SX10 - Extended TV - page 2 - General Discussion and Assistance

RaduP

926

Re: SX10 - Extended TV

« Reply #10 on: 21 / October / 2009, 13:11:02 »

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I was also thinking that the fluctuations shouldn't matter too much, until a higher exposure photo turned brighter than one with a lower exposure.

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barberofcivil

268

Re: SX10 - Extended TV

« Reply #11 on: 21 / October / 2009, 13:15:10 »

Quote from: RaduP on 21 / October / 2009, 13:11:02

I was also thinking that the fluctuations shouldn't matter too much, until a higher exposure photo turned brighter than one with a lower exposure.

Yeah, that's a random chance I suppose. Maybe run a few series to reduce the chance of this maybe.

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reyalp

14120

Re: SX10 - Extended TV

« Reply #12 on: 21 / October / 2009, 18:12:06 »

Quote from: RaduP on 21 / October / 2009, 03:45:49

I am not saying that I think this is the problem.

In other words, you haven't educated yourself enough on the nature of the problem to have a coherent theory. So why are you bringing it up ?

I had hoped you take the hint, but since you appear unwilling to do so, here's why you are wrong:
In every port, the original shutter overrides (as opposed to super long exposure) worked by setting the propcase values at some point after auto-exposure has happened (except in manual modes, where the manual control propcases may be used instead)

The canon code previously took these values unchanged for short exposures. In newer cameras, the value is changed, apparently some time after it has been retrieved from the propcase. We know this is the case, because the propcase value itself doesn't get clamped to the allowed range (if it did, barberofcivils code wouldn't work)

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barberofcivil

268

Re: SX10 - Extended TV

« Reply #13 on: 23 / October / 2009, 09:36:42 »

Can this be added to the trunk for autobuilds?
What's the procedure to get this implemented?

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reyalp

14120

Re: SX10 - Extended TV

« Reply #14 on: 23 / October / 2009, 15:59:56 »

Yes, this should probably be added to the trunk. If you have a complete patch ready to go, it would normally go in http://chdk.setepontos.com/index.php/topic,650.0.html but I have my eye on this thread here, so no need to repost.

Since it only changes it if the camera has changed the value, I guess we don't even need to decide which cameras it applies to. Of course, they must have ext_tv_range implemented for this to work.

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barberofcivil

268

Re: SX10 - Extended TV

« Reply #15 on: 23 / October / 2009, 16:49:49 »

Quote from: reyalp on 23 / October / 2009, 15:59:56

Yes, this should probably be added to the trunk. If you have a complete patch ready to go, it would normally go in http://chdk.setepontos.com/index.php/topic,650.0.html but I have my eye on this thread here, so no need to repost.

Since it only changes it if the camera has changed the value, I guess we don't even need to decide which cameras it applies to. Of course, they must have ext_tv_range implemented for this to work.

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sparky72

7
A650is SX-10is

Re: SX10 - Extended TV

« Reply #16 on: 30 / October / 2009, 14:45:48 »

Hello,

I' m really happy about this fix, but, I'm a newby and I dont know how to use the patch.
There is some kind guy that could help me?

Many thanks

Giorgio

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barberofcivil

268

Re: SX10 - Extended TV

« Reply #17 on: 30 / October / 2009, 15:15:29 »

Quote from: sparky72 on 30 / October / 2009, 14:45:48

Hello,
I' m really happy about this fix, but, I'm a newby and I dont know how to use the patch.
There is some kind guy that could help me?
Many thanks
Giorgio

This is a diff patch intended for the autobuild server.
(reyalp: can this get added anytime soon? or should I be posting it elsewhere? I think this was against the 820 trunk, do I need to do a more up-to-date one?)

If you know how to compile the CHDK, then it you can add in the changes yourself, just modify generic/wrappers.c as indicated in my original post. Otherwise you'll have to wait until someone can add it to the autobuild (or if you ask nicely, and tell me your FW vers I can compile a test build for you).

-tgq

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reyalp

14120

Re: SX10 - Extended TV

« Reply #18 on: 30 / October / 2009, 16:03:00 »

Quote from: barberofcivil on 30 / October / 2009, 15:15:29

This is a diff patch intended for the autobuild server.
(reyalp: can this get added anytime soon? or should I be posting it elsewhere? I think this was against the 820 trunk, do I need to do a more up-to-date one?)

Nothing else you need to do, I just haven't got around to it yet because all my source trees are a mess.

FWIW, whims gui for building CHKD http://chdk.setepontos.com/index.php/topic,845.0.html is reported to be very good and AFAIK even includes applying patches.

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barberofcivil

268

Re: SX10 - Extended TV

« Reply #19 on: 30 / October / 2009, 16:47:51 »

Quote from: reyalp on 30 / October / 2009, 16:03:00

Nothing else you need to do, I just haven't got around to it yet because all my source trees are a mess.

FWIW, whims gui for building CHKD http://chdk.setepontos.com/index.php/topic,845.0.html is reported to be very good and AFAIK even includes applying patches.

OK, that's good.

Yes, whim's CHDK compiler is awesome, that's what I've been using. I created the diff patch with it as well, never tried applying a patch though.

-tgq

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