when open second usb camera,an error occur

Questions involving a Windows version of FFmpeg.
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jack123
Posts: 1
Joined: Mon May 20, 2019 10:36 am

when open second usb camera,an error occur

Post by jack123 » Mon May 20, 2019 10:50 am

When I open the second usb camera,a error occurs:
[dshow @ 000001d844a45600] Could not run graph (sometimes caused by a device already in use by other application)

my command:
1.ffplay -f dshow -i video="WKBB-180809"
2.ffplay -f dshow -i video="USB Camera"

ffmpeg version:
ffmpeg version N-93885-gc61d16cf3b Copyright (c) 2000-2019 the FFmpeg developers

system version: win10

but I can run this successfuly on the other WIN10 mache with the same two cameras.I don't how why,and can't search anything helpful.I am looking forward for your reply,thanks.

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