Play RTSP stream and desktop screen with the lowest possible delay

[rtek1000]

Hello,

I liked this application ffpyplayer, I was able to find examples of how to put buttons in the kivy application, but I couldn't reproduce the desktop screen and I couldn't reduce the delay of the live stream, which was a few seconds. I haven't found many ways to embed ffplay in a window.

To replicate the desktop:

ffplay -loglevel error -hide_banner -af "volume=0.0" -flags low_delay -f gdigrab -i desktop -offset_x 100 -offset_y 100 -video_size 640x480 -left 0 -top 300 -x 400 -y 225

The command to play the RTSP live stream with little delay that I found is this, ffplay plays well images from security cameras with support for ONVIF protocol, 1080p image, H.264 or H.265:

ffplay -loglevel error -hide_banner -af "volume=0.0" -flags low_delay -vf setpts=0 -rtsp_transport tcp rtsp://user:passwd@192.168.1.181:554/live/0/main -left 0 -top 50 -x 400 -y 225

I understand that it is difficult to have a camera on hand to test the RTSP stream, but there is ONVIF server software that emulates a camera stream to play files or the desktop screen, for example.

ffplay -loglevel error -hide_banner -af "volume=0.0" -flags low_delay -vf setpts=0 -rtsp_transport tcp rtsp://192.168.1.35/screenlive -left 0 -top 50 -x 400 -y 225

If I run ffplay directly, there is practically no delay, but with the test.py example, the user can already notice that there is a delay.

The exemple https://github.com/matham/ffpyplayer/blob/master/examples/test.py

ONVIF server software:
https://www.happytimesoft.com/products/onvif-server/index.html

Could you tell me how I can set the ffplay command flags in ffpyplayer?

Another thing is about the log, I tried leaving log_level = 'error', but I continued to have debug type messages. Then I tried other ways, but I didn't have much success.

    def on_start(self):
        self.callback_ref = WeakMethod(self.callback)
        filename = 'rtsp://192.168.1.35/screenlive' #sys.argv[1]
        logging.info('ffpyplayer: Playing file "{}"'.format(filename))
        # try ff_opts = {'vf':'edgedetect'} http://ffmpeg.org/ffmpeg-filters.html
        ff_opts = {'loglevel': 'error', 'fflags': 'low_delay'}
        self.ffplayer = MediaPlayer(filename, callback=self.callback_ref,
                                    loglevel=log_level, ff_opts=ff_opts)