Correct Field Dominance By Transcoding

[Lycaon]

Fixed 03-12-05 (later that evening): ReStream (http://shh.sysh.de/restream.html) worked like a charm this time. Switched the file to TFF and transcoding. Playback is perfect now.

UPDATE 03-12-05: Finally was able to recreate the result on the PC :) I used the CheckParity script for AVISynth and it replicated exactly what I had been seeing on the TV. So the GOP was never an issure nor the resolution. Now that I know what I'm dealing with, I can see if this is fixable through transcoding.

Here's a link to the file and I can't figure out what's causing the stuttering:
DailyShow.mpg (http://www.pocketmovie.org/Video/DailyShow.mpg)

I'm back to transcoding ripped DVB from my DishNetwork PVR and it seems the Set top DVD playback stuttering/shake problem is still present. It's most obvious during panning and fast moving sceens. I'm guessing it the GOP.

Programs I've tried to no avail, perhaps I'm doing something wrong:

-ProjectX
-pvastrumento
-Cuttermaran
-MPEG-VCR
-MPEGWizard
-VideoReDo
-ReStream
-ReJig
-Mpeg2Schnitt

[ChickenMan]

That MPG file has a resolution of 544x480, thats not a compliant dvd resolution, expect anything to happen during playback. You need to be 720, 704 or 352 x 480 to be compliant.

[Lycaon]

Thanks for the reply Chicken, however, the video doesn't shake all the time, and I’ve been able to re-encode anamorphic 544x480 and it played back fine. Therefore I doubt the DVB resolution is an issue per se. I am beginning to think it might be the short GOP. I'll post the GOP tomorrow morning.

[Lycaon]

Well, I'm having quite the discussion here with myself. I'll try not to digress. I went over the TMPG Procedures Guide and did the Field Order Test. Turns out the field order is INCORRECT. The PVR Rip sets it to Bottom first when it needs to be top first. I know of two utilities that allow you to adjust the field order and transcode:

1: ProjectX
2: Restream

I'll burn a copy and see if it works (fingers crossed)

I give up at this point. Now upperfield first seems to be wrong too :rolleyes: I even tried a frameserved CCE encode and it still jittered every other second. Please let me know if anyone has some other ideas.

[ChickenMan]

I dont normally repeat myself, but simply 544x480 is not a DVD compliant size. Any DVD Player is not expeted to play this back error free. Until you reencode it to 720x480 or 352x480 there is no way it will always playback flawlessly. You can play with GOP's until your blue in the face, but until the final dinesions of the clip are compliant your going to have problem.

[Lycaon]

Chicken, as I said before, I've encoded 544x480 before and it played back perfectly. The frame size is not the issue. I have a reencoded DVD here at 720x480 of the exact same clip and it has the exact same problem. I don't think the GOP is the issue either, which is what I said in my previous post. I think the problem has something to do with the Field order, I just haven't found a program that can fix it though transcoding.

The last thing I tried was re-encoding with CCE, once with Top Field first, Offset=1 and another without Top Field first, Offset=0. That time the re-encode worked to fix the stuttering, however, the interlacing isn't clean, it blurs the image now. So I think I'll choose one or the other and stick with it, unless there are some better ideas out there.

[Lycaon]

:D Here's to trial and error. Once the problem was narrowed down to a frame dominance issue, I decided to re-evaluate. After a clean install, I went straight to ReStream with a demuxed M2V file. I checked off the box to flag the file as TFF and transcoded. Muxed with infoedit and burned with Nero. It's perfect now. No shaking what so ever :D