# 2022-07-27

Raspberry Pi Zero 2W  with 'ZeroCam'.

## stills at 0.5s intervals, stopping 10s from the command start, output names by unix timestamp 
$ raspistill  -e jpg -tl 500 -ts -bm -t 10000 -o s%d.jpg
$ raspistill -w 1920 -h 1080 -e jpg -tl 500 -ts -bm -t 10000 -o s%d.jpg



## video to file

$ raspivid -t 6000 -l --framerate 30 --width 1920 --height 1080 -o v.264 
#   followed by: 
$ MP4Box -add v.264 v.mp4 

# set:   -t 0   for endless
 
# --qp is quality parameter: '10 to 40', higher being lower quality and thus smaller size (probably like our familiar ~22--28 quality in mencoder 264 encoding) 
# --bitrate 0 [bps] leaves rate entirely automatic 
$ raspivid -t 6000 -l --bitrate 0 --qp 24  --framerate 30 --width 1920 --height 1080 -o oot.264 


# other possibility ... not working nicely for us [yet]
v4l2-ctl --set-fmt-video=width=1920,height=1080 -d /dev/video0 
v4l2-ctl -d /dev/video0 --stream-mmap=4 --stream-to file.out 



## streaming 

#?needed? or loaded anyway?
# modprobe -v bcm2835-v4l2

# this worked
rpi    $  raspivid -t 0 -l -o tcp://0.0.0.0:3333
client $  cvlc  tcp/h264://rpi0:3333/

# or non-default values
rpi    $  raspivid -h 480 -w 640 -fps 10 -t 0 -l -o tcp://0.0.0.0:3333


# one option
$ git clone https://github.com/mpromonet/v4l2rtspserver.git
$ cd v4l2rtspserver && cmake . && make -j4 
$ ./v4l2rtspserver -W 1920 -H 1080 -F 10

# another 
cvlc  v4l2:///dev/video0 --v4l2-width 1920 --v4l2-height 1080 --v4l2-chroma h264 --sout '#standard{access=http,mux=ts,dst=0.0.0.0:5555}'