[Android Apps and Games] bit2:
Tested the open source variant from Play Store (v0.3.5) on a Samsung Galaxy Nexus ("maguro") running CyanogenMod 11 (SNAPSHOT-M9).

It works fine, thanks for sharing this with the public. :)

I've a few smaller issues though:

1.) When recording video in Full HD resolution (1920x1080), the recorded video has only 15 fps. If I record a video with Google's Camera app in Full HD, the recorded video has 23.9 fps. The same (higher) framerate is achieved using Open Camera's video recording. The latter is fully open source (https://play.google.com/store/apps/details?id=net.sourceforge.opencamera, http://opencamera.sourceforge.net/), so maybe you could get an idea on what it does differently to get the higher video framerate.

I've attached the logging.txt created by Spy Camera. It seems that SC only specifies a generic profile for video recording and lets the system decide what framerate should be used. My guess is that Google's Camera and Open Camera evaluate the list of available framerates (for the given resolution) and both explicitly specify the fps for the video recording. Of course I don't know who this works, I've no clue about the API that is used here. :) It's just an idea.

2.) There seems to be no autofocus in video recording mode. Both using Google's Camera or Open Camera, I get a focused video picture. With Spy Camera the video image seems to be a bit blurred (out of focus). Is there maybe any way to enable autofocus for video recording (if supported on the given device)?

3.) In the app settings the max file size is limited to 4GB (ot at least it seems to be). In the donation version one can change the max file size and enable auto splitting. However in the open source version the slider is on the right edge and the value is set to 4GB. I guess that one cannot set the limit higher even in the donation version. It'd be nice if there was an option to disable the size limit alltogether. With Google's Camera and Open Camera I can create videos of arbitrary filesize (i.e. no limit) on the internal storage (which has ext4 filesystem and thus the theoretical max. filesize is way bigger than the ~16GB internal storage that is available to the user).

Thanks for looking into these. :)

One more question: is there a way to start black screen video recording from outside the app? I saw that there're two activities in Spy Camera which might let me launch SC in video recording mode (one is com.jwork.spycamera.SpyCamCommand, but it most probably expects specific parameters, because launching this activity results in no perceivable result ... the other is com.jwork.spycamera.SpyCamBlackActivity, but it simply puts SC into black screen mode and no action is started). My goal is to create an app (or simply a Tasker task + a shortcut on a home screen to launch it) that when started, launches Spy Camera in black screen mode and starts Full HD video recording. I'd like to use Spy Camera as a dash cam app in my car and to make my life simple, I'd like to have a single shortcut on my home screen that would launch the video recording (in black screen mode). Furthermore it'd be nice if I could end the recording (and exit SC) just by touching the black screen. The "Mobile Hidden Camera" app (https://play.google.com/store/apps/details?id=com.zecurisoft.mhc1202) does have this feature and makes things a lot easier.