Quantcast KDVD: Convert 24 to 30fps - Page 2 - digitalFAQ.com Forums [Archives]
  #21  
12-16-2005, 07:29 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by the viking
Ok.But does the the pulldown flag only work with SAP?

Cause when I playback the remuxed DVD in MPC, the video renderer
filter shows a playback rate of app.23.976 fps.
And previewing the remuxed DVD in DGIndex shows also
23.976 fps.
All that is normal. For DGIndex, this is even a feature ! This is how you can tell that your DVD is 23.976 or 29.970 (interlaced or progressive)*. Few DVD are like this, but there are some.

Remember that the flag is for displaying the stream on a interlaced only display (like a TV). PC monitors are progressive, and if tools like MPC honor the flag, and send an pulled down picutre to the screen, you will see combos !

*Note: I think taht on DGIndex if you set it to "honor pulldown flags" then you will see it as 29.970 and not 23.976. This is a new setting in the last releases.
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  #22  
12-16-2005, 11:35 AM
the viking the viking is offline
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Yep,tried with "honor pulldown flags",and
it shows 29,97 fps.So the flags are there even in demuxed state.
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  #23  
12-20-2005, 02:39 PM
Shibblet Shibblet is offline
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But when you Honor the pulldown flags with DGIndex, you are getting a source that has 2 interlaced frames.

With forced film, your source (usually) has 24 progressive frames.

So I guess on a progressive scan DVD, is the video encoded at 24(23.976)fps with Pulldown enabled in hardware?

And on a regular DVD, the video is encoded at 30(29.97)fps with pulldown encoded in the frames.

Did I get this right?
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  #24  
12-20-2005, 03:14 PM
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Quote:
Originally Posted by Shibblet
So I guess on a progressive scan DVD, is the video encoded at 24(23.976)fps with Pulldown enabled in hardware?

And on a regular DVD, the video is encoded at 30(29.97)fps with pulldown encoded in the frames.

Did I get this right?
Not at all. There is no "progressive" or "regular" DVD. All DVD issued from a cinema movie are encoded in 23.976 and pulled down during playback. Dvd issued from a TV are generallyt be 29.97o trully interlaced.
There are also "hybrid" disc that mix the two but they are rare.
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  #25  
12-20-2005, 08:22 PM
Shibblet Shibblet is offline
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So a true progressive DVD has no interlaced frames in the video at 23.976fps, but will do pulldown to 29.97fps on playback. Basically your player generates the extra interlaced frames.

But on some DVD's, the source is already interlaced the same as 3:2 pulldown. And other DVD's the source is interlaced on every frame.

Does that about cover it?
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  #26  
12-20-2005, 08:30 PM
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Quote:
Originally Posted by Shibblet
But on some DVD's, the source is already interlaced the same as 3:2 pulldown.
Actually, these are considered as very bad sources
Fortunally, they are rare.

Quote:
Does that about cover it?
Yes it is.
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  #27  
07-21-2006, 08:20 AM
WOWIEGURL WOWIEGURL is offline
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I have a dvd which shows up as 20 fps in dvd2avi and 60 fps in tmpgenc. the screen is 16:9. do I encode using the frame rate tmgpenc tells me the video is using. and after use the custom pulldown 20->29.97 fps in dgpulldown? This kvcd is for private use only.
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  #28  
07-21-2006, 08:28 AM
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Quote:
Originally Posted by WOWIEGURL
I have a dvd which shows up as 20 fps in dvd2avi
First stop using dvd2avi and go to DGIndex.
Second, you seems to have a PAL source and DVD2AVI is set to "force film". Set it to "None" (or "honnor pulldown flags" in DGIndex).

Quote:
and 60 fps in tmpgenc.
That's not possible. Tmgenc must be wrong.

Quote:
the screen is 16:9. do I encode using the frame rate tmgpenc tells me the video is using.
It's up to you to tell to the programms what is the correct fps to use, not the opposite. If you don't know the fps of your source, then forget that source.
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  #29  
06-29-2007, 09:28 PM
Redge Redge is offline
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Just wondering, after all the mucking around with the fps between the two sources, isn't the audio way out of sync now?

How can you fix that?

I have a 25 fps PAL source, i'm trying to turn into a 29.967 fps dvd, the video conversion is done and i'm happy with it, just no idea how to get the audio to sync now.

I'm guessing the answer is to just let TEMPG handle it, and instead of converting them de-muxed, let TEMPG convert the fps of both the audio and the vid and hope it all works out?

I'm kinda tired right now, and confused and new, so i honestly won't be surprised if you say this doesn't make sense, but please help?
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  #30  
06-30-2007, 01:01 PM
Boulder Boulder is offline
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The easiest way for progressive PAL to NTSC DVD transfers is to

1) encode the video at 25fps but at an NTSC resolution (i.e. n x 480)
2) use DGPulldown on the resulting video and do a 25->29.97fps pulldown
3) author using the pulldowned video and the original audio track

No sync issues and you can use the original audio. Perfectly DVD compliant and easy as 1-2-3.
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  #31  
06-30-2007, 03:05 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Boulder
No sync issues and you can use the original audio. Perfectly DVD compliant and easy as 1-2-3.
But does it really works ? I tried once, a long time ago, with DGPulldown 1.0.3 I think, and this doesn't work at all.
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  #32  
06-30-2007, 04:43 PM
Boulder Boulder is offline
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No reason for it not to work. What was the problem? The thing you need to ensure is that you use a maximum of 12 frames per GOP, I forgot to mention this.
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  #33  
07-07-2007, 12:49 AM
Redge Redge is offline
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I've tried what you suggested boulder, and works spectacularly for some conversions, not so well for others. I'm unsure how to check what the min amount of frames in all the GOPs are, though, so don't know how to find out if that's the culprit in the ones that aren't working.

Also, i'm having issues with the ones that are 23.976 fps, so I'm trying to encode it as an NTSC 720 x 480 23.976 fps, with a 3:2 pull down and hoping that the audio synchronizes with it, if you can think of anything else i might be doing wrong, would be greatly appreciated.
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  #34  
07-07-2007, 01:31 AM
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Quote:
Originally Posted by Redge
I'm unsure how to check what the min amount of frames in all the GOPs are
Boulder talk about MAX gop length, and you are controlling it as this is a setting of the encoder.
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  #35  
07-07-2007, 02:47 AM
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Quote:
Originally Posted by Redge
Also, i'm having issues with the ones that are 23.976 fps, so I'm trying to encode it as an NTSC 720 x 480 23.976 fps, with a 3:2 pull down and hoping that the audio synchronizes with it, if you can think of anything else i might be doing wrong, would be greatly appreciated.
If you are fooling around with AVIs, we cannot help you with that.
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