At what point do you notice lost quality when lowering bitrate? - Page 2 at DVinfo.net

Go Back   DV Info Net > Windows / PC Post Production Solutions > What Happens in Vegas...

What Happens in Vegas...
...stays in Vegas! This PC-based editing app is a safe bet with these tips.


Reply
 
Thread Tools Search this Thread
Old December 23rd, 2009, 05:52 PM   #16
Inner Circle
 
Join Date: Jan 2006
Location: Minnesota (USA)
Posts: 2,171
...and if the 135 minute version is a bit weak (image quality wise, due to compression), definitely apply visually lossless denoising before altering the editing, if changing the transitions would weaken the presentation at all.
Robert M Wright is offline   Reply With Quote
Old December 23rd, 2009, 08:18 PM   #17
Inner Circle
 
Join Date: Jun 2005
Location: Cincinnati, OH
Posts: 8,421
Actually, it looks great. Since I reduced the auto gain on my camera, even dark footage looks relatively crisp, it's amazing...I'm liking my FX1000 more and more.
Jeff Harper is offline   Reply With Quote
Old December 24th, 2009, 08:04 AM   #18
Slash Rules!
 
Join Date: Apr 2002
Location: Houston, Texas
Posts: 4,723
Can't VBR encoding cause problems for DVD players? A while ago, I used to have problems with several of my short films on DVD in many different players where the movie would stop, stutter, etc., but only in spots where it went from black to something else quickly, like a fade up of credits, fade up of picture, cutting to black and then cutting to picture, etc.

I bought new discs from Taiyo Yuden, tried all kinds of crap. Finally, someone on this board mentioned trying a constrained bit rate. BINGO! Haven't had this problem since.

That's my cautionary tale.
Josh Bass is offline   Reply With Quote
Old December 24th, 2009, 11:44 AM   #19
Inner Circle
 
Join Date: Jan 2006
Location: Minnesota (USA)
Posts: 2,171
Most likely the encoding settings were not within DVD video specs, or were pushing the edge of the specs (as mentioned above). Certainly, cap the peak video bitrate at 8000Kbps if you are having playback problems at all.

What encoder were you using?
Robert M Wright is offline   Reply With Quote
Old December 24th, 2009, 01:29 PM   #20
Major Player
 
Join Date: Sep 2008
Location: East Bay Cali
Posts: 563
Quote:
Originally Posted by Josh Bass View Post
Can't VBR encoding cause problems for DVD players?.
Some Cheaper DVD players cant keep up with the data rate when it hits the high data rates, i purposfully have cheap dvd players to check , and exactally like Robert M Wright said, if you keep the max under 8000 most of them will handle it.
when i go over 8000 for a SHORT dvd i always supply a "compatability" track on the same dvd. and after testing we put the compatability track at First, they have to go to the second page to get the high data track.
__________________
----------------sig-----------------
Re-learning everything all over again, one more time.
Marty Welk is offline   Reply With Quote
Old December 24th, 2009, 03:28 PM   #21
Slash Rules!
 
Join Date: Apr 2002
Location: Houston, Texas
Posts: 4,723
Oh, geez, no idea. It was so long ago. I've been doing a CBR at 7K or below from that point on, though.

Yes, I had heard it was the reader/laser/DVD fairy having to go from reading black to reading full moving pixel changing craziness instantly that would "crash" it. It happened A LOT. I'm struggling to remember if there was ever a player I tried those discs on where it didn't happen.
Josh Bass is offline   Reply With Quote
Old December 24th, 2009, 05:14 PM   #22
Inner Circle
 
Join Date: Jan 2006
Location: Minnesota (USA)
Posts: 2,171
Did it crash with more than one player?
Robert M Wright is offline   Reply With Quote
Old December 24th, 2009, 05:41 PM   #23
Slash Rules!
 
Join Date: Apr 2002
Location: Houston, Texas
Posts: 4,723
I think it only DIDN'T crash in one player. Almost every time I played those anywhere they had problems.
Josh Bass is offline   Reply With Quote
Old December 24th, 2009, 05:59 PM   #24
Inner Circle
 
Join Date: Jan 2006
Location: Minnesota (USA)
Posts: 2,171
My only guess is that you were probably using what I think of as an ultra-consumerish junk video editing package, like Pinnacle Studio, CyberLink PowerProducer, etc. I can well imagine one of those apps generating improper VBR encodings, at default settings no less, for DVD video - just wouldn't surprise me a bit.
Robert M Wright is offline   Reply With Quote
Old January 9th, 2010, 08:19 AM   #25
Major Player
 
Join Date: May 2004
Location: hungary
Posts: 462
hi guys,
i also make my wedding videos in CBR (maximum 6600kbps, 1.5 hour / disc)
i also hear that with VBR encoding fade in from black may be problematic, and may
have more compression artifact than with CBR. But honestly i didn't make a test.
So far every of my weddings fitted on two disc (2x1.5 hour)
But i like MPEG smart rendering in Vegas8, sometimes i need another edit, but i have only the rendered mpeg file. I ask, if i use VBR encoding, smart rendering will be still available, and work correctly? What is important? The min. average and max bitrate will be the same as in the original mpeg, or the whole thing work only with CBR?

thx
__________________
Relaxing clips with waterfalls and music, 3D photos, 3D videos:
www.3d-video.hu
Prech Marton is offline   Reply With Quote
Old January 9th, 2010, 12:31 PM   #26
Old Boot
 
Join Date: Aug 2002
Location: London UK
Posts: 3,528
What would be really cute would be to have some form of utility that would map out the noise in some 2 hour linear graph. This would then narrow one's attention/focus on the noisier sections.

Noise is painful for MPEG encoders. Actually not for the encoders, but for the playback device having to deal with it. Definitely reduce gain in camera; use a small bit of smoothing on nosier stuff; coventrate on dissolves that MAY have real movement within and unless needed, keep under 7mbs. If you CAN get away with 8mbs, great.

Grazie
Graham Bernard is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Windows / PC Post Production Solutions > What Happens in Vegas...

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 12:17 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network