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video record A3400

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Offline timgor

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video record A3400
« on: 14 / October / 2013, 16:44:41 »
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I got a problem with video recording.
The normal start-stop video would be
Code: [Select]
click("video")
sleep(...)
click("video")

on some reason the first click may not start video and I need to do
Code: [Select]
repeat click("video") sleep(1000)until get_video_status == started...
sleep(...)
click("video")[/code]


what can be the problem?
what is the difference between click("video") and press("video")?

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Offline msl

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Re: video record A3400
« Reply #1 on: 14 / October / 2013, 17:23:01 »
'press' needs a 'release'. 'click' is the combination of 'press' + 'release'.

You can try for start recording this:
Code: [Select]
press("video")
sleep(500) -- play with the sleep time
release("video")msl
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Offline waterwingz

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Re: video record A3400
« Reply #2 on: 14 / October / 2013, 17:55:52 »
Quote from: timgor on 14 / October / 2013, 16:44:41
on some reason the first click may not start video and I need to do
Code: [Select]
repeat click("video") sleep(1000)until get_video_status == started...
sleep(...)
click("video")what can be the problem?
what is the difference between click("video") and press("video")?
The problem is that the "click"  presses and releases the specified button very quickly.  On some camera there are functions that require the button to be pressed for slightly longer than the "click" function presses.  In those cases, you need to use a press and release with a delay between the two statements.
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Offline timgor

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Re: video record A3400
« Reply #3 on: 14 / October / 2013, 18:01:19 »
Thanks for reply. Will try it. But it reminds me a joke about too slow electricity.
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Offline philmoz

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Re: video record A3400
« Reply #4 on: 14 / October / 2013, 18:17:59 »
Quote from: waterwingz on 14 / October / 2013, 17:55:52
Quote from: timgor on 14 / October / 2013, 16:44:41
on some reason the first click may not start video and I need to do
Code: [Select]
repeat click("video") sleep(1000)until get_video_status == started...
sleep(...)
click("video")what can be the problem?
what is the difference between click("video") and press("video")?
The problem is that the "click"  presses and releases the specified button very quickly.  On some camera there are functions that require the button to be pressed for slightly longer than the "click" function presses.  In those cases, you need to use a press and release with a delay between the two statements.

Or increase the value of CAM_KEY_PRESS_DELAY in platform_camera.h.

Default is 30ms, G1X & SX40 (amongst others) requires this be increased to 60ms.

Phil.
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Offline waterwingz

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Re: video record A3400
« Reply #5 on: 14 / October / 2013, 18:25:27 »
Quote from: philmoz on 14 / October / 2013, 18:17:59
Or increase the value of CAM_KEY_PRESS_DELAY in platform_camera.h.  Default is 30ms, G1X & SX40 (amongst others) requires this be increased to 60ms.
For clarity,  this requires rebuilding the CHDK source code for the change to take effect.  This is not something an "end user" can do with the CHDK distribution file.
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