Can an expert look at these settings and tell me why...

[mparkes]

I ripped a NTSC DVD and encoded it to SVCD - using tmpg - the resulting SVCD looks nice on my player but the picture jerks a little every second or so... plays okay on my PC though... so, I ran the original VOB through bitrateviewer to see what it looks like and the results are:
+++
Stream type: MPEG-2 MP@ML VBR
Resolution: 720*480
Aspect ratio: 16:9 Generic
Framerate: 29.97
Nom. bitrate: 9800000 Bit/Sec
VBV buffer size: 112
Constrained param. flag: No
Chroma format: 4:2:0
DCT precision: 10
Pic. structure: Frame
Field topfirst: Yes
DCT type: Field
Quantscale: Linear
Scan type: ZigZag
Frame type: Progressive
+++

I ran bitrateviewer on my SVCD mpeg2 file and it shows:
Num. of picture read: 68033
Stream type: MPEG-2 MP@ML CBR
Resolution: 480*480
Aspect ratio: 16:9 Generic
Framerate: 29.97
Nom. bitrate: 2093200 Bit/Sec
VBV buffer size: 56
Constrained param. flag: No
Chroma format: 4:2:0
DCT precision: 8
Pic. structure: Frame
Field topfirst: Yes
DCT type: Frame
Quantscale: Nonlinear
Scan type: ZigZag
Frame type: Progressive
+++
I had encoded DVD2AVI using forced film so I am surprised that its telling me my framerate on the SVCD is 29.97 - the other difference that I am not sure is significant is that the DVD showed the "DCT type" as FIELD and QuantScale as linear, yet my SVCD shows FRAME and nonlinear respectively - could these or other settings cause the picture "jitter" I am seeing on my player? Thanks for any help!

[bugster]

Not sure but you could try this. I have found from experience that TmpGenc is not good at applying 3:2 pulldown flags and the resulting video can look a little jerky. Therefore you could try using pulldown.exe to work around this. Can't say I have tried this or even be sure it is possible but here is my idea.

The original DVd is most probably NTSC film (23.97 fps) with 3:2 pulldown flags to make it play as 29.97 fps. After you have ripped your DVD, demultiplex audio and video into seperate files. Use pulldown.exe with -norff switch to remove the pulldown flags from the video. Encode video only with TmpGenc at 23.97 fps. Use pulldown.exe again on the resulting .m2v file to re-apply the pulldown flags. Multiplex back in the audio and burn.

As I said, this is just an idea off the top of my head and I would be very interested to know your results if you decide to try it.

Good Luck

[mparkes]

THanks, I may try your suggesstion
I burned another test and fixed the bitrate at 2048 and it played fine. Maybe my BR was too high before? I am watching on a hacked Shinsonic 3838 so maybe the bitrate is more of an issue than with other "legitimate" players :)