[Flightgear-devel] Heads up: --jpg-httpd is gone

[Torsten D. <To...@t3...>]

Hi all,

I have just disabled the --jpg-httpd option to give way for the 
screenshot uri handler of the mongoose httpd.

You can access the new screenshot handler after starting with 
--httpd=8080 at http://localhost:8080/screenshot

It understands some request parameters:
type: either png or jpg (guess what this does)
window: the name of the window to capture (for those with multi screen 
setups)
stream: provide mjpeg stream

Examples:

http://localhost:8080/screenshot?type=png
send png instead of jpg (jpg is default)

http://localhost:8080/screenshot?type=png&window=WindowA
send a png screenshot from the window named "WindowA" as defined under 
rendering/camera-group/window/name in your screen configuration.

http://localhost:8080/screenshot?window=WindowA
do the same as before, but use default jpg encoding

http://localhost:8080/screenshot?window=WindowA&stream=y
same as before, but not just send a single image but a motion-jpeg 
encoded video stream.
Can be used by ffmpeg to directly encode various video formats.
try ffplay -f mjpeg http://localhost:8080/screenshot/stream=y

Compression level for PNG is hardcoded to 9 (highest) and JPEG_QUALITY 
hardcoded to 80.
These seem to be a good balance of performance vs. quality.

Enjoy,
Torsten