Quantcast Why do you Guys with PVR-250 Hardware Encoders Re-Encode? - digitalFAQ.com Forums [Archives]
  #1  
11-16-2003, 04:01 PM
audi2honda audi2honda is offline
Free Member
 
Join Date: Jun 2003
Location: Orange County, CA
Posts: 291
Thanks: 0
Thanked 0 Times in 0 Posts
doesn't that defeat the purpose of buying a hardware encoder? SHould I buy a software encoding TV tuner instead? Seems like a bad idea to encode then encode again.
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
11-16-2003, 04:18 PM
incredible incredible is offline
Free Member
 
Join Date: May 2003
Location: Germany
Posts: 3,189
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via ICQ to incredible
Quote:
Originally Posted by audi2honda
doesn't that defeat the purpose of buying a hardware encoder? SHould I buy a software encoding TV tuner instead? Seems like a bad idea to encode then encode again.


Based on that I understood you well.

1. The advantage of a hardware encode process while capture is that your CPU wont be used that much as when using a software encoding while capturing!

2. It depends on the bitrate when capturing using mpeg2... using high bitrates when capturing via PVR 250 will give you a good source to reencode to mpeg1 or mpeg2.
Just think! DVDs as used many times to reencode to KVCD ARE encoded using mpeg2 too!

3. Capturing using mpeg2 even at 10000kbit will give you a smaller stream on your HD in comparison to mjpeg captures
Reply With Quote
  #3  
11-16-2003, 09:39 PM
Dano Dano is offline
Free Member
 
Join Date: Apr 2003
Location: Brockton, MA
Posts: 134
Thanks: 0
Thanked 0 Times in 0 Posts
I know that this is heresy but I believe high bitrate mpeg-2 caps look better than lossless avi's after converting and believe me I am quite picky about quality (thanks to Kwag and others here). I have tried many different methods of capturerng with many cards and many different postprocessing methods and nothing compares to my currnt method, IMHO. I originally bought my PVR-250 for the facts that incredible outlined, it is nice being able to use your computer while capturing and not having to worry about dropped frames and their end result of bad a/v sync, plus the fact that since I do a lot of capturing the storage space required for lossless codecs makes it an unrealistic and expensive option.
__________________
-Dano
Reply With Quote
  #4  
11-16-2003, 10:23 PM
audi2honda audi2honda is offline
Free Member
 
Join Date: Jun 2003
Location: Orange County, CA
Posts: 291
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Dano
I know that this is heresy but I believe high bitrate mpeg-2 caps look better than lossless avi's after converting and believe me I am quite picky about quality (thanks to Kwag and others here). I have tried many different methods of capturerng with many cards and many different postprocessing methods and nothing compares to my currnt method, IMHO. I originally bought my PVR-250 for the facts that incredible outlined, it is nice being able to use your computer while capturing and not having to worry about dropped frames and their end result of bad a/v sync, plus the fact that since I do a lot of capturing the storage space required for lossless codecs makes it an unrealistic and expensive option.
Thanks Dano, but I'm a bit confused...what is your current method? I'm thinking of picking this card up and it sounds like you've tried about everything. Care to share? Thanks
Reply With Quote
  #5  
11-16-2003, 10:28 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Hi audi2honda,

Pick up that card and encode MPEG-2 720x480 at 12Mbps.
You'll see what Dano means

-kwag
Reply With Quote
  #6  
11-16-2003, 10:32 PM
audi2honda audi2honda is offline
Free Member
 
Join Date: Jun 2003
Location: Orange County, CA
Posts: 291
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks kwag. I assume this is DVD compliant?

And one last question. How much space on average does 60 minutes of video take up at the setting you just suggested. I know it varies by content, but i'm just looking for a general idea.

Thanks
Reply With Quote
  #7  
11-16-2003, 10:52 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by audi2honda
Thanks kwag. I assume this is DVD compliant?
No
DVD compliant is ~9Mbps MAX
But for transcoding, go for the maximum that the card permits, which is 12Mbps.
Quote:

And one last question. How much space on average does 60 minutes of video take up at the setting you just suggested. I know it varies by content, but i'm just looking for a general idea.

Thanks
About 6GB per hour (with audio).

-kwag
Reply With Quote
  #8  
11-17-2003, 07:02 AM
Encoder Master Encoder Master is offline
Free Member
 
Join Date: Mar 2003
Location: (^_^)
Posts: 504
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
DVD compliant is ~9Mbps MAX
Max 9700kbps but I've seen DVDs which have a Highest Bitrate of 11MB
Reply With Quote
  #9  
11-17-2003, 07:21 AM
incredible incredible is offline
Free Member
 
Join Date: May 2003
Location: Germany
Posts: 3,189
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via ICQ to incredible
Well I did my experience testing the pvr 250 and Kwag posted really nice samples in here too. Even interlaced captures come out very well.

This card comes with a big encoding quality- CPU power preserving- and disk space safing potential!

But .... I hope Haupauge implementated also a alternate-scan-based quantsize-matrix to their hardware encoding engine, so interlaced sources will be handled at its best (especially when lowering the bitrate).

Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
How do you guys optimize your windows xp ? sparskter Computers 23 02-04-2006 08:12 AM
Hardware H264 decoder Dialhot Computers 6 01-06-2006 05:10 PM
HCEnc: Help Guys! azeter Video Encoding and Conversion 1 03-03-2005 03:15 AM
TV Capture: How to get Best Quality from the Best hardware FinalAeon Video Capturing / Recording 6 10-25-2003 10:48 AM
KVCD: How low CQ would you guys go? Adder Video Encoding and Conversion 4 02-04-2003 01:31 AM

Thread Tools



 
All times are GMT -5. The time now is 06:34 AM  —  vBulletin Jelsoft Enterprises Ltd