What might be the cause of messages like "SoftMJPG:: THREAD Exit routine process" (LG D724 G, 4.4.2)?

I connected my device (LG D724 G3, android 4.4.2) to adb and I started receiving messages:

03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.363     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.373     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16292/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383    284-16915/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process
03-03 10:42:23.383     284-5950/? D/SoftMJPG﹕ SoftMJPG:: THREAD Exit routine process

As you can see, in 10 ms there are as much as more than 40 such messages. I'm aware that MJPG is a video compression format. But both the front and the main cameras are off. What app might cause this? I tried to restart my phone. I also tried to kill all processes. But the messages are still going. Maybe this is normal?