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Alex Petrovitch
"program stream", "elementary", or MPEG 2-5.0?
on Mar 29, 2011 at 8:20:40 pm

Yo forum!

I have a 80min feature, APPLE PRO RES 422 HQ in FCP7.
I send to compressor.

To make a DVD, I've used MPEG-2 5.0 MBPS, and it looks "pretty good". The bit rate is the default 5/7.5 average/max set up.
If you have a better solution - lemme know.

To make a BLURAY, I've used the "program stream" at a 33/38 bit rate. The result was disastrous. Horribly pixelated.

So - should I use the MPEG-2 5.0 for the BLURAY which seems ridiculous? I'm guessing that since it's an elementary stream instead of program stream, that's why it's so much better, even though it's at far lower bit rate?

DUH?
Any help or suggestions would be great!

Alex


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Craig Seeman
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 29, 2011 at 9:06:23 pm

In the settings you must change Stream Usage to Blu-Ray
Under Quality Average bit rate can be set from 10Mbps to 40Mbps but may default to 18Mbps
If you set Mode to any VBR setting (Two pass VBR Best for example) you can set a Maximum Bit Rate as well.



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Jeff Greenberg
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 2:06:36 am

Alex, I'm confused:
Are you using the MPEG 2 5.0 mb/s or are you doing an MPEG2 @ 33/38 bit rate?

I'm assuming you're in compressor - have you tried the MPEG2 @ bluray setting?

Best,

Jeff G

Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
------------
You should follow me (filmgeek) on twitter. I promise to be nice.
Come See me speak at NAB!
Compressor Essentials from Lynda.com
(older but still good) Marquee, Media Composer (3.5) and Basic/Advanced Color DVDs (1.0) from Vasst.com
Contact me through my Website


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Alex Petrovitch
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 3:02:54 am

I just did the h.264 blu ray stream setting, with bit rate at 14average, 17 max, and it was "less pixelated" then when I did at 33/38...that seems weird.
do you think mpeg2 is better for blu ray than h.264?


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Jeff Greenberg
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 3:09:12 am

h.264 is harder/longer to encode - but better looking at lower data rates than mpeg-2

Best,

Jeff G

Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
------------
You should follow me (filmgeek) on twitter. I promise to be nice.
Come See me speak at NAB!
Compressor Essentials from Lynda.com
(older but still good) Marquee, Media Composer (3.5) and Basic/Advanced Color DVDs (1.0) from Vasst.com
Contact me through my Website


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Alex Petrovitch
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 4:03:15 am

you can say that again.
i did the h.264, it took 24 hours. jesus.

what do you think about MPEG-2, use a "elementary stream", 14/17 bit rate instead?
what's your favorite set up in compressor to out put a BLURAY?


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Jeff Greenberg
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 12:29:53 pm

I'd go in around 20-23 megabits. I don't have a favorite - solely because blu ray has been a bit of a black hole - while I've burnt a couple, it's been headachy enough that I've been trying to avoid when possible. (Sure, it works on your blu ray player, but theirs?)

Here's some 'general' theory. If SD looks good (MPEG2) at around 4-5 mb/s, and HD is 4-6 times denser, then around 16-24 should be the sweet spot (low data spot) for it to look good (of course, your mileage may vary, try it yourself with your own codecs, etc. Stay away from sharp objects and don't run with scissors.) h.264 is more efficient, so you should be able to generally get a better look for far less; but for both codecs, there will be some footage that requires higher data rates.

Best,

Jeff G

Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
------------
You should follow me (filmgeek) on twitter. I promise to be nice.
Come See me speak at NAB!
Compressor Essentials from Lynda.com
(older but still good) Marquee, Media Composer (3.5) and Basic/Advanced Color DVDs (1.0) from Vasst.com
Contact me through my Website


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Alex Petrovitch
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 8:10:38 pm

Wow, thanks for the info.

Then let me ask you this,
if SD is at 4-5, and then theoretically HD is 16-24,
what happens if you did 1-2 for HD? or 38-39 for HD?
What should I see on either end of the spectrum w/ bit rate? How is the picture affected? What do I look for? That will help me find a place to reach.

I did a H.264 w/ 14/17, and it looked "fine", (thought it'd look better w/ all the Blu Ray hype) below the 16-24 you said, and I'm wondering how far up I should go, but I wanted to know what happens in either extreme so I know what to look for, if I should go higher, lower, etc.

It took 24 hours to export. ugh.


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Jeff Greenberg
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 10:32:11 pm

Alex,

Depending on the material, the footage looks better or worse (no surprise there, eh?)

Best way for you to become familiar with the artifacts is to *actually compress it* Google Mosquito noise and MPEG2 artifacts.

It will look 'normal' as in FCP if you go high enough.

(no surprises here, eh?)

Best,

Jeff G

Apple Master Trainer | Avid Cert. Instructor DS/MC | Adobe Cert. Instructor
------------
You should follow me (filmgeek) on twitter. I promise to be nice.
Come See me speak at NAB!
Compressor Essentials from Lynda.com
(older but still good) Marquee, Media Composer (3.5) and Basic/Advanced Color DVDs (1.0) from Vasst.com
Contact me through my Website


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Alex Petrovitch
Re: "program stream", "elementary", or MPEG 2-5.0?
on Mar 31, 2011 at 10:42:42 pm

Got it.
So LOW bit rate = artifacts and mosquito noise
High bit rate = gorgeous picture.

So there is no negative to high bit rate??


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