24p in DVD Studio Pro 4? Why is it showing assets as 29.97? at DVinfo.net

Nick Weeks · April 21st, 2008, 10:00 PM

This has racked my brain for hours, but I can't seem to come to any sort of conclusion. I really need some insight on it...

To start, I capture from the Canon HV20 at 23.98 fps (the video was shot on an A1), using the 1080p24 setting on my sequence (also set to 23.98 fps). So I export the sequence as a quicktime movie... everything is good. I can open that quicktime movie in quicktime, view properties and it correctly shows 23.98 fps (attachment 24p04.jpg)

So, I drag my video into compressor, making sure the mpeg2 option is 23.98 fps, also note the source video is showing 23.98 fps. (attachment 24p06.jpg)

I let the file compress.... everything is still great... so I open the m2v file in quicktime and check the frame rate, now it's 29.97?? why is that? Also, I import the same m2v into dvd studio pro and it also shows 29.97. What gives? (attachments 24p07.jpg and 24p03.jpg)

I also opened the video in VLC, which also shows 29.97. (attachment 24p09.jpg)

So as a last resort I tried MPEG Streamclip... it shows 23.98! (attachment 24p10.jpg) Obviously 23.98 is getting encoded in the file somewhere, but why is quicktime and even DVD studio pro simply ignoring the option? In the DVD Studio Manual, on page 49 it clearly states "You can confirm they are actually 24 fps by selecting them in the Assets tab and verifying the frame rate in the Asset inspector". Well, the Asset inspector shows 29.97!

Is my DVD even capable of playing back a 24fps without the pulldown?

I tried answering that myself by going ahead and burning the DVD. Once it finished, I opened the VOB files with the exact same results. VLC shows 29.97 and MPEG Streamclip showed 23.98.

Any ideas??? I'm completely lost on this one

Jimmy Moss · April 22nd, 2008, 01:22 AM

I was going to answer but then I realized I don't know for sure. You could just read this:

http://www.kenstone.net/fcp_homepage..._nattress.html

Scroll down about 2/3rds to 3/4ths down the page and read under 24p Delivery. I think it will help.

Nick Weeks · April 22nd, 2008, 05:56 AM

Jimmy,

Thanks for the response. It's funny you sent that article, it's actually the main reason I tried this for myself, only to see my results also contradict that article! In the article, under 24p Delivery, it says ".....most importantly for us, compressing 23.98fps media will result in a 23.98fp MPEG2 file for importing into DVD Studio Pro."

According to Quicktime and DVD Studio Pro the MPEG2 file I created from FCP using Compressor is 29.97, only MPEG Streamclip properly shows 23.98. Why is MPEG Streamclip the only software that shows the frame rate as it should be?

Aric Mannion · April 22nd, 2008, 02:37 PM

This maybe a stupid question, but can dvd studio pro make a progressive dvd? I thought SD DVD had to be interlaced. So if you can make a 24p dvd, that's news to me.

Nick Weeks · April 22nd, 2008, 03:20 PM

MPEG2 is supposed to be able to support 23.98 or 29.97, and either interlaced or progressive.

As long as your player supports "progressive scan" it should playback without any trouble at all.

I have encoded, burned, and played back numerous DVDs from progressive 23.98 media, but this is the first time I actually paid attention to the frame rates.

Aric Mannion · April 23rd, 2008, 08:58 AM

I read today that DVD studio pro will tell you the footage is 29.97 even if it's 24p. Quicktime should tell you the correct frame rate though, so I'm not sure why it's not.

Nick Weeks · April 23rd, 2008, 05:48 PM

Quote:

Originally Posted by Aric Mannion

I read today that DVD studio pro will tell you the footage is 29.97 even if it's 24p.

Would you mind sharing where you read that information?

April 21st, 2008, 10:00 PM	#1
Nick Weeks Major Player Join Date: Jan 2006 Location: Birmingham, AL USA Posts: 722	24p in DVD Studio Pro 4? Why is it showing assets as 29.97? This has racked my brain for hours, but I can't seem to come to any sort of conclusion. I really need some insight on it... To start, I capture from the Canon HV20 at 23.98 fps (the video was shot on an A1), using the 1080p24 setting on my sequence (also set to 23.98 fps). So I export the sequence as a quicktime movie... everything is good. I can open that quicktime movie in quicktime, view properties and it correctly shows 23.98 fps (attachment 24p04.jpg) So, I drag my video into compressor, making sure the mpeg2 option is 23.98 fps, also note the source video is showing 23.98 fps. (attachment 24p06.jpg) I let the file compress.... everything is still great... so I open the m2v file in quicktime and check the frame rate, now it's 29.97?? why is that? Also, I import the same m2v into dvd studio pro and it also shows 29.97. What gives? (attachments 24p07.jpg and 24p03.jpg) I also opened the video in VLC, which also shows 29.97. (attachment 24p09.jpg) So as a last resort I tried MPEG Streamclip... it shows 23.98! (attachment 24p10.jpg) Obviously 23.98 is getting encoded in the file somewhere, but why is quicktime and even DVD studio pro simply ignoring the option? In the DVD Studio Manual, on page 49 it clearly states "You can confirm they are actually 24 fps by selecting them in the Assets tab and verifying the frame rate in the Asset inspector". Well, the Asset inspector shows 29.97! Is my DVD even capable of playing back a 24fps without the pulldown? I tried answering that myself by going ahead and burning the DVD. Once it finished, I opened the VOB files with the exact same results. VLC shows 29.97 and MPEG Streamclip showed 23.98. Any ideas??? I'm completely lost on this one Attached Thumbnails

April 22nd, 2008, 01:22 AM	#2
Jimmy Moss Regular Crew Join Date: Nov 2007 Location: Nashville TN Posts: 48	I was going to answer but then I realized I don't know for sure. You could just read this: http://www.kenstone.net/fcp_homepage..._nattress.html Scroll down about 2/3rds to 3/4ths down the page and read under 24p Delivery. I think it will help.

April 22nd, 2008, 05:56 AM	#3
Nick Weeks Major Player Join Date: Jan 2006 Location: Birmingham, AL USA Posts: 722	Jimmy, Thanks for the response. It's funny you sent that article, it's actually the main reason I tried this for myself, only to see my results also contradict that article! In the article, under 24p Delivery, it says ".....most importantly for us, compressing 23.98fps media will result in a 23.98fp MPEG2 file for importing into DVD Studio Pro." According to Quicktime and DVD Studio Pro the MPEG2 file I created from FCP using Compressor is 29.97, only MPEG Streamclip properly shows 23.98. Why is MPEG Streamclip the only software that shows the frame rate as it should be?

April 22nd, 2008, 02:37 PM	#4
Aric Mannion Major Player Join Date: Apr 2006 Location: Boston, Massachusetts Posts: 616	This maybe a stupid question, but can dvd studio pro make a progressive dvd? I thought SD DVD had to be interlaced. So if you can make a 24p dvd, that's news to me.

April 22nd, 2008, 03:20 PM	#5
Nick Weeks Major Player Join Date: Jan 2006 Location: Birmingham, AL USA Posts: 722	MPEG2 is supposed to be able to support 23.98 or 29.97, and either interlaced or progressive. As long as your player supports "progressive scan" it should playback without any trouble at all. I have encoded, burned, and played back numerous DVDs from progressive 23.98 media, but this is the first time I actually paid attention to the frame rates.

April 23rd, 2008, 08:58 AM	#6
Aric Mannion Major Player Join Date: Apr 2006 Location: Boston, Massachusetts Posts: 616	I read today that DVD studio pro will tell you the footage is 29.97 even if it's 24p. Quicktime should tell you the correct frame rate though, so I'm not sure why it's not.