Hi everyone!
I want to take a picture from a webcam (to send it in a http server's
response). I already found a command to take a picture and write it to
stdout (from where I can grab it in the http server):
ffmpeg -f video4linux2 -video_size 1920x1080 -input_format yuyv422 -i
/dev/video0 -f image2 -frames:v 1 -qscale:v 1 pipe:1
The only drawback is that it takes about 3 seconds to get the picture.
The delay comes from ffmpeg (not from the server/network), probably
because it needs to wait for the webcam to initialize.
Now my idea is to somehow keep the webcam active and grab the current
video frame whenever a http request comes in. But I do not know how to
do this with ffmpeg (on linux). Can I use one instance of ffmpeg to
capture the webcam video and stream it *somewhere*, and then use a
second instance of ffmpeg to extract the current frame of that stream?
Or is there a better way to do it?
Thanks!
Stefan Kleeschulte
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