[gentoo-user] OT: In search of a hint/ides: Loop recording of a webcam

[meino.cramer@gmx.de]

Hi,

may be the software I am looking for already exists of
can easily created by plugging together already existing pieces:

With a Logitech c920 webcam (Full HD) I plan to record birds on
my roof.
I need to record "everything": Starting from the birds landing
on the roof until the fligh away again.

Since the camera delivers Full HD video AND I need the "complete
movie" of the bird motion detection is not suitable here: Decoding
analyzing and reencoding in case of recording would take to much
horsepower...

But
Normally I will recogize the birds after the landed on the roof.

My idea is to do something like loop recoording:
The stream is cut into pieces of 5 minutes length.

If I dont hit "ENTER" (or something similar) the previously recorded
piece of video gets delted after the current one has been completly
recorded.

If I hit ENTER no deletion is performed until I hit ENTER again.

I already have a script hacked together with a gst-launch command,
which is able to fetch the Full HD hardware encoded stream from
the C920 and put it on the harddisk.

But I failed in creating a script which allows me to simultanously
watch the material which gets recorded just in the same moment.

Is there any software or script or <fill in something appropiate here>
which does this loop recording as described above AND is able to pull
the Full HD stream correctly from the C920?

Where can I proceed?

Thank you very much in advance for any help!
Best regards and have a nice weekend!
mcc