gst-launch-1.0 -vvv v4l2src ! "video/x-raw,'''<span style="color:red;">framerate=60/1</span>''',format=UYVY" ! v4l2h264enc extra-controls="controls,h264_profile=4,h264_level=13,video_bitrate=256000;" ! "video/x-h264,profile=high, level=(string)4.2" ! h264parse ! queue ! matroskamux name=mux ! filesink location=foo.mkv
==Use raspistill to take photos== Note: raspistill is removed from Raspberry pi Bullseys OS. Raspistil function: run the camera at a specified time, and capture jpg images if necessary. Format:raspistill [options] Main image parameters and commands: -?, --Help: help document -w. -- width: set the image width < size > width !-h. -增加评论功能！ - height: set image height < size > height -q. -- Quality: set JPEG quality < 0 to 100 > -r. -- raw: add raw raw Bayer data to JPEG metadata -o. -- output: output file name < file name comments />, -l. -- Latest: link the latest complete image to the specified file < file name > -v. -- verb: output details when running the camera -t. -- timeout: the time delay is specified when photographing and closing. If it is not specified, the default is 5S -e. -- encoding: encode to output the specified format file (jpg, BMP, GIF, PNG) -TL, - timelapse: take one picture every < MS > at intervals -k. -- keypress: press the key to trigger, press' Enter 'to take a picture, press' x' and then 'Enter' to exit -s. - signal: signal triggered, waiting for another process signal to take a picture -GC, - glcapture: capture GL frame buffer instead of camera image -Set, - settings: retrieve the camera settings and write them to stdout -CS, - camselect: select camera device < digital >, default 0 The above is just a list of some common commands. More detailed commands can be used by Baidu, Google or viewing help documents. Here are some specific examples: After a delay of two seconds (in milliseconds), take a picture and save it as image.jpg.raspistill -t 2000 -o image.jpg Take a custom size photo.raspistill -t 2000 -o image.jpg -w 640 -h 480 Record a 5 second video clip (1080p25) using the default settings.raspivid -t 5000 -o video.h264 Save to file a 5 second encoded camera stream image raspivid - t 5000 - O - > My_file.h264