Jumpy Video with TMPGEnc

[sonny8888]

When using TMPGEnc (I have tried different versions) to encode a movie to either MPEG1 or MPEG2, they both are jumpy during moving scenes. I can use the default templates or modify my own with no luck. I even change the "motion estimate search" to Highest Quality but it is still jumpy. Any input would gladly be appreciated!!!!

[DJRumpy]

Check your 'Field Order' setting under the Advanced tab. Try changing it. Encode a small clip and see if that helps.

[snowmoon]

The other problem could be frame rate mismatch. If you input frame rate != output framerate you will get tiny pauses during motion.

[DJRumpy]

Righto. Sonny, do you know what the framerate of your input file is? If it's an AVI, you should be able to right click it, and select properties. The infor is usually under the ADVANCED tab. If it's an MPEG, you can grab the info using TMPGenc: FILE | MPEG TOOLS, and go to the DEMULTIPLEX tab. Add the MPEG (assuming your source file is an MPEG),and it will tell you the frame rate, and audio information in your mpeg stream. Make sure you cancel out of this screen when your done.

[sonny8888]

I tried re-encoding the video (By the way, I am using DVD2AVI and using the .d2v and .wav files from a ripped .vob) selecting both "field A" and "field B" with the same jumpy results. Also, I checked the framerate of the .vob file and it is 29.97 which is the same as the default template settings.

[DJRumpy]

Sonny, try previewing your VOB with DVD2AVI. Watch to see if 'Progressive', and 'Interlaced' flashes while previewing. Your source file is probably Telecined. Use the setting "Forced Film' to keep the source file's 23.976 frame rate if this is the case. TMPGenc should properly handle the 3:2 pulldown flags when re-encoding.

[sonny8888]

When I previewed the .vob with DVD2AVI it said the video type is Film 99% and the frame type is progressive. Because it was progressive, I the video source type to "non-interlaced (Progressive)" in TMPGEnc and got better results. The jumpy video is hardly noticeable, but not gone!

[DJRumpy]

How many frames per second is the source file?

[sonny8888]

Even though the source file says it is Film, the FPS is 29.97. I thought that Film is 23.976 so I am a little confused.

[Treebeard]

select video -> forced film in dvd2avi

now save project.

now in tmpgenc select the super videocd(ntscfilm) template.

that should get rid of the jerking.

[kayfam]

23.976fps + 3:2 pulldown = 29.97. You need to apply the force forced film setting in DVD2AVI.

[sonny8888]

I will try the Forced film option to see if it gets rid of the jumpyness although I am encoding into DVD format instead of SVCD since the movie was too big for a DVD+R

[mcdermd]

You'll want your *rendered* mpeg to be FILM fps also. So make sure that the first settings page in TMPGenc has it rendering with Frame Rate=23.976 fps (internally 29.976fps) and Encode Mode=3:2 pulldown when playback.

This will force the DVD player to interlace it and keep your mpeg file smaller (by cutting out 5 fps).

[DJRumpy]

Sonny, since your source says it's film, then the actual framerate is 23.976 fps. The reason your seeing 29.97 fps is due to the pulldown flags in the MPEG. Most DVD's are encoded using FILM. These flags tell your dvd player to Telecine the material (convert it back to 29.97 frames per second). It does this on the fly during playback.

When your using DVD2AVI, using the 'Forc Film' option, removes the pulldown flags, leaving a true progressive (non interlaced) source at 23.97. When your encoding later, the encoder can either add those flags back (using 3:2 Pulldown in TMPGenc), or you can use PULLDOWN.EXE to add them back. Does anyone know how much of a performance hit the Pulldown option in TMPGenc causes?

[Treebeard]

Using the 3:2 pulldown in TMPGenc does not cause significant increase in the encoding time. Works great.