CODEWITHSUNDEEP
raspberry-pigstreamermotion-detectiongst-launch-1.0
G. d'Errico
G. d'Errico

Reputation: 21

gstreamer from RTSP stream, change resolution

I have a Raspberry Pi zero running v4l2rtspserver and transmitting an RTSP stream with H264-encoded 1640x1232 frames. I'd like gst-launch-1.0 to connect to it, change its resolution, and dump it somewhere.

Since I can't seem to get it right and since my history | grep gst-launch | wc -l marks over 500, I thought I'd beg for help.

For those who are wondering this is my problem: Raspberrypi Zero is too slow to run MotionEyeOS and so I'd like to optimize motion-detection by running motion on a scaled-down video stream (160x120, from a pipe or a loopback device) while retaining a full-scale video stream (via RTSP preferably, but also anything else would be ok). In other words, I'm trying to split the output from the camera in 2 streams and change one stream's resolution.

Any other setup to achieve this (I've tried a few: v4l2loopback, ffmpeg + ffserver, mjpeg_streamer etc.) would be fine.

Upvotes: 1

Views: 4945

Answers (1)

G. d'Errico
G. d'Errico

Reputation: 21

I finally found it. So...assuming you have v4l2rtspserver running with the default params, the gstreamer 1.0 pipeline to resize the video on the fly is:

gst-launch-1.0 -e rtspsrc location="rtsp://127.0.0.1:8554/unicast" ! capsfilter caps="application/x-rtp, media=(string)video, payload=(int)96, encoding-name=(string)H264" ! queue ! rtph264depay ! h264parse ! avdec_h264 ! queue ! videoconvert ! videoscale ! video/x-raw,width=160,height=120 ! avenc_h264_omx ! h264parse ! matroskamux ! filesink location=./video.mkv

Upvotes: 1

Related Questions