them could be doing resizing in VirtualDub. However, I want to keep a Premiere project without exporting it to a separate video, but using only frameserving. I understand, I can hardly do Avisynth frameserving to VirtualDub followed by frameserving of the same project to CCE. And it is a big project of about one hour.
Thanks in advance to those who could help. Cheers.

[igornt]

I think that I figured it out. It was a problem of resizing when I converted 1024x576 widescreen frames to 720x576 widescreen frames, using Premiere. The problem was gone, when I used TMPGEnc. The latter resized properly, and field went smoothly. I think it was my first and last experience with widescreen. Although it does look great and professional (especially with subtitles down on the black bar), but it prevents you from using CCE. TMPGEnc is great, but is still number 2.

[Truman]

Do not use the Premiere resize filter. Resize with TMPG, VirtualDub, Avisynth, AviUtl or whatever and frameserve to cce.

[igornt]

Thanks, Truman. So if I frameserve from a Premiere project, would the following be the correct Avisynth script to resize from 1024x576 to 720x576 preserving the 16:9 aspect ratio?

IPCSource(filename).BilinearResize(16,9,1024,576,7 20,576)

or would it simply be

IPCSource(filename).BilinearResize(1024,576,720,57 6)

Many thanks!

[Truman]

IPCSource(filename).BilinearResize(720,576,0,0,102 4,576)

The 16:9 DAR flag will be added by CCE itself. encode settings > video > aspect ratio: 16:9

[igornt]

Thanks again, Truman. I have tried various options and even simple

IPCSource(filename).BilinearResize(720x576)

does a nice job and keeps the proper aspect ratio (of course, with DAR 16:9 added in CCE). I am back to Widescreen!