Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
What's On, Transponder and channel support
Adult satellite channels
Sexview issues since Friday 30th Oct?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="elmin" data-source="post: 813978" data-attributes="member: 181640"><p>I'm no expert either. I just try to match up the behaviour I'm seeing with the descriptions of how MPEG-2 works.</p><p></p><p>As an example; you can save bandwidth by not transmitting a full frame as often. Instead, you replace it with more frames that just describe changes instead of the actual full picture.</p><p></p><p>These sequences of 'full picture' ,... 'changes', ... 'changes',... are called groups of pictures, or GOPs</p><p></p><p>_en.wikipedia.org/wiki/Group_of_pictures</p><p></p><p>Nearly all broadcasters don't mess with this setting and use the standard pattern IBBPBBPBBPBB...IBBPBBPBBPBB or 3,12 GOP. If you make this sequence longer, you can save bandwidth, but it takes longer for your box to open the channel, because it has to wait for the next complete picture - the 'I' frame.</p><p></p><p>If a broadcaster was so breathtakingly stupid as to transmit a _really_ long GOP, it might take many seconds for the channel to clear, and it may hit a decoding timeout put in the box firmware, causing a 'channel not running or scrambled' message to pop up on the screen.</p><p></p><p>That fits what I'm seeing on my box <img src="http://www.satellites.co.uk/satellite/../php-bin/forum/images/smilies/confused.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p></p><p>When was their last f/w update ?</p></blockquote><p></p>
[QUOTE="elmin, post: 813978, member: 181640"] I'm no expert either. I just try to match up the behaviour I'm seeing with the descriptions of how MPEG-2 works. As an example; you can save bandwidth by not transmitting a full frame as often. Instead, you replace it with more frames that just describe changes instead of the actual full picture. These sequences of 'full picture' ,... 'changes', ... 'changes',... are called groups of pictures, or GOPs _en.wikipedia.org/wiki/Group_of_pictures Nearly all broadcasters don't mess with this setting and use the standard pattern IBBPBBPBBPBB...IBBPBBPBBPBB or 3,12 GOP. If you make this sequence longer, you can save bandwidth, but it takes longer for your box to open the channel, because it has to wait for the next complete picture - the 'I' frame. If a broadcaster was so breathtakingly stupid as to transmit a _really_ long GOP, it might take many seconds for the channel to clear, and it may hit a decoding timeout put in the box firmware, causing a 'channel not running or scrambled' message to pop up on the screen. That fits what I'm seeing on my box [IMG]http://www.satellites.co.uk/satellite/../php-bin/forum/images/smilies/confused.gif[/IMG] When was their last f/w update ? [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
What's On, Transponder and channel support
Adult satellite channels
Sexview issues since Friday 30th Oct?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top