【ai】tx2-nx：c170 usb camera安装

设备识别为 /dev/video0

nvidia@tx2-nx:~/twork$ ls /dev/cam*
/dev/camchar-dbg /dev/camchar-echo
nvidia@tx2-nx:~/twork$ ls /dev/video*
/dev/video0

默认有安装ffmpeg

nvidia@tx2-nx:~/twork$ ffmpeg
ffmpeg version 3.4.11-0ubuntu0.1 Copyright © 2000-2022 the FFmpeg developers
built with gcc 7 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable