Feature request: Exposure Lock

[MyNameIsTroll]

Hi, thanks for making this app, I'm having fun with it :)

When I do long timelapse and it's overcast and cloudy, I find that there are automatic exposure changes on the videos, it's not very nice unfortunately.

It would be nice to have an option to block the exposure.

[woheller69]

For normal video and time lapse video this apk sets setAutoExposureLock(true) after mediaRecorder.start()

I have no time to test, not sure if it works.
Please try.

Uninstall
Remove .zip
Install

app-release.apk.zip

[woheller69]

did you try it?

[MyNameIsTroll]

I didn't understand what I had to do, I uninstall the TimeLapseCamera app and install the apk in the zip?
Is that the modified application?

[woheller69]

yes, it is modified. Not sure if it makes a difference

[MyNameIsTroll]

All right, I'll try this weekend, I'll tell you if it works, thank you.

[ColinC101]

Hi,
I've encountered the exact same usecase with the autofocus function, as the phone tries to update the focus when brightness changes or movement occurs.

Would it be relevant / is there an easy way to implement such a feature to lock auto-focus when recording timelapse ? Feels like both those parameters are closely related

[woheller69]

You can try this.
I tried to lock AutoExposure, AutoWhiteBalance and AutoFocus after start of recorder (only for mp4 recordings)
app-release.apk.zip

Don't know if it works...

 	mMediaRecorder.start();
	Camera.Parameters params = mCamera.getParameters();
	mCamera.cancelAutoFocus();
	if (params.isAutoExposureLockSupported()) {
		params.setAutoExposureLock(true);
		Log.d("AutoExposureLock","true");
	} else Log.d("AutoExposureLock","not supported");
	if (params.isAutoWhiteBalanceLockSupported()) {
		params.setAutoWhiteBalanceLock(true);
		Log.d("AutoWhiteBalanceLock","true");
	} else Log.d("AutoWhiteBalanceLock","not supported");

[woheller69]

In my tests this does not seem to have any effect. Have you seen any improvements?

[MyNameIsTroll]

I'm sorry, I wanted to try but I couldn't install the application.
When I rename the zip file to apk my explorer opens the apk instead of installing it... I don't know how to do it :)

[woheller69]

try with TotalCommander

[MyNameIsTroll]

Thank you, it worked. I'll do a test today and let you know if it works.

[MyNameIsTroll]

After a few tries, I didn't notice any change. The automatic exposure is still on.

[woheller69]

then maybe it is not possible.
Maybe some day someone has an idea.

[ColinC101]

Finally able to do some tests on my side, I can confirm that it does not seem to change anything. Let's hope someone finds a way.

[andreasb242]

I got this working with my Camera 2 Branch: #39
But for now you need to configure ISO and Exposure manual, if you configure just one, it don't seem to work