framerate conversion

[vbguru_12000]

What's the quickest way to convert a .vob file with a fps of 23.98 to 29.97? I was going to use TMPGEnc but it doesn't support .vob files.

[bugster]

What's the quickest way to convert a .vob file with a fps of 23.98 to 29.97? I was going to use TMPGEnc but it doesn't support .vob files.

You don't need to. If it is a .vob, it is DVD compliant, so it will be 23.97fps with 3:2 pulldown. This means it will be played back at 29.97fps by repeating certain fields. This is common and is the way film (24fps) is played on NTSC.

[vbguru_12000]

DVD-Lab won't let me even add it to the assets though. I says it has the wrong fps.

[bugster]

Use TmpGenc, mpeg tools. Demux it to .m2v and audio (.ac3 probably) add them seperatley to DVD Lab. If it will not accept the .m2v (with the same error), you can add pulldown to it (the .m2v) with pulldown.exe. I think there is also a GUI for it if you are not familiar with commandline apps.

[vbguru_12000]

Ok, it let's me add the .m2v file, however, it won't let me add the ac3 file. It says it doesn't start with the correct ac3 header. It then asks if I want to let DVD-Lab try and fix it, so I say yes. It then says it was fixed but so many bytes were removed. Then it comes up and says it's the wrong frequency and can't be added. Any ideas what I did wrong?

[BJ_M]

it has to be 48khz sample rate , not 44.1

[vbguru_12000]

How do I do that?

[vbguru_12000]

Nm, got it, I'll let you know if the DVD comes out ok. thanks for all your help.

[bugster]

Where did you get a .vob file, with ac3 audio at 44.1khz?
I have never seen such a thing

[vbguru_12000]

Use TmpGenc, mpeg tools. Demux it to .m2v and audio (.ac3 probably) add them seperatley to DVD Lab. If it will not accept the .m2v (with the same error), you can add pulldown to it (the .m2v) with pulldown.exe. I think there is also a GUI for it if you are not familiar with commandline apps.

When I do this, the audio and video are out of sync, and get worse and worse as the video progresses. It's as if the audio is going to slow, that, or the video is going to fast.

[bugster]

And have you resampled the audio to 48khz. If so, how did you do it/what tools and settings. Is the original audio, when de-muxed, the same length as the video or is it just the resampled audio that is the incorrect length?

[vbguru_12000]

I was originally using Simple De-multiplex which was outputting a 44kHz file. I then used the De-multiplex which outputed 48.

When I go to play the two files, the video is shown to have a length of 13 mins, and the audio a length of 42 min. 42 mins is the actual length of the .vob file. Also, if I let the video run, it will play all the way through.

[bugster]

When I go to play the two files, the video is shown to have a length of 13 mins, and the audio a length of 42 min. 42 mins is the actual length of the .vob file. Also, if I let the video run, it will play all the way through.

That sound like the vob may be corrupted/invalid in some way around the 13 minute mark. Being able to play it is no guarantee that it is completley correct as players tend to skip over/ignore quite a lot of errors.

I am sure there are tools that can attept to fix this but can't think what they are at the moment , maybe re-jig. Take a look in the tools section or maybe someone else can suggest something to help.