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On 6 September 2014 14:59:34 CEST, meino.cramer@×××.de wrote: |
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>Hi, |
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> |
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>may be the software I am looking for already exists of |
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>can easily created by plugging together already existing pieces: |
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> |
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>With a Logitech c920 webcam (Full HD) I plan to record birds on |
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>my roof. |
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>I need to record "everything": Starting from the birds landing |
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>on the roof until the fligh away again. |
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> |
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>Since the camera delivers Full HD video AND I need the "complete |
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>movie" of the bird motion detection is not suitable here: Decoding |
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>analyzing and reencoding in case of recording would take to much |
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>horsepower... |
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> |
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>But |
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>Normally I will recogize the birds after the landed on the roof. |
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> |
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>My idea is to do something like loop recoording: |
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>The stream is cut into pieces of 5 minutes length. |
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> |
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>If I dont hit "ENTER" (or something similar) the previously recorded |
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>piece of video gets delted after the current one has been completly |
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>recorded. |
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> |
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>If I hit ENTER no deletion is performed until I hit ENTER again. |
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> |
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>I already have a script hacked together with a gst-launch command, |
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>which is able to fetch the Full HD hardware encoded stream from |
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>the C920 and put it on the harddisk. |
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> |
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>But I failed in creating a script which allows me to simultanously |
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>watch the material which gets recorded just in the same moment. |
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> |
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>Is there any software or script or <fill in something appropiate here> |
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>which does this loop recording as described above AND is able to pull |
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>the Full HD stream correctly from the C920? |
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> |
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>Where can I proceed? |
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> |
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>Thank you very much in advance for any help! |
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>Best regards and have a nice weekend! |
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>mcc |
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|
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A very long time ago (around 1999) I wrote a simple tool that allowed me to have 2 normal clients access the same stream. |
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It consisted of a simple V4L client tool that hooked I to /dev/video0 and copied all the data to /dev/video1 and /dev/video3. |
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I then had a kernel module taking the data from /dev/video1 and outputting it to /dev/video2 (and same for 3 and 4). |
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|
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This did work back then. To allow motion to work on video2 and a streaming webcam on a public website on video4. |
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Something similar might exist for V4L2. |
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|
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-- |
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Joost |
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-- |
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Sent from my Android device with K-9 Mail. Please excuse my brevity. |
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