[FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

Brenda Spinner brendaspinner at gmail.com
Sun May 20 01:34:17 EEST 2018

I am using the following line to preview my webcam:

ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f dshow
-i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"

this line works fine with cam #1, however when try it with cam #2, I get
the error:

[dshow @ 00000000002d8920] Could not set video options video=Logitech
Cam#2: I/O error

Can anyone tell me why this is happening. I would like to able to preview
both webcams at the same time?

Thanks, Frank


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