1280x720p to put on Blu-ray at DVinfo.net

George Palmier · January 28th, 2011, 02:00 PM

My footage is 1280x720 25p. The format is HDV in a .m2t file. To what format should I render from Vegas Pro 8 in order to have a compliant Blu-ray disc?

Brian Luce · January 28th, 2011, 02:39 PM

There should be render presets in the render window. Did you check? Look in mpeg2.

George Palmier · January 29th, 2011, 05:02 AM

My problem is which preset to choose. There is one which is "HDV 720-25p". This will produce a .m2t file which I don't think is Blu-ray compliant. In the blu-ray preset list there is no 720-25p. Should I use 1440x1080 50i? Would this produce a lesser quality image since it is at a higher resolution then my original 1280x720 25p?

Randall Leong · January 29th, 2011, 10:18 AM

For 1280x720, you will need to convert 25p to 50p for Blu-ray compliance. The official Blu-ray Disc specification does not support 25p or 30p at any resolution. Some studios have managed to successfully convert 25p to 24p - but that would have required specialized equipment to do the job correctly.

Adam Stanislav · January 29th, 2011, 12:24 PM

Quote:

Originally Posted by Randall Leong

Some studios have managed to successfully convert 25p to 24p - but that would have required specialized equipment to do the job correctly.

Specialized equipment? In most cases you would just declare the video to be 24p (so an hour's worth of video will play in an hour plus two and a half minutes, a difference no one will ever notice) and resample the audio to match.

I mean, didn't the PAL DVDs just speed up film by 4% (much to the annoyance of sound people)? This would just do the same but in the opposite direction.

Here is the math behind it: One hour (60 minutes) of 25p played at 24p will take 60 * 25 / 24 = 62.5 minutes to play.

George Palmier · January 29th, 2011, 11:42 PM

Randall I totaly agree with you that 25p is not blu-ray compliant. And in fact that is my problem!! Can anyone please tell me which preset to use in Vegas Pro 8 to convert my 1280x720 25p in order to put the video on Blu-ray?

January 28th, 2011, 02:00 PM	#1
George Palmier Regular Crew Join Date: Mar 2006 Location: Malta Posts: 96	1280x720p to put on Blu-ray My footage is 1280x720 25p. The format is HDV in a .m2t file. To what format should I render from Vegas Pro 8 in order to have a compliant Blu-ray disc?

January 28th, 2011, 02:39 PM	#2
Brian Luce Inner Circle Join Date: Jan 2006 Posts: 2,290	There should be render presets in the render window. Did you check? Look in mpeg2.

January 29th, 2011, 05:02 AM	#3
George Palmier Regular Crew Join Date: Mar 2006 Location: Malta Posts: 96	My problem is which preset to choose. There is one which is "HDV 720-25p". This will produce a .m2t file which I don't think is Blu-ray compliant. In the blu-ray preset list there is no 720-25p. Should I use 1440x1080 50i? Would this produce a lesser quality image since it is at a higher resolution then my original 1280x720 25p?

January 29th, 2011, 10:18 AM	#4
Randall Leong Major Player Join Date: Nov 2009 Location: Melrose Park, Illinois, USA Posts: 936	For 1280x720, you will need to convert 25p to 50p for Blu-ray compliance. The official Blu-ray Disc specification does not support 25p or 30p at any resolution. Some studios have managed to successfully convert 25p to 24p - but that would have required specialized equipment to do the job correctly.

January 29th, 2011, 11:42 PM	#6
George Palmier Regular Crew Join Date: Mar 2006 Location: Malta Posts: 96	Randall I totaly agree with you that 25p is not blu-ray compliant. And in fact that is my problem!! Can anyone please tell me which preset to use in Vegas Pro 8 to convert my 1280x720 25p in order to put the video on Blu-ray?