Mpeg video Quailty settins questions.

General discussion about PS3 Media Server (no support or requests)

Mpeg video Quailty settins questions.

Postby Corran006 » Tue May 05, 2009 10:03 pm

Hey all,

I am pretty new to using PS3 Media Sever and I was wondering if a thing or two could be explained to me.

So we have the values for the Mpeg video Quality. What do Keyint, Vqmax, and VQmin mean? right now I am using keyint=3:vqmax=5:vqmin=2

second, the max bandwidth box value means how fast it will send over to to PlayStation 3 on my network?

How do I lower the file size of converted amine that has to have the subs hard encoded. seems to end up being way larger then mkv2vob does. on slow H264 setting.

Thanks.
Corran006
 
Posts: 1
Joined: Tue May 05, 2009 9:53 pm

Re: Mpeg video Quailty settins questions.

Postby otmanix » Sun May 10, 2009 8:33 pm

vqmax, vqmin, vqscale are mpg2 quantizer parameters for video compression. 0 is best quality (low cpu, high bandwith), the higher the worse quality becomes (higher cpu, lower bandwith)
http://www.webopedia.com/TERM/Q/quantization.html
http://bmrc.berkeley.edu/research/mpeg/faq/mpeg2-v38/faq_v38.html

keyint is the mpg2 parameter for keyframe. keyframe=5 means that every fifth frame is a keyframe. the higher the worse quality becomes
http://en.wikipedia.org/wiki/Keyframe
I provide NO application support via PM, so please post your question to the forum.
PS3 Media Server related articles on my blog: http://otmanix.de/?cat=11&lang=en
User avatar
otmanix
 
Posts: 528
Joined: Fri Jan 30, 2009 12:40 am
Location: Bavaria, Germany

Re: Mpeg video Quailty settins questions.

Postby ExSport » Sun May 10, 2009 9:08 pm

About keyframes it is not true.
Higher keyint uses lower bandwith but quality is same. Keyint=1 means every frame is key frame so it contains all information about frame. Keyint=10 means only one key frame used and all other frames contain only "difference" info from keyframe=lower size of frames. Next 9 frames are computed with help of key frame.
ExSport
 
Posts: 2167
Joined: Mon Jan 19, 2009 5:40 pm


Return to General Discussion

Who is online

Users browsing this forum: No registered users and 6 guests