Jerky SVCD, smooth VCD

[djnibler]

I've made so many coasters, I could build a house with them. I'm fed up, so I'm asking for help. I have an AIW card, MMC 7.6, and using the full version of TMPGenc, and also Virtual Dub. I record an AVI file using MMC 7.6 that is 30 minutes long, then frameserve it to TMPGenc so I can encode to SVCD mpeg2 and to VCD mpeg1. The resulting files look fine when played on my PC (in WinDVD), and the VCD looks fine when played on my DVD player, however, the SVCD is very jerky any time there are motion scenes. I have the motion search quality turned up as high and slow as it will go in tmpgenc. FYI: I'm using PIC videos motion jpeg compressor on the capture of the avi (which works fine).

Why would the SVCD be jerky, and VCD be fine? Why would the mpeg2 file not look jerky on the PC, but look jerky on my DVD player. I drop no frames on the capture. I even tried skipping the frameserving and just going from avi right to SVCD, but the same thing happens so it's not the frameserving. The first time I tried this, it worked.... and the first time I tried it, I captured the show I recorded from my VCR manually onto my computer through the component video, whereas this time, I am setting MMC to record the show in the middle of the night. Could it be some problem with the scheduled recording in MMC? I tried recording TV manually in MMC, then encoding the resulting avi file to SVCD, and it seemed to look fine (when played on my DVD and my PC)... which means that the only difference between that avi file and the one that is producing jerky SVCDs is the timed recording.. doesn't make sense.

Thanks in advance for any advice/help!

Jeff

[acornish]

I have noticed with TMPGEnc that highest quality produces a better picture, but jerkiness, and some temporary audio slip.

I tend to go with "high quality", which seems to give better results.

[Patric]

I have the same problem if I render the movie with the default bitrate.

Try reducing the bitrate to 2150, also use Automatic VBR (CQ_VBR).

That should do the trick.

Cheers

Pat

[djnibler]

Thanks for the replies! I will give it a shot.... I am using a bit rate of 2520 with CBR. I use CBR because the show I record is only 30 minutes in length, thus I have no worries about size. I figured CBR would be faster to encode, and would be as good as, if not better then any VBR or CQ setting. I will drop my bit rate down to 2150 to see if that helps it any.

What still gets me is that the VCR episode I transfered to avi looks perfect on SVCD, no jerk. *shrug*

Thanks again


Jeff

[djnibler]

Welp, I gave it a shot and it's still jerky.... the file looks fine and dandy in WinDVD on my PC though. Oh well, perhaps the timer-recorded avi capture with MMC has a problem.... that's the only thing I can think of. AVI files that I record manually with MMC work fine, and the manual record and timer record are using the same settings. I just hate going from vcr to avi since I'm losing quality there, when I should just be able to get it right form the cable.

Jeff