Natron - illegal short term buffer state detected

Software Natron
,
1

Hello guys,

I have this report in Natron :

[h264 @ 000000001db35600] illegal short term buffer state detected
[h264 @ 000000001db39140] illegal short term buffer state detected
Object::connect: No such signal GenericWatcher::taskFinished(int,WatcherCallerArgsPtr)
Object::connect: No such signal GenericWatcher::taskFinished(int,WatcherCallerArgsPtr)

I am trying to connect a Tracker node to an image. The image should follow the track but does not and sometimes Natron crashes when i click on reset all animation of the corner pin.

Thank you for your help.