digitalFAQ.com Forums [Archives]

digitalFAQ.com Forums [Archives] (http://www.digitalfaq.com/archives/)
-   Video Capturing / Recording (http://www.digitalfaq.com/archives/capture/)
-   -   Why do you guys with PVR-250 hardware encoders re-encode? (http://www.digitalfaq.com/archives/capture/6739-guys-pvr-250-a.html)

audi2honda 11-16-2003 04:01 PM

Why do you guys with PVR-250 hardware encoders re-encode?
 
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.

incredible 11-16-2003 04:18 PM

Re: Why do you guys with PVR-250 hardware encoders re-encode
 
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 ;-)

Dano 11-16-2003 09:39 PM

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.

audi2honda 11-16-2003 10:23 PM

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 :D

kwag 11-16-2003 10:28 PM

Hi audi2honda,

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

-kwag

audi2honda 11-16-2003 10:32 PM

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

kwag 11-16-2003 10:52 PM

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

Encoder Master 11-17-2003 07:02 AM

Quote:

DVD compliant is ~9Mbps MAX
Max 9700kbps but I've seen DVDs which have a Highest Bitrate of 11MB 8O

incredible 11-17-2003 07:21 AM

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).

:?: :!:


All times are GMT -5. The time now is 12:22 AM  —  vBulletin Jelsoft Enterprises Ltd

Site design, images and content © 2002-2021 The Digital FAQ, www.digitalFAQ.com
Forum Software by vBulletin · Copyright © 2021 Jelsoft Enterprises Ltd.