Example-2: (USB-Camera → Encode → Decode → Display) - 2020.2 English

vcu-demo-camera-encode-decode-display.sh -s 640x480

ALSA Library API

vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac --use-alsasrc -i "hw:1,0" --use-alsasink --audio-output "hw:0,0"

Pulse Library API

vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac -i "alsa_input.usb-  
046d_HD_Pro_Webcam_C920_C06272EF-02. analog-stereo" \
--use-pulsesrc --use-pulsesink --audio-output "alsa_output. 
platform-fd4a0000.zynqmp- display_zynqmp_dp_snd_card. analog-stereo"

Gstreamer Autoaudiosrc and Autoaudiosink plugins

vcu-demo-camera-encode-decode-display.sh -s 640x480 -a aac

Note: In above example using gstreamer auto plugins, gstreamer selects the API and devices to be used for capture and playback automatically. Normally, it tries to use default devices enumerated at bootup by pulseaudio server or as mentioned in the alsa configuration file. So, it might not choose the device you want to use sometimes, in which case you can use the above-mentioned script arguments.