MPEG-2 Encoding acceleration? at DVinfo.net

Go Back   DV Info Net > Apple / Mac Post Production Solutions > Final Cut Suite

Final Cut Suite
Discussing the editing of all formats with FCS, FCP, FCE


Reply
 
Thread Tools Search this Thread
Old December 20th, 2005, 08:42 AM   #1
New Boot
 
Join Date: Dec 2005
Posts: 20
MPEG-2 Encoding acceleration?

Are there any products that work hand-in-hand with FCP or Compressor to speed up the encoding process to MPEG-2? I want good looking video, but its a bit insane to wait 20+ hours to compress ~30 minutes of video in two pass vbr best mode.

I've read the new ATI X1800 cards have a built in encoding accelerator, but I do not know if they work w/ the Mac, nor if they even have drivers if they would.

Thanks!

P.S. I use a G5 PM /w PCI-X.
Michael Rich is offline   Reply With Quote
Old January 21st, 2006, 10:58 PM   #2
Major Player
 
Join Date: Mar 2005
Location: Maryland, USA
Posts: 696
MPEG 2 Encoding

I have been fighting this as well. I have heard that it is better to use the single pass encoder instead of the 2 pass and that the quality is just as good but is much faster.

I have been having problems with the footage looking jittery if there is any kind of motion. I understand that there was a Pro Application update that was supposed to fix the problem but I have installed it and the files still look bad.

Even using the single pass encoder, a 2.5 minute clip took over 1 hour to encode.

Let me know if you find anything out.

Dan Weber
Daniel Weber is offline   Reply With Quote
Old January 22nd, 2006, 09:35 AM   #3
Major Player
 
Join Date: Apr 2005
Location: Atlanta, GA
Posts: 212
Images: 8
Here is my workflow:

Edit in FCP5
Change timeline settings to Field D=None
Apply Deinterlace filter to the timeline
Export to compressor
Constant Bit Rate = 8.3MBPS

Leave the frame controls alone!

(If you deinterlace the video, make sure compressor is set to progressive)
Tomas Chinchilla is offline   Reply With Quote
Old January 29th, 2006, 01:30 PM   #4
Trustee
 
Join Date: Mar 2004
Location: Carlsbad CA
Posts: 1,132
you guys are talking about limiting your mpeg2 encoding capabilities to cbr and single-pass only... that's not the way to create the best quality output, it's a giant step backwards... you might as well just feed the raw avi out thru firewire to a dvd recorder, then rip the disk back into your dvd authoring program... you'd probably get better picture quality.

surely there must be better solutions on the mac side of the fence... how about sorenson squeeze pro?
Dan Euritt is offline   Reply With Quote
Old January 30th, 2006, 08:21 AM   #5
Regular Crew
 
Join Date: Jan 2005
Location: Belgium
Posts: 139
Bitvise gets good reports and MegaPEG too, but Compressor is not so bad at all. Considering your comment on CBR and single pass: 2 pass and VBR encoding only makes sense if you're short on disc space. Otherwise you're just trying to compress more than CBR.
__________________
Please keep in mind that English is not my native language.
Ben De Rydt is offline   Reply With Quote
Old January 30th, 2006, 10:30 AM   #6
Trustee
 
Join Date: Feb 2004
Location: Brookline, MA
Posts: 1,447
You're both right; VBR yields better quality for a given bit rate, and CBR takes less time.
Emre Safak is offline   Reply With Quote
Old January 30th, 2006, 04:33 PM   #7
Guest
 
Posts: n/a
Get a PC and run procoder..

http://www.canopus.com/products/ProCoderSW/index.php
  Reply With Quote
Old January 30th, 2006, 11:10 PM   #8
Inner Circle
 
Join Date: Dec 2005
Location: New York City
Posts: 2,615
Better yet skip Compressor and use QuickTime Export in FCP. You can only do one file at a time but it creates MPEG2 files faster and as good quality as Compressor. I have timed this out and found that my G4 Dual 1GHZ compressing MPEG2 with QuickTime Export beat my G5 Dual 2GHZ running Compressor at the same setting with the same video files. My G5 is really fast with QuickTime Export. Test it yourself.

Video cards, to my knowledge, don't provide MPEG2 acceleration.

Compressor, by the way, is faster making H264 files for the internet than QuickTime Export.

And my observations:

High rate CBR is fine for short files.
One-Pass VBR is good for longer files.
Two-Pass VBR provides minor improvements for high bit rate file, better results for lower bit rate files (6bps and lower).
__________________
William Hohauser - New York City
Edit/Camera/DCP production/Animation
William Hohauser is offline   Reply With Quote
Old January 31st, 2006, 06:16 AM   #9
Regular Crew
 
Join Date: Jan 2005
Location: Belgium
Posts: 139
Quote:
Originally Posted by Emre Safak
You're both right; VBR yields better quality for a given bit rate, and CBR takes less time.
I don't mean to start a flameware here, but please tell me how VBR can yield better quality, provided the encoders VBR upper bitrate limit is the same as the bitrate used for CBR encoding.
__________________
Please keep in mind that English is not my native language.
Ben De Rydt is offline   Reply With Quote
Old January 31st, 2006, 12:44 PM   #10
Trustee
 
Join Date: Feb 2004
Location: Brookline, MA
Posts: 1,447
It won't under those conditions, of course. The maximum bit rate for the VBR would have to be higher than that of the CBR. The point of VBR is to use your space efficiently.
Emre Safak is offline   Reply With Quote
Old January 31st, 2006, 12:48 PM   #11
Major Player
 
Join Date: Apr 2005
Location: Atlanta, GA
Posts: 212
Images: 8
Quote:
Originally Posted by Ben De Rydt
I don't mean to start a flameware here, but please tell me how VBR can yield better quality, provided the encoders VBR upper bitrate limit is the same as the bitrate used for CBR encoding.

I was thinking the same but didn't want to start an argument about it either.

I have used both and I can definetly get and see better results with CBR in compressor.
Tomas Chinchilla 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 > Apple / Mac Post Production Solutions > Final Cut Suite

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 05:02 AM.


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