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Old January 29th, 2012, 06:21 AM   #1
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Question regarding best output for bluray from 1080 25p

While struggling to figure out which forum to post this in it occured to me to ask the experts in shoot to dvd and bluraybproduction - the wedding pros.

I have a project I shot on an EX1 as 1080 25p. I'm editing in finalcut pro and using pro res 422 on the sequence. I burned a bluray direct fron the program using the share - burn bluray and it kinda looked, well pretty rubbish. The movements were funny and overall there was something wrong with the quality.

I exported a quicktime h264 to test on a pc and it looked much better. Does anyone have any tips for how to get the best quality bluray in 25p out of final cut?
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Old January 29th, 2012, 11:12 AM   #2
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Re: Question regarding best output for bluray from 1080 25p

You can't burn 1080/25p to Blu Ray. 1080/24p, otherwise 720/50p. All to do with being designed for the "NTSC" market while ignoring the far larger "PAL" one.

Ron
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Old January 29th, 2012, 08:55 PM   #3
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Re: Question regarding best output for bluray from 1080 25p

Quote:
Originally Posted by Damian Heffernan View Post
While struggling to figure out which forum to post this in it occured to me to ask the experts in shoot to dvd and bluraybproduction - the wedding pros.

I have a project I shot on an EX1 as 1080 25p. I'm editing in finalcut pro and using pro res 422 on the sequence. I burned a bluray direct fron the program using the share - burn bluray and it kinda looked, well pretty rubbish. The movements were funny and overall there was something wrong with the quality.

I exported a quicktime h264 to test on a pc and it looked much better. Does anyone have any tips for how to get the best quality bluray in 25p out of final cut?
Since 1808p25 is not officially supported it is a bit of a trick to make a good 25p blu-ray disk. The general idea is to encode as 25p progressive and set some interlace flags to make the bitstream blu-ray compliant. With x264 the option is --fake-interlaced. Some additional information in the context of 30p blu-ray disks may be found at

Blu-Ray compliant AVC files..
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Old January 30th, 2012, 01:37 AM   #4
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Re: Question regarding best output for bluray from 1080 25p

unbelieveable. If I had of known that I would have shot 24p.

Thanks for the link I'll have a read.
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Old January 30th, 2012, 12:39 PM   #5
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Re: Question regarding best output for bluray from 1080 25p

Using Cinema Tools to conform to 24p may be your only option. Fortunately Cinema Tools does a pretty good job.
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Old January 30th, 2012, 02:07 PM   #6
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Re: Question regarding best output for bluray from 1080 25p

Tim I transcode my 25P master to 50i & it looks great, it's a sort of fake 50i. It could be that you transcoded to 24P and thus the weird motion.
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Old January 30th, 2012, 03:00 PM   #7
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Re: Question regarding best output for bluray from 1080 25p

seems a shame to "waste" the p by transcoding to i.
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Old January 31st, 2012, 03:26 AM   #8
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Re: Question regarding best output for bluray from 1080 25p

My understanding is that all you need do is create a 108050i disc & that the Blu-ray player then does the right thing. It's effectively 25p inside a 50i wrapper like 25psf when we record on certain cameras. It looks correct on screen when I create the disc with Encore anyway.
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Old January 31st, 2012, 05:36 AM   #9
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Re: Question regarding best output for bluray from 1080 25p

So Nigel, I have some 25p stuff in FCP X (yes, I know!) in Apple Pro Res 4:2:2. I also have "Toast Titanium".

What do I need to do to "create" what I assume to be a phony 50i movie to encode to Blu-Ray as effectively 25p?


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Old January 31st, 2012, 11:17 AM   #10
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Re: Question regarding best output for bluray from 1080 25p

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Originally Posted by Ronald Jackson View Post
So Nigel, I have some 25p stuff in FCP X (yes, I know!) in Apple Pro Res 4:2:2. I also have "Toast Titanium".

What do I need to do to "create" what I assume to be a phony 50i movie to encode to Blu-Ray as effectively 25p?


Ron
Sorry, I don't know. I am using Adobe Encore & I just add the 25p files from Adobe Premiere & tell it to create a 50i Blu-ray.
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Old January 31st, 2012, 11:03 PM   #11
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Re: Question regarding best output for bluray from 1080 25p

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Tim I transcode my 25P master to 50i & it looks great, it's a sort of fake 50i. It could be that you transcoded to 24P and thus the weird motion.
No, I've never had the problem. I was just suggesting 25P to 24P with Cinema Tools. The conformation is done all the time with PAL video to film. The poor quality of 25P in whatever software the OP was using to burn would be a result of bad conformation. Cinema Tools would do a much better job.
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Old February 1st, 2012, 03:21 AM   #12
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Re: Question regarding best output for bluray from 1080 25p

Conforming from 25p to 24p with Cinema Tools is effectively what they do with all Hollywood films on PAL DVD. The 4% slowdown is small enough that nobody ever notices but does account for different running times that will be observed with NTSC & PAL DVDs. All Cinema Tools does is flip some bits in the file header to set the frame rate at 24p rather than 25p & is more or less instant. There is no transcoding.
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Old February 1st, 2012, 04:32 AM   #13
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Re: Question regarding best output for bluray from 1080 25p

No Cinema Tools in FCP X.

Ron
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Old February 1st, 2012, 09:45 AM   #14
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Re: Question regarding best output for bluray from 1080 25p

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No Cinema Tools in FCP X.

Ron
I believe that Conform Speed in the Speed Menu can do the same in FCP X.
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