Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode? - page 4 - Feature Requests - CHDK Forum
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Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?

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Offline vit40

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #30 on: 17 / June / 2008, 10:40:25 »
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Yes, A620
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Offline ewavr

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #31 on: 18 / June / 2008, 14:44:23 »
Test version with AF support in video recording here - http://ewavr.nm.ru/chdk/for_test/ - for A-series, G7 and TX1 (w. src.).

@wap4
edit:
Confirmed on A650 (also DRYOS) - ExpCtrlTool_StartConti() function crashes the camera.
« Last Edit: 18 / June / 2008, 16:46:21 by ewavr »
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Offline a710is

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #32 on: 19 / June / 2008, 04:24:57 »
you've even done the muting during refocusing. respect and big thanks ewavr :)
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Offline Stimpy

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #33 on: 23 / June / 2008, 07:50:42 »
I tried the test version on my A640, & it works great! Cheers Ewavr!
I notice that when engaging the auto focus while recording that the camera will "gain up" to max ISO - this is also recorded onto the movie clip, any way around this?

Is it possible you can implement a similar system in the menu for AElock, ie you can assign this to the "Up" key....?










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Offline dzsemx

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #34 on: 24 / June / 2008, 12:57:21 »
on a630 everything works fine with autofocus in video
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Offline wap4

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #35 on: 01 / July / 2008, 01:10:01 »
Quote from: ewavr on 18 / June / 2008, 14:44:23
@wap4
edit:
Confirmed on A650 (also DRYOS) - ExpCtrlTool_StartConti() function crashes the camera.

Thanks ewavr for finding out alternative functions that control exposure in dryos cams without crashing.
Anyone interested may see Changeset 426 - chdk - Trac . Now I think I can fulfill my wish without crashing the camera.

A little offtopic query here:- How do you find that a sub is void or it takes some arguments ?

Edit: I've been successful at last in locking exposure by changing the MakeAFscan() function (experimentally) in wrappers.c
as follows:-

void MakeAFScan(void){
 _ExpCtrlTool_StopContiAE(0,0);
}

as simple as that!
 
« Last Edit: 01 / July / 2008, 02:16:02 by wap4 »
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Offline ewavr

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #36 on: 03 / August / 2008, 20:10:10 »
So, answer for subject question is 'yes':

ExpCtrlTool_StopContiAE();
short tv=96*2;
SetAE_ShutterSpeed(&tv);

sets frame exposure speed to 1/4 sec, capture speed also changes (1" on display ~ 5" real time ). Playback speed, of course, is unchanged (30 fps) - we have time-lapse movie in camera :)

Another functions (derived from SetAE_CdsGainValue, can be found on strings "SetCDSGainApex" and "SetPgaGain") allow change ISO during video recording. Of course, AE must be turned off before call it (ExpCtrlTool_StopContiAE).
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Offline Stimpy

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #37 on: 05 / August / 2008, 09:23:35 »
Thanks for the great news Ewavr!
I was about to post a feature request for Timelapse in movie, but it looks like you've already cracked it!
Great work!










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Offline ewavr

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #38 on: 29 / August / 2008, 08:23:41 »
Well, experimental build (Allbest based) for most A-series cameras with Ev correction in video here (with src.)
When video is recorded, press "+/-" ("disp" for cameras without "+/-") key. Exposure is locked and you can use <- and -> keys to adjust it (0.5 Ev step, Ev display present on screen). Press "+/-" again to exit this mode; after optical zooming or refocusing this mode disables automatically.
Unfortunately, positive Ev correction is available only in bright environment (in this version CHDK can change only exposure time, not aperture or ISO).
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Offline PS

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Re: Will Override Shutter/ISO or Aperture ever be enabled in Movie Mode?
« Reply #39 on: 29 / August / 2008, 10:34:36 »
Quote from: ewavr on 29 / August / 2008, 08:23:41
Unfortunately, positive Ev correction is available only in bright environment (in this version CHDK can change only exposure time, not aperture or ISO).
What is the slowest shutter speed available then? Is it 1/x sec. for x fps movies?
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