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16:9 Digi Beta_ very basic doubt

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prathyush kumar
16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 7:41:03 am

Hi Everyone,

As the whole world is moving towards HD, 6K to 8K, our TV stations are still stuck in SD, just to give us sometime nightmares. I haven't made a digit beta for last seven years, but now i have to make one. So just want to cross check my understandings are correct.

What i have

Apple Pro Res 422 HQ .Mov File.

25 FPS

1920*1080

What my TV Station want

16:9 SD Digi Beta


I am using FCP 7.03, i figured out two ways to doing it, i haven't find any distortion in my image though, but still want to confirm.

Method 01

Make a timeline in FCP

720*576(5:4) Anamorphic turned on,
codec to Uncompressed 8/10 bit.
Drag and Drop my HD file and say NO to Change my sequence setting and change

Method 02

Convert 1920*1080 video to 1024*576 and open in FCP 7

720*576(5:4) Anamorphic turned on,
codec to Uncompressed 8/10 bit.


then edit to tape.


Result

A 16:9 FHA SD Digi Beta

In second method i found more luminance in image and less pixeling in text and graphics don't know why, so i thought of following the second method.

Could you guys please suggest is everything correct or am i missing anything.

Thank you
prathyush


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Rainer Wirth
Re: 16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 1:23:22 pm

Best results are:

First:
Digibeta to Pro Res 422 (No HQ no LT)
From the Pro Res file to SD matching the TV specs.

Second:
Keep the workflow with SD in a 50MBs codec with 4.2.2 color space from start to finish.

I would choose second. Digi beta is shot with 10bit 4.2.2 codec. So any codec meeting these specs is fine.
The less you transcode, the better the result in the end.

cheers

Rainer

factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems


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prathyush kumar
Re: 16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 1:44:04 pm

Hi Rainer,

Thanks for the reply.

So you suggest to convert the original pro res files to Uncompressed 10 bit 422 directly with a dimension of 1024*576 and bring to fcp timeline with Anamorphic turned on, then edit to tape?

prathyush


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Rainer Wirth
Re: 16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 7:58:29 pm

No,

version one is 1920x1080 either p or i, the way the TV station wants,
or 720x576 anamorphic SD.
I would not choose 720p.

cheers

Rainer

factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems


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Rainer Wirth
Re: 16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 8:02:40 pm

Edit to tape will be SD (720x576 anarmophic).
The digibeta is just 720x576.
Stick to the SD workflow (version2 10bit 422) all the time.
cheers

Rainer

factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems


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Michael Gissing
Re: 16:9 Digi Beta_ very basic doubt
on Mar 15, 2015 at 11:51:37 pm

What I/O card are you using to go to the digi beta? If Kona then you can edit to tape from your original HD timeline and set the Kona to do a downconvert to SD PAL. It will interlace as well as resize.

The resolution will be better than any transcoding or resizing in FCP. FCP is poor at rescaling. If you have to make a SD file then use Compressor to make a 720 x 576 anamorphic Uncompressed 10 bit. Set frame controls on in Compressor and best for resize filter.

Put that in a FCP timeline that matches and output to tape. Use one step to go from HD to correct aspect SD (720 x 576).


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prathyush kumar
Re: 16:9 Digi Beta_ very basic doubt
on Mar 16, 2015 at 5:12:55 am

Hi Everyone,

Thanks for the feedbacks. So right now i am converting my files in Quick time or Mpeg Stream and choose Uncompressed 10 bit 422, set as lower filed, then choosing the dimension to 720*576 16:9 aspect ratio, bring to FCP and drop in a 720*576 anamorphic timeline, make digi beta.

So thats all or still i am missing something?


Thank you
prathyush

*My Card is Black Magic i cant see much option there, i think it may be a very basic one.


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Michael Gissing
Re: 16:9 Digi Beta_ very basic doubt
on Mar 16, 2015 at 11:52:41 pm

PAL is upper field. Do not set to lower. Use Compressor not MPEG Streamclip


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prathyush kumar
Re: 16:9 Digi Beta_ very basic doubt
on Mar 17, 2015 at 5:18:32 am

Hi Micahel,

Thanks for the input.

Compressor takes a lot of time but i agree it gives you quality.

Now this is where i am confused. when i set 720*576 16:9, i can see in brackets the resolution is 1024*576. So is it actually 1024*576 or 720*576. I converted in both ways setting everything same except its dimension and the result, quality is same.

Why then we have to set to 720*576 when we can do the same with 1024*576 where at least more number of lines are there which means more information right?


http://f1.creativecow.net/file/8663/8663_sasa.tiff.zip


Please have a look at the image attached


May be i am talking stupidity but just i am curious.

Thank you
Prathyush


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Trevor Asquerthian
Re: 16:9 Digi Beta_ very basic doubt
on Mar 17, 2015 at 2:38:08 pm

http://en.wikipedia.org/wiki/Pixel_aspect_ratio



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prathyush kumar
Re: 16:9 Digi Beta_ very basic doubt
on Mar 18, 2015 at 5:46:39 am

Hi Trevor,

I got the point Trevor, but what i am confused now is when i am bringing a 720*576 16:9 to an anamorphic sequence in FCP i am getting a small black pillar on both sides of screen.

But when it is 1024*576 16:9 the image appears full screen.

I made a digital cut of both on separate tapes and result was same.

Why this black space is there. I am clueless.

Than you

prathyush.


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Rainer Wirth
Re: 16:9 Digi Beta_ very basic doubt
on Mar 18, 2015 at 12:00:56 pm

you have to set the 720x576 to anamorphic and then throw it on the anarmorphic SD sequence.
Voila - it shows you 16x9 without a black bar. Its a click in the media bin if you scroll right.

cheers

Rainer

factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems


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Rainer Wirth
Re: 16:9 Digi Beta_ very basic doubt
on Mar 18, 2015 at 12:02:18 pm

Michael has told you the exact workflow,

cheers

Rainer

factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems


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prathyush kumar
Re: 16:9 Digi Beta_ very basic doubt
on Mar 18, 2015 at 12:35:20 pm

Hi Everyone,


Thanks a lot.

Take care
prathyush


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