Re^2: Perl wrapper for v4l2-ctl

Thanks to both of you for the replies.

I didn't realize that streaming to two locations simultaneously (display and file) would be problematic.

I ordered my camera from Amazon Canada this morning and it should be here in a couple of days. At that time I'll commence playing around with various options.

On another note, my GPS receivers came in today, so I'll be picking that up after work, so hopefully I'll have a Perl module for the GPS side of things (wrapped C, of course). One will be used with the Pi for the same project (so I can embed the coordinates in the video directly), and the other for my Arduino Trinket Pro, as I'm making my own GPS device for when I'm out on my days-long mountain hikes (yes, I could buy one, but where's the fun in that ;)

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Re^3: Perl wrapper for v4l2-ctl
by zentara (Archbishop) on May 15, 2017 at 20:47 UTC

I also came across something for you to google around for. It is claimed that Gstreamer, which has a Perl module, has the ability to duplex the video feed from one camera. That is what we need, take 1 camera output and split it into 2 identical streams. It dosn't seem it should be that hard, but it eludes us for now. ffmpeg seems to be able to do it, see ffmpeg multiple outputs. I'm going to play with that.

UPDATE0 These 2 links are the most promising leads. Use a kernel module 2 split the /dev/video stream, then use whatever to display 1 stream and record another. v4l2loopback module and splitting /dev/video to 2 streams .

UPDATE1It works! Here is how to split /dev0 into /dev/video1 and /dev/video2

modprobe v4l2loopback devices=2   # as root
 # then                
ffmpeg -f v4l2 -i /dev/video0 -f v4l2 /dev/video1 -f v4l2 /dev/video2
[download]

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