Am 07.10.2022 um 21:32 schrieb i...@mbsoft.biz:
I have tried

ffmpeg.exe" -loglevel quiet -analyzeduration 0 -probesize 32 -report -i
"e:\\logo.png" -f dshow -video_size 1280x720 -framerate 30
-video_device_number 0 -i "video=Full HD 1080P PC Camera" "sendcmd='5.0"
streamselect map "1',streamselect=inputs=2:map=0" out.mp4

buti t do not work

I think there are several errors in your command line. But even after I corrected them, I didn't find a working example with streamselect.

But I found a working example with "overlay" filter. You must change your camera name. Make sure that the image has the same size as the camera.

ffmpeg -loop 1 -framerate 10 -i img.jpg -f dshow -video_size 1280x720 -framerate 10 -i video="BisonCam,NB Pro" -lavfi [0]format=rgb24[a];[1]format=rgb24[b];[b][a]overlay=enable='lt(t,5)':format=rgb -f sdl2 -

Michael


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