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<  MyStuff  ~  Jumping with MyStuff.

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Poppa Mintin
Posted: Wed Nov 30, 2011 4:47 pm Reply with quote
Frequent contributor Joined: 09 May 2011 Posts: 121 Location: Near Lincoln UK
Hi, a short while ago you guys helped when I had a problem with my Red 'Jump' button, this (sort of) continues from then, I thought it may be of interest.

I have my MyStuff 'Jump' buttons configured in this manner: -

Red: Back 20 Seconds: -20
Green: Forward 2 Minutes: 120
Yellow: Forward 30 Seconds: 30
Blue: Forward 10 Seconds: 10

With these times I can jump through ad's pretty well...
Sometimes though I might jump forward (say) 30 sec's and find I've gone too far, so I'd jump back 20sec, and then if that's too far back I'd jump forward 10 sec's.... an aggregate of 10 Sec's back... Simple. However...

When I did the back 30, forward 10, I'd find myself back pretty much where I was before I did the backward jump. So... I made myself a little video of a time display incrementing every 100mS, in the form where [ 0:15:08.5 ] would show 15Min's 8 Sec's. Now I can see what is happening...

I find in order to achieve my required timing (close enough) I need to set the jumps thus: -

Red: Back 20 Seconds: -24
Green: Forward 2 Minutes: 128
Yellow: Forward 30 Seconds: 30
Blue: Forward 10 Seconds: 9

I don't know if you claim any accuracy for MyStuff's jumps, I've not noticed anything to that effect, on the other hand of course, maybe there's something wrong with my Toppy.

Poppa.

PS. If anyone would like a copy of my little (Ten minute) video, I imagine that some means of making it available ought to be simple enough.

Pop.

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TAPs: EPG2MEI v0.96; MyStuff 6.4; Font Manager 1.0d; Extend v1.7; SecCache (UK) v0.4; EIT Sub (Game) v0.6; MHEG On/Off A3; MyInfo B5.6;
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mavison
Posted: Wed Nov 30, 2011 8:08 pm Reply with quote
Frequent contributor Joined: 30 May 2007 Posts: 223 Location: Kent, UK
Jump times are really approximate. As I understand it, one reason is that the transmitted signal only contains a complete picture at intervals. After a complete picture only the *differences* are transmitted. So any jump has to find the nearest (? or previous, or next?) complete picture before it can start the display. The intervals between complete pictures vary with program and channel, as it affects the overall data rate.

Others may be along with much better technical descriptions.

_________________
TF5800, TS On, F/W: MS6 Recommended F/W 12/9/2009 -Sy+BmC0CbCfCtDEvEzFsIPePsScUUuWfZ
TAPs: TAP Commander 1.34; EPG2MEI v0.96; Extend v1.7; Font Manager 1.0d; MyStuff 6.4; TF5000 Display v1.53; SecCache (UK) v0.4; EIT Sub (Game) v0.6; MyInfo B5.5; ScreenCapture with OSD V3.0; (Power Restore V0.7.7);
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juwlz
Posted: Thu Dec 01, 2011 3:55 am Reply with quote
MyStuff Team Joined: 12 Aug 2005 Posts: 10359 Location: Wokingham, Berkshire (Hannington transmitter)
I'm fairly certain that it always jumps to the *next* GOP, which is why forward jumps turn out to be bigger than backward jumps of the "same size". Note that GOPs vary in size depending on channel, so jumps that work a particular way on one channel may not work the same way on another.

Julie

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5810, TS On, F/W: F/W: MS6 Recommended F/W 12/9/2009 +BmCfCtFsR3Z
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Poppa Mintin
Posted: Sat Dec 03, 2011 12:51 pm Reply with quote
Frequent contributor Joined: 09 May 2011 Posts: 121 Location: Near Lincoln UK
juwlz wrote:
I'm fairly certain that it always jumps to the *next* GOP, which is why forward jumps turn out to be bigger than backward jumps of the "same size". Note that GOPs vary in size depending on channel, so jumps that work a particular way on one channel may not work the same way on another.

Julie
Thanks Julie, What's a GOP ?
Do you mean TV channel? e.g. (say) BBC1 and Channel 4 ?
Yes, I find that on some channels, 'Back 20' doesn't seem to go back as far as I expect, even after my 'time tweak'.

Poppa.

_________________
TF5810, TS On, F/W: MS6 Recommended F/W 12/9/2009
TAPs: EPG2MEI v0.96; MyStuff 6.4; Font Manager 1.0d; Extend v1.7; SecCache (UK) v0.4; EIT Sub (Game) v0.6; MHEG On/Off A3; MyInfo B5.6;
Sig generated by MyInfo on 16/3/12
wmwmwmwmwmwmwmwAlong with the sunshine, there has to be a little rain sometime.
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andyfras
Posted: Sat Dec 03, 2011 1:04 pm Reply with quote
Frequent contributor Joined: 25 Jul 2005 Posts: 3070 Location: Fleet, Hampshire (Hannington)
GOP = Group of pictures

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juwlz
Posted: Sat Dec 03, 2011 9:23 pm Reply with quote
MyStuff Team Joined: 12 Aug 2005 Posts: 10359 Location: Wokingham, Berkshire (Hannington transmitter)
Yes, I do mean TV channels. BBC channels typically have higher bit rates, so the GOP boundaries are closer together, resulting in more accurate jumps than on channels with lower bit rates where the GOP boundaries are further apart.

Julie

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5800, TS On, F/W: MS6 Recommended F/W 12/9/2009 -Sy+BmC0CfCtFsIMPePsR3UUuUxZ
5810, TS On, F/W: F/W: MS6 Recommended F/W 12/9/2009 +BmCfCtFsR3Z
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Poppa Mintin
Posted: Sun Dec 04, 2011 4:10 pm Reply with quote
Frequent contributor Joined: 09 May 2011 Posts: 121 Location: Near Lincoln UK
Thanks guys... Interesting.

Poppa.

_________________
TF5810, TS On, F/W: MS6 Recommended F/W 12/9/2009
TAPs: EPG2MEI v0.96; MyStuff 6.4; Font Manager 1.0d; Extend v1.7; SecCache (UK) v0.4; EIT Sub (Game) v0.6; MHEG On/Off A3; MyInfo B5.6;
Sig generated by MyInfo on 16/3/12
wmwmwmwmwmwmwmwAlong with the sunshine, there has to be a little rain sometime.
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